1401 lines
50 KiB
Java
1401 lines
50 KiB
Java
/*
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* Copyright (C) 2014 The Android Open Source Project
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* Copyright (c) 1996, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.io;
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import java.util.Formatter;
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import java.util.Locale;
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import java.nio.charset.Charset;
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import java.nio.charset.IllegalCharsetNameException;
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import java.nio.charset.UnsupportedCharsetException;
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/**
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* A {@code PrintStream} adds functionality to another output stream,
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* namely the ability to print representations of various data values
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* conveniently. Two other features are provided as well. Unlike other output
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* streams, a {@code PrintStream} never throws an
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* {@code IOException}; instead, exceptional situations merely set an
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* internal flag that can be tested via the {@code checkError} method.
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* Optionally, a {@code PrintStream} can be created so as to flush
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* automatically; this means that the {@code flush} method of the underlying
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* output stream is automatically invoked after a byte array is written, one
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* of the {@code println} methods is invoked, or a newline character or byte
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* ({@code '\n'}) is written.
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*
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* <p> All characters printed by a {@code PrintStream} are converted into
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* bytes using the given encoding or charset, or the platform's default
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* character encoding if not specified.
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* The {@link PrintWriter} class should be used in situations that require
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* writing characters rather than bytes.
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*
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* <p> This class always replaces malformed and unmappable character sequences
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* with the charset's default replacement string.
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* The {@linkplain java.nio.charset.CharsetEncoder} class should be used when more
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* control over the encoding process is required.
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*
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* @author Frank Yellin
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* @author Mark Reinhold
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* @since 1.0
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*/
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public class PrintStream extends FilterOutputStream
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implements Appendable, Closeable
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{
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private final boolean autoFlush;
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private boolean trouble = false;
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private Formatter formatter;
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/**
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* Track both the text- and character-output streams, so that their buffers
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* can be flushed without flushing the entire stream.
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*/
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private BufferedWriter textOut;
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private OutputStreamWriter charOut;
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// Android-added: Lazy initialization of charOut and textOut.
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private Charset charset;
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/**
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* requireNonNull is explicitly declared here so as not to create an extra
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* dependency on java.util.Objects.requireNonNull. PrintStream is loaded
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* early during system initialization.
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*/
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private static <T> T requireNonNull(T obj, String message) {
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if (obj == null)
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throw new NullPointerException(message);
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return obj;
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}
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/**
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* Returns a charset object for the given charset name.
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* @throws NullPointerException is csn is null
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* @throws UnsupportedEncodingException if the charset is not supported
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*/
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private static Charset toCharset(String csn)
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throws UnsupportedEncodingException
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{
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requireNonNull(csn, "charsetName");
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try {
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return Charset.forName(csn);
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} catch (IllegalCharsetNameException|UnsupportedCharsetException unused) {
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// UnsupportedEncodingException should be thrown
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throw new UnsupportedEncodingException(csn);
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}
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}
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/* Private constructors */
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private PrintStream(boolean autoFlush, OutputStream out) {
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super(out);
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this.autoFlush = autoFlush;
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// Android-changed: Lazy initialization of charOut and textOut.
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// this.charOut = new OutputStreamWriter(this);
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// this.textOut = new BufferedWriter(charOut);
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}
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/* Variant of the private constructor so that the given charset name
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* can be verified before evaluating the OutputStream argument. Used
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* by constructors creating a FileOutputStream that also take a
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* charset name.
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*/
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private PrintStream(boolean autoFlush, Charset charset, OutputStream out) {
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this(out, autoFlush, charset);
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified OutputStream. Characters written to the stream are converted
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* to bytes using the platform's default character encoding.
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*
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* @param out The output stream to which values and objects will be
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* printed
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*
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* @see java.io.PrintWriter#PrintWriter(java.io.OutputStream)
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*/
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public PrintStream(OutputStream out) {
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this(out, false);
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}
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/**
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* Creates a new print stream, with the specified OutputStream and line
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* flushing. Characters written to the stream are converted to bytes using
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* the platform's default character encoding.
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*
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* @param out The output stream to which values and objects will be
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* printed
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* @param autoFlush Whether the output buffer will be flushed
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* whenever a byte array is written, one of the
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* {@code println} methods is invoked, or a newline
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* character or byte ({@code '\n'}) is written
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*
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* @see java.io.PrintWriter#PrintWriter(java.io.OutputStream, boolean)
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*/
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public PrintStream(OutputStream out, boolean autoFlush) {
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this(autoFlush, requireNonNull(out, "Null output stream"));
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}
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/**
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* Creates a new print stream, with the specified OutputStream, line
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* flushing, and character encoding.
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*
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* @param out The output stream to which values and objects will be
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* printed
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* @param autoFlush Whether the output buffer will be flushed
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* whenever a byte array is written, one of the
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* {@code println} methods is invoked, or a newline
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* character or byte ({@code '\n'}) is written
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* @param encoding The name of a supported
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* <a href="../lang/package-summary.html#charenc">
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* character encoding</a>
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*
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* @throws UnsupportedEncodingException
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* If the named encoding is not supported
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*
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* @since 1.4
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*/
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public PrintStream(OutputStream out, boolean autoFlush, String encoding)
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throws UnsupportedEncodingException
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{
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this(requireNonNull(out, "Null output stream"), autoFlush, toCharset(encoding));
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}
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/**
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* Creates a new print stream, with the specified OutputStream, line
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* flushing and charset. This convenience constructor creates the necessary
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* intermediate {@link java.io.OutputStreamWriter OutputStreamWriter},
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* which will encode characters using the provided charset.
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*
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* @param out The output stream to which values and objects will be
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* printed
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* @param autoFlush Whether the output buffer will be flushed
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* whenever a byte array is written, one of the
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* {@code println} methods is invoked, or a newline
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* character or byte ({@code '\n'}) is written
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* @param charset A {@linkplain java.nio.charset.Charset charset}
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*
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* @since 10
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*/
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public PrintStream(OutputStream out, boolean autoFlush, Charset charset) {
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super(out);
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this.autoFlush = autoFlush;
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this.charOut = new OutputStreamWriter(this, charset);
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this.textOut = new BufferedWriter(charOut);
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified file name. This convenience constructor creates
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* the necessary intermediate {@link java.io.OutputStreamWriter
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* OutputStreamWriter}, which will encode characters using the
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* {@linkplain java.nio.charset.Charset#defaultCharset() default charset}
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* for this instance of the Java virtual machine.
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*
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* @param fileName
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* The name of the file to use as the destination of this print
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* stream. If the file exists, then it will be truncated to
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* zero size; otherwise, a new file will be created. The output
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* will be written to the file and is buffered.
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*
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* @throws FileNotFoundException
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* If the given file object does not denote an existing, writable
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* regular file and a new regular file of that name cannot be
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* created, or if some other error occurs while opening or
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* creating the file
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*
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* @throws SecurityException
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* If a security manager is present and {@link
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* SecurityManager#checkWrite checkWrite(fileName)} denies write
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* access to the file
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*
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* @since 1.5
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*/
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public PrintStream(String fileName) throws FileNotFoundException {
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this(false, new FileOutputStream(fileName));
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified file name and charset. This convenience constructor creates
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* the necessary intermediate {@link java.io.OutputStreamWriter
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* OutputStreamWriter}, which will encode characters using the provided
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* charset.
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*
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* @param fileName
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* The name of the file to use as the destination of this print
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* stream. If the file exists, then it will be truncated to
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* zero size; otherwise, a new file will be created. The output
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* will be written to the file and is buffered.
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*
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* @param csn
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* The name of a supported {@linkplain java.nio.charset.Charset
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* charset}
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*
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* @throws FileNotFoundException
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* If the given file object does not denote an existing, writable
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* regular file and a new regular file of that name cannot be
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* created, or if some other error occurs while opening or
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* creating the file
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*
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* @throws SecurityException
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* If a security manager is present and {@link
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* SecurityManager#checkWrite checkWrite(fileName)} denies write
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* access to the file
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*
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* @throws UnsupportedEncodingException
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* If the named charset is not supported
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*
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* @since 1.5
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*/
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public PrintStream(String fileName, String csn)
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throws FileNotFoundException, UnsupportedEncodingException
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{
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// ensure charset is checked before the file is opened
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this(false, toCharset(csn), new FileOutputStream(fileName));
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified file name and charset. This convenience constructor creates
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* the necessary intermediate {@link java.io.OutputStreamWriter
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* OutputStreamWriter}, which will encode characters using the provided
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* charset.
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*
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* @param fileName
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* The name of the file to use as the destination of this print
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* stream. If the file exists, then it will be truncated to
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* zero size; otherwise, a new file will be created. The output
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* will be written to the file and is buffered.
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*
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* @param charset
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* A {@linkplain java.nio.charset.Charset charset}
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*
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* @throws IOException
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* if an I/O error occurs while opening or creating the file
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*
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* @throws SecurityException
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* If a security manager is present and {@link
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* SecurityManager#checkWrite checkWrite(fileName)} denies write
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* access to the file
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*
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* @since 10
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*/
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public PrintStream(String fileName, Charset charset) throws IOException {
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this(false, requireNonNull(charset, "charset"), new FileOutputStream(fileName));
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified file. This convenience constructor creates the necessary
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* intermediate {@link java.io.OutputStreamWriter OutputStreamWriter},
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* which will encode characters using the {@linkplain
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* java.nio.charset.Charset#defaultCharset() default charset} for this
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* instance of the Java virtual machine.
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*
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* @param file
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* The file to use as the destination of this print stream. If the
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* file exists, then it will be truncated to zero size; otherwise,
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* a new file will be created. The output will be written to the
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* file and is buffered.
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*
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* @throws FileNotFoundException
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* If the given file object does not denote an existing, writable
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* regular file and a new regular file of that name cannot be
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* created, or if some other error occurs while opening or
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* creating the file
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*
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* @throws SecurityException
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* If a security manager is present and {@link
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* SecurityManager#checkWrite checkWrite(file.getPath())}
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* denies write access to the file
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*
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* @since 1.5
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*/
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public PrintStream(File file) throws FileNotFoundException {
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this(false, new FileOutputStream(file));
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified file and charset. This convenience constructor creates
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* the necessary intermediate {@link java.io.OutputStreamWriter
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* OutputStreamWriter}, which will encode characters using the provided
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* charset.
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*
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* @param file
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* The file to use as the destination of this print stream. If the
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* file exists, then it will be truncated to zero size; otherwise,
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* a new file will be created. The output will be written to the
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* file and is buffered.
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*
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* @param csn
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* The name of a supported {@linkplain java.nio.charset.Charset
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* charset}
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*
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* @throws FileNotFoundException
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* If the given file object does not denote an existing, writable
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* regular file and a new regular file of that name cannot be
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* created, or if some other error occurs while opening or
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* creating the file
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*
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* @throws SecurityException
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* If a security manager is present and {@link
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* SecurityManager#checkWrite checkWrite(file.getPath())}
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* denies write access to the file
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*
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* @throws UnsupportedEncodingException
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* If the named charset is not supported
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*
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* @since 1.5
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*/
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public PrintStream(File file, String csn)
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throws FileNotFoundException, UnsupportedEncodingException
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{
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// ensure charset is checked before the file is opened
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this(false, toCharset(csn), new FileOutputStream(file));
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}
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/**
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* Creates a new print stream, without automatic line flushing, with the
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* specified file and charset. This convenience constructor creates
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* the necessary intermediate {@link java.io.OutputStreamWriter
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* OutputStreamWriter}, which will encode characters using the provided
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* charset.
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*
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* @param file
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* The file to use as the destination of this print stream. If the
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* file exists, then it will be truncated to zero size; otherwise,
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* a new file will be created. The output will be written to the
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* file and is buffered.
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*
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* @param charset
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* A {@linkplain java.nio.charset.Charset charset}
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*
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* @throws IOException
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* if an I/O error occurs while opening or creating the file
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*
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* @throws SecurityException
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* If a security manager is present and {@link
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* SecurityManager#checkWrite checkWrite(file.getPath())}
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* denies write access to the file
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*
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* @since 10
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*/
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public PrintStream(File file, Charset charset) throws IOException {
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this(false, requireNonNull(charset, "charset"), new FileOutputStream(file));
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}
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/** Check to make sure that the stream has not been closed */
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private void ensureOpen() throws IOException {
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if (out == null)
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throw new IOException("Stream closed");
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}
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/**
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* Flushes the stream. This is done by writing any buffered output bytes to
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* the underlying output stream and then flushing that stream.
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*
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* @see java.io.OutputStream#flush()
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*/
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@Override
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public void flush() {
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synchronized (this) {
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try {
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ensureOpen();
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out.flush();
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}
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catch (IOException x) {
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trouble = true;
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}
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}
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}
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private boolean closing = false; /* To avoid recursive closing */
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// BEGIN Android-added: Lazy initialization of charOut and textOut.
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private BufferedWriter getTextOut() {
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if (textOut == null) {
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charOut = charset != null ? new OutputStreamWriter(this, charset) :
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new OutputStreamWriter(this);
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textOut = new BufferedWriter(charOut);
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}
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return textOut;
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}
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// END Android-added: Lazy initialization of charOut and textOut.
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/**
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* Closes the stream. This is done by flushing the stream and then closing
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* the underlying output stream.
|
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*
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* @see java.io.OutputStream#close()
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*/
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@Override
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public void close() {
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synchronized (this) {
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if (! closing) {
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closing = true;
|
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try {
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// BEGIN Android-changed: Lazy initialization of charOut and textOut.
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// textOut.close();
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if (textOut != null) {
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textOut.close();
|
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}
|
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// END Android-changed: Lazy initialization of charOut and textOut.
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out.close();
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}
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catch (IOException x) {
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trouble = true;
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}
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textOut = null;
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charOut = null;
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out = null;
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}
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}
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}
|
|
|
|
/**
|
|
* Flushes the stream and checks its error state. The internal error state
|
|
* is set to {@code true} when the underlying output stream throws an
|
|
* {@code IOException} other than {@code InterruptedIOException},
|
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* and when the {@code setError} method is invoked. If an operation
|
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* on the underlying output stream throws an
|
|
* {@code InterruptedIOException}, then the {@code PrintStream}
|
|
* converts the exception back into an interrupt by doing:
|
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* <pre>{@code
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* Thread.currentThread().interrupt();
|
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* }</pre>
|
|
* or the equivalent.
|
|
*
|
|
* @return {@code true} if and only if this stream has encountered an
|
|
* {@code IOException} other than
|
|
* {@code InterruptedIOException}, or the
|
|
* {@code setError} method has been invoked
|
|
*/
|
|
public boolean checkError() {
|
|
if (out != null)
|
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flush();
|
|
if (out instanceof PrintStream ps) {
|
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return ps.checkError();
|
|
}
|
|
return trouble;
|
|
}
|
|
|
|
/**
|
|
* Sets the error state of the stream to {@code true}.
|
|
*
|
|
* <p> This method will cause subsequent invocations of {@link
|
|
* #checkError()} to return {@code true} until
|
|
* {@link #clearError()} is invoked.
|
|
*
|
|
* @since 1.1
|
|
*/
|
|
protected void setError() {
|
|
trouble = true;
|
|
}
|
|
|
|
/**
|
|
* Clears the internal error state of this stream.
|
|
*
|
|
* <p> This method will cause subsequent invocations of {@link
|
|
* #checkError()} to return {@code false} until another write
|
|
* operation fails and invokes {@link #setError()}.
|
|
*
|
|
* @since 1.6
|
|
*/
|
|
protected void clearError() {
|
|
trouble = false;
|
|
}
|
|
|
|
/*
|
|
* Exception-catching, synchronized output operations,
|
|
* which also implement the write() methods of OutputStream
|
|
*/
|
|
|
|
/**
|
|
* Writes the specified byte to this stream. If the byte is a newline and
|
|
* automatic flushing is enabled then the {@code flush} method will be
|
|
* invoked on the underlying output stream.
|
|
*
|
|
* <p> Note that the byte is written as given; to write a character that
|
|
* will be translated according to the platform's default character
|
|
* encoding, use the {@code print(char)} or {@code println(char)}
|
|
* methods.
|
|
*
|
|
* @param b The byte to be written
|
|
* @see #print(char)
|
|
* @see #println(char)
|
|
*/
|
|
@Override
|
|
public void write(int b) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
out.write(b);
|
|
if ((b == '\n') && autoFlush)
|
|
out.flush();
|
|
}
|
|
}
|
|
catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
}
|
|
catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes {@code len} bytes from the specified byte array starting at
|
|
* offset {@code off} to this stream. If automatic flushing is
|
|
* enabled then the {@code flush} method will be invoked on the underlying
|
|
* output stream.
|
|
*
|
|
* <p> Note that the bytes will be written as given; to write characters
|
|
* that will be translated according to the platform's default character
|
|
* encoding, use the {@code print(char)} or {@code println(char)}
|
|
* methods.
|
|
*
|
|
* @param buf A byte array
|
|
* @param off Offset from which to start taking bytes
|
|
* @param len Number of bytes to write
|
|
*/
|
|
@Override
|
|
public void write(byte buf[], int off, int len) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
out.write(buf, off, len);
|
|
if (autoFlush)
|
|
out.flush();
|
|
}
|
|
}
|
|
catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
}
|
|
catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes all bytes from the specified byte array to this stream. If
|
|
* automatic flushing is enabled then the {@code flush} method will be
|
|
* invoked on the underlying output stream.
|
|
*
|
|
* <p> Note that the bytes will be written as given; to write characters
|
|
* that will be translated according to the platform's default character
|
|
* encoding, use the {@code print(char[])} or {@code println(char[])}
|
|
* methods.
|
|
*
|
|
* @apiNote
|
|
* Although declared to throw {@code IOException}, this method never
|
|
* actually does so. Instead, like other methods that this class
|
|
* overrides, it sets an internal flag which may be tested via the
|
|
* {@link #checkError()} method. To write an array of bytes without having
|
|
* to write a {@code catch} block for the {@code IOException}, use either
|
|
* {@link #writeBytes(byte[] buf) writeBytes(buf)} or
|
|
* {@link #write(byte[], int, int) write(buf, 0, buf.length)}.
|
|
*
|
|
* @implSpec
|
|
* This method is equivalent to
|
|
* {@link java.io.PrintStream#write(byte[],int,int)
|
|
* this.write(buf, 0, buf.length)}.
|
|
*
|
|
* @param buf A byte array
|
|
*
|
|
* @throws IOException If an I/O error occurs.
|
|
*
|
|
* @see #writeBytes(byte[])
|
|
* @see #write(byte[],int,int)
|
|
*
|
|
* @since 14
|
|
*/
|
|
@Override
|
|
public void write(byte buf[]) throws IOException {
|
|
this.write(buf, 0, buf.length);
|
|
}
|
|
|
|
/**
|
|
* Writes all bytes from the specified byte array to this stream.
|
|
* If automatic flushing is enabled then the {@code flush} method
|
|
* will be invoked.
|
|
*
|
|
* <p> Note that the bytes will be written as given; to write characters
|
|
* that will be translated according to the platform's default character
|
|
* encoding, use the {@code print(char[])} or {@code println(char[])}
|
|
* methods.
|
|
*
|
|
* @implSpec
|
|
* This method is equivalent to
|
|
* {@link #write(byte[], int, int) this.write(buf, 0, buf.length)}.
|
|
*
|
|
* @param buf A byte array
|
|
*
|
|
* @since 14
|
|
*/
|
|
public void writeBytes(byte buf[]) {
|
|
this.write(buf, 0, buf.length);
|
|
}
|
|
|
|
/*
|
|
* The following private methods on the text- and character-output streams
|
|
* always flush the stream buffers, so that writes to the underlying byte
|
|
* stream occur as promptly as with the original PrintStream.
|
|
*/
|
|
|
|
private void write(char[] buf) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
// Android-added: Lazy initialization of charOut and textOut.
|
|
BufferedWriter textOut = getTextOut();
|
|
textOut.write(buf);
|
|
textOut.flushBuffer();
|
|
charOut.flushBuffer();
|
|
if (autoFlush) {
|
|
for (int i = 0; i < buf.length; i++)
|
|
if (buf[i] == '\n') {
|
|
out.flush();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
} catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
// Used to optimize away back-to-back flushing and synchronization when
|
|
// using println, but since subclasses could exist which depend on
|
|
// observing a call to print followed by newLine() we only use this if
|
|
// getClass() == PrintStream.class to avoid compatibility issues.
|
|
private void writeln(char[] buf) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
// Android-added: Lazy initialization of charOut and textOut.
|
|
BufferedWriter textOut = getTextOut();
|
|
textOut.write(buf);
|
|
textOut.newLine();
|
|
textOut.flushBuffer();
|
|
charOut.flushBuffer();
|
|
if (autoFlush)
|
|
out.flush();
|
|
}
|
|
}
|
|
catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
}
|
|
catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
private void write(String s) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
// Android-added: Lazy initialization of charOut and textOut.
|
|
BufferedWriter textOut = getTextOut();
|
|
textOut.write(s);
|
|
textOut.flushBuffer();
|
|
charOut.flushBuffer();
|
|
if (autoFlush && (s.indexOf('\n') >= 0))
|
|
out.flush();
|
|
}
|
|
}
|
|
catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
}
|
|
catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
// Used to optimize away back-to-back flushing and synchronization when
|
|
// using println, but since subclasses could exist which depend on
|
|
// observing a call to print followed by newLine we only use this if
|
|
// getClass() == PrintStream.class to avoid compatibility issues.
|
|
private void writeln(String s) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
// Android-added: Lazy initialization of charOut and textOut.
|
|
BufferedWriter textOut = getTextOut();
|
|
textOut.write(s);
|
|
textOut.newLine();
|
|
textOut.flushBuffer();
|
|
charOut.flushBuffer();
|
|
if (autoFlush)
|
|
out.flush();
|
|
}
|
|
}
|
|
catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
}
|
|
catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
private void newLine() {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
// Android-added: Lazy initialization of charOut and textOut.
|
|
BufferedWriter textOut = getTextOut();
|
|
textOut.newLine();
|
|
textOut.flushBuffer();
|
|
charOut.flushBuffer();
|
|
if (autoFlush)
|
|
out.flush();
|
|
}
|
|
}
|
|
catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
}
|
|
catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
}
|
|
|
|
/* Methods that do not terminate lines */
|
|
|
|
/**
|
|
* Prints a boolean value. The string produced by {@link
|
|
* java.lang.String#valueOf(boolean)} is translated into bytes
|
|
* according to the platform's default character encoding, and these bytes
|
|
* are written in exactly the manner of the
|
|
* {@link #write(int)} method.
|
|
*
|
|
* @param b The {@code boolean} to be printed
|
|
*/
|
|
public void print(boolean b) {
|
|
write(String.valueOf(b));
|
|
}
|
|
|
|
/**
|
|
* Prints a character. The character is translated into one or more bytes
|
|
* according to the character encoding given to the constructor, or the
|
|
* platform's default character encoding if none specified. These bytes
|
|
* are written in exactly the manner of the {@link #write(int)} method.
|
|
*
|
|
* @param c The {@code char} to be printed
|
|
*/
|
|
public void print(char c) {
|
|
write(String.valueOf(c));
|
|
}
|
|
|
|
/**
|
|
* Prints an integer. The string produced by {@link
|
|
* java.lang.String#valueOf(int)} is translated into bytes
|
|
* according to the platform's default character encoding, and these bytes
|
|
* are written in exactly the manner of the
|
|
* {@link #write(int)} method.
|
|
*
|
|
* @param i The {@code int} to be printed
|
|
* @see java.lang.Integer#toString(int)
|
|
*/
|
|
public void print(int i) {
|
|
write(String.valueOf(i));
|
|
}
|
|
|
|
/**
|
|
* Prints a long integer. The string produced by {@link
|
|
* java.lang.String#valueOf(long)} is translated into bytes
|
|
* according to the platform's default character encoding, and these bytes
|
|
* are written in exactly the manner of the
|
|
* {@link #write(int)} method.
|
|
*
|
|
* @param l The {@code long} to be printed
|
|
* @see java.lang.Long#toString(long)
|
|
*/
|
|
public void print(long l) {
|
|
write(String.valueOf(l));
|
|
}
|
|
|
|
/**
|
|
* Prints a floating-point number. The string produced by {@link
|
|
* java.lang.String#valueOf(float)} is translated into bytes
|
|
* according to the platform's default character encoding, and these bytes
|
|
* are written in exactly the manner of the
|
|
* {@link #write(int)} method.
|
|
*
|
|
* @param f The {@code float} to be printed
|
|
* @see java.lang.Float#toString(float)
|
|
*/
|
|
public void print(float f) {
|
|
write(String.valueOf(f));
|
|
}
|
|
|
|
/**
|
|
* Prints a double-precision floating-point number. The string produced by
|
|
* {@link java.lang.String#valueOf(double)} is translated into
|
|
* bytes according to the platform's default character encoding, and these
|
|
* bytes are written in exactly the manner of the {@link
|
|
* #write(int)} method.
|
|
*
|
|
* @param d The {@code double} to be printed
|
|
* @see java.lang.Double#toString(double)
|
|
*/
|
|
public void print(double d) {
|
|
write(String.valueOf(d));
|
|
}
|
|
|
|
/**
|
|
* Prints an array of characters. The characters are converted into bytes
|
|
* according to the character encoding given to the constructor, or the
|
|
* platform's default character encoding if none specified. These bytes
|
|
* are written in exactly the manner of the {@link #write(int)} method.
|
|
*
|
|
* @param s The array of chars to be printed
|
|
*
|
|
* @throws NullPointerException If {@code s} is {@code null}
|
|
*/
|
|
public void print(char s[]) {
|
|
write(s);
|
|
}
|
|
|
|
/**
|
|
* Prints a string. If the argument is {@code null} then the string
|
|
* {@code "null"} is printed. Otherwise, the string's characters are
|
|
* converted into bytes according to the character encoding given to the
|
|
* constructor, or the platform's default character encoding if none
|
|
* specified. These bytes are written in exactly the manner of the
|
|
* {@link #write(int)} method.
|
|
*
|
|
* @param s The {@code String} to be printed
|
|
*/
|
|
public void print(String s) {
|
|
write(String.valueOf(s));
|
|
}
|
|
|
|
/**
|
|
* Prints an object. The string produced by the {@link
|
|
* java.lang.String#valueOf(Object)} method is translated into bytes
|
|
* according to the platform's default character encoding, and these bytes
|
|
* are written in exactly the manner of the
|
|
* {@link #write(int)} method.
|
|
*
|
|
* @param obj The {@code Object} to be printed
|
|
* @see java.lang.Object#toString()
|
|
*/
|
|
public void print(Object obj) {
|
|
write(String.valueOf(obj));
|
|
}
|
|
|
|
|
|
/* Methods that do terminate lines */
|
|
|
|
/**
|
|
* Terminates the current line by writing the line separator string. The
|
|
* line separator string is defined by the system property
|
|
* {@code line.separator}, and is not necessarily a single newline
|
|
* character ({@code '\n'}).
|
|
*/
|
|
public void println() {
|
|
newLine();
|
|
}
|
|
|
|
/**
|
|
* Prints a boolean and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(boolean)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code boolean} to be printed
|
|
*/
|
|
public void println(boolean x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints a character and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(char)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code char} to be printed.
|
|
*/
|
|
public void println(char x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints an integer and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(int)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code int} to be printed.
|
|
*/
|
|
public void println(int x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints a long and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(long)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x a The {@code long} to be printed.
|
|
*/
|
|
public void println(long x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints a float and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(float)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code float} to be printed.
|
|
*/
|
|
public void println(float x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints a double and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(double)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code double} to be printed.
|
|
*/
|
|
public void println(double x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints an array of characters and then terminate the line. This method
|
|
* behaves as though it invokes {@link #print(char[])} and
|
|
* then {@link #println()}.
|
|
*
|
|
* @param x an array of chars to print.
|
|
*/
|
|
public void println(char[] x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(x);
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints a String and then terminate the line. This method behaves as
|
|
* though it invokes {@link #print(String)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code String} to be printed.
|
|
*/
|
|
public void println(String x) {
|
|
if (getClass() == PrintStream.class) {
|
|
writeln(String.valueOf(x));
|
|
} else {
|
|
synchronized (this) {
|
|
print(x);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints an Object and then terminate the line. This method calls
|
|
* at first String.valueOf(x) to get the printed object's string value,
|
|
* then behaves as
|
|
* though it invokes {@link #print(String)} and then
|
|
* {@link #println()}.
|
|
*
|
|
* @param x The {@code Object} to be printed.
|
|
*/
|
|
public void println(Object x) {
|
|
String s = String.valueOf(x);
|
|
if (getClass() == PrintStream.class) {
|
|
// need to apply String.valueOf again since first invocation
|
|
// might return null
|
|
writeln(String.valueOf(s));
|
|
} else {
|
|
synchronized (this) {
|
|
print(s);
|
|
newLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* A convenience method to write a formatted string to this output stream
|
|
* using the specified format string and arguments.
|
|
*
|
|
* <p> An invocation of this method of the form
|
|
* {@code out.printf(format, args)} behaves
|
|
* in exactly the same way as the invocation
|
|
*
|
|
* <pre>{@code
|
|
* out.format(format, args)
|
|
* }</pre>
|
|
*
|
|
* @param format
|
|
* A format string as described in <a
|
|
* href="../util/Formatter.html#syntax">Format string syntax</a>
|
|
*
|
|
* @param args
|
|
* Arguments referenced by the format specifiers in the format
|
|
* string. If there are more arguments than format specifiers, the
|
|
* extra arguments are ignored. The number of arguments is
|
|
* variable and may be zero. The maximum number of arguments is
|
|
* limited by the maximum dimension of a Java array as defined by
|
|
* <cite>The Java Virtual Machine Specification</cite>.
|
|
* The behaviour on a
|
|
* {@code null} argument depends on the <a
|
|
* href="../util/Formatter.html#syntax">conversion</a>.
|
|
*
|
|
* @throws java.util.IllegalFormatException
|
|
* If a format string contains an illegal syntax, a format
|
|
* specifier that is incompatible with the given arguments,
|
|
* insufficient arguments given the format string, or other
|
|
* illegal conditions. For specification of all possible
|
|
* formatting errors, see the <a
|
|
* href="../util/Formatter.html#detail">Details</a> section of the
|
|
* formatter class specification.
|
|
*
|
|
* @throws NullPointerException
|
|
* If the {@code format} is {@code null}
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream printf(String format, Object ... args) {
|
|
return format(format, args);
|
|
}
|
|
|
|
/**
|
|
* A convenience method to write a formatted string to this output stream
|
|
* using the specified format string and arguments.
|
|
*
|
|
* <p> An invocation of this method of the form
|
|
* {@code out.printf(l, format, args)} behaves
|
|
* in exactly the same way as the invocation
|
|
*
|
|
* <pre>{@code
|
|
* out.format(l, format, args)
|
|
* }</pre>
|
|
*
|
|
* @param l
|
|
* The {@linkplain java.util.Locale locale} to apply during
|
|
* formatting. If {@code l} is {@code null} then no localization
|
|
* is applied.
|
|
*
|
|
* @param format
|
|
* A format string as described in <a
|
|
* href="../util/Formatter.html#syntax">Format string syntax</a>
|
|
*
|
|
* @param args
|
|
* Arguments referenced by the format specifiers in the format
|
|
* string. If there are more arguments than format specifiers, the
|
|
* extra arguments are ignored. The number of arguments is
|
|
* variable and may be zero. The maximum number of arguments is
|
|
* limited by the maximum dimension of a Java array as defined by
|
|
* <cite>The Java Virtual Machine Specification</cite>.
|
|
* The behaviour on a
|
|
* {@code null} argument depends on the <a
|
|
* href="../util/Formatter.html#syntax">conversion</a>.
|
|
*
|
|
* @throws java.util.IllegalFormatException
|
|
* If a format string contains an illegal syntax, a format
|
|
* specifier that is incompatible with the given arguments,
|
|
* insufficient arguments given the format string, or other
|
|
* illegal conditions. For specification of all possible
|
|
* formatting errors, see the <a
|
|
* href="../util/Formatter.html#detail">Details</a> section of the
|
|
* formatter class specification.
|
|
*
|
|
* @throws NullPointerException
|
|
* If the {@code format} is {@code null}
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream printf(Locale l, String format, Object ... args) {
|
|
return format(l, format, args);
|
|
}
|
|
|
|
/**
|
|
* Writes a formatted string to this output stream using the specified
|
|
* format string and arguments.
|
|
*
|
|
* <p> The locale always used is the one returned by {@link
|
|
* java.util.Locale#getDefault(Locale.Category)} with
|
|
* {@link java.util.Locale.Category#FORMAT FORMAT} category specified,
|
|
* regardless of any previous invocations of other formatting methods on
|
|
* this object.
|
|
*
|
|
* @param format
|
|
* A format string as described in <a
|
|
* href="../util/Formatter.html#syntax">Format string syntax</a>
|
|
*
|
|
* @param args
|
|
* Arguments referenced by the format specifiers in the format
|
|
* string. If there are more arguments than format specifiers, the
|
|
* extra arguments are ignored. The number of arguments is
|
|
* variable and may be zero. The maximum number of arguments is
|
|
* limited by the maximum dimension of a Java array as defined by
|
|
* <cite>The Java Virtual Machine Specification</cite>.
|
|
* The behaviour on a
|
|
* {@code null} argument depends on the <a
|
|
* href="../util/Formatter.html#syntax">conversion</a>.
|
|
*
|
|
* @throws java.util.IllegalFormatException
|
|
* If a format string contains an illegal syntax, a format
|
|
* specifier that is incompatible with the given arguments,
|
|
* insufficient arguments given the format string, or other
|
|
* illegal conditions. For specification of all possible
|
|
* formatting errors, see the <a
|
|
* href="../util/Formatter.html#detail">Details</a> section of the
|
|
* formatter class specification.
|
|
*
|
|
* @throws NullPointerException
|
|
* If the {@code format} is {@code null}
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream format(String format, Object ... args) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
if ((formatter == null)
|
|
|| (formatter.locale() !=
|
|
Locale.getDefault(Locale.Category.FORMAT)))
|
|
formatter = new Formatter((Appendable) this);
|
|
formatter.format(Locale.getDefault(Locale.Category.FORMAT),
|
|
format, args);
|
|
}
|
|
} catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
} catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Writes a formatted string to this output stream using the specified
|
|
* format string and arguments.
|
|
*
|
|
* @param l
|
|
* The {@linkplain java.util.Locale locale} to apply during
|
|
* formatting. If {@code l} is {@code null} then no localization
|
|
* is applied.
|
|
*
|
|
* @param format
|
|
* A format string as described in <a
|
|
* href="../util/Formatter.html#syntax">Format string syntax</a>
|
|
*
|
|
* @param args
|
|
* Arguments referenced by the format specifiers in the format
|
|
* string. If there are more arguments than format specifiers, the
|
|
* extra arguments are ignored. The number of arguments is
|
|
* variable and may be zero. The maximum number of arguments is
|
|
* limited by the maximum dimension of a Java array as defined by
|
|
* <cite>The Java Virtual Machine Specification</cite>.
|
|
* The behaviour on a
|
|
* {@code null} argument depends on the <a
|
|
* href="../util/Formatter.html#syntax">conversion</a>.
|
|
*
|
|
* @throws java.util.IllegalFormatException
|
|
* If a format string contains an illegal syntax, a format
|
|
* specifier that is incompatible with the given arguments,
|
|
* insufficient arguments given the format string, or other
|
|
* illegal conditions. For specification of all possible
|
|
* formatting errors, see the <a
|
|
* href="../util/Formatter.html#detail">Details</a> section of the
|
|
* formatter class specification.
|
|
*
|
|
* @throws NullPointerException
|
|
* If the {@code format} is {@code null}
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream format(Locale l, String format, Object ... args) {
|
|
try {
|
|
synchronized (this) {
|
|
ensureOpen();
|
|
if ((formatter == null)
|
|
|| (formatter.locale() != l))
|
|
formatter = new Formatter(this, l);
|
|
formatter.format(l, format, args);
|
|
}
|
|
} catch (InterruptedIOException x) {
|
|
Thread.currentThread().interrupt();
|
|
} catch (IOException x) {
|
|
trouble = true;
|
|
}
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Appends the specified character sequence to this output stream.
|
|
*
|
|
* <p> An invocation of this method of the form {@code out.append(csq)}
|
|
* behaves in exactly the same way as the invocation
|
|
*
|
|
* <pre>{@code
|
|
* out.print(csq.toString())
|
|
* }</pre>
|
|
*
|
|
* <p> Depending on the specification of {@code toString} for the
|
|
* character sequence {@code csq}, the entire sequence may not be
|
|
* appended. For instance, invoking then {@code toString} method of a
|
|
* character buffer will return a subsequence whose content depends upon
|
|
* the buffer's position and limit.
|
|
*
|
|
* @param csq
|
|
* The character sequence to append. If {@code csq} is
|
|
* {@code null}, then the four characters {@code "null"} are
|
|
* appended to this output stream.
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream append(CharSequence csq) {
|
|
print(String.valueOf(csq));
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Appends a subsequence of the specified character sequence to this output
|
|
* stream.
|
|
*
|
|
* <p> An invocation of this method of the form
|
|
* {@code out.append(csq, start, end)} when
|
|
* {@code csq} is not {@code null}, behaves in
|
|
* exactly the same way as the invocation
|
|
*
|
|
* <pre>{@code
|
|
* out.print(csq.subSequence(start, end).toString())
|
|
* }</pre>
|
|
*
|
|
* @param csq
|
|
* The character sequence from which a subsequence will be
|
|
* appended. If {@code csq} is {@code null}, then characters
|
|
* will be appended as if {@code csq} contained the four
|
|
* characters {@code "null"}.
|
|
*
|
|
* @param start
|
|
* The index of the first character in the subsequence
|
|
*
|
|
* @param end
|
|
* The index of the character following the last character in the
|
|
* subsequence
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @throws IndexOutOfBoundsException
|
|
* If {@code start} or {@code end} are negative, {@code start}
|
|
* is greater than {@code end}, or {@code end} is greater than
|
|
* {@code csq.length()}
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream append(CharSequence csq, int start, int end) {
|
|
if (csq == null) csq = "null";
|
|
return append(csq.subSequence(start, end));
|
|
}
|
|
|
|
/**
|
|
* Appends the specified character to this output stream.
|
|
*
|
|
* <p> An invocation of this method of the form {@code out.append(c)}
|
|
* behaves in exactly the same way as the invocation
|
|
*
|
|
* <pre>{@code
|
|
* out.print(c)
|
|
* }</pre>
|
|
*
|
|
* @param c
|
|
* The 16-bit character to append
|
|
*
|
|
* @return This output stream
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
public PrintStream append(char c) {
|
|
print(c);
|
|
return this;
|
|
}
|
|
|
|
}
|