123 lines
4.6 KiB
Java
123 lines
4.6 KiB
Java
/*
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* Copyright (c) 1996, 2018, 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.nio.charset.Charset;
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/**
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* Reads text from character files using a default buffer size. Decoding from bytes
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* to characters uses either a specified {@linkplain java.nio.charset.Charset charset}
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* or the platform's
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* {@linkplain java.nio.charset.Charset#defaultCharset() default charset}.
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*
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* <p>
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* The {@code FileReader} is meant for reading streams of characters. For reading
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* streams of raw bytes, consider using a {@code FileInputStream}.
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*
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* @see InputStreamReader
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* @see FileInputStream
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*
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* @author Mark Reinhold
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* @since 1.1
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*/
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public class FileReader extends InputStreamReader {
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/**
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* Creates a new {@code FileReader}, given the name of the file to read,
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* using the platform's
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* {@linkplain java.nio.charset.Charset#defaultCharset() default charset}.
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*
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* @param fileName the name of the file to read
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* @exception FileNotFoundException if the named file does not exist,
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* is a directory rather than a regular file,
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* or for some other reason cannot be opened for
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* reading.
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*/
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public FileReader(String fileName) throws FileNotFoundException {
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super(new FileInputStream(fileName));
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}
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/**
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* Creates a new {@code FileReader}, given the {@code File} to read,
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* using the platform's
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* {@linkplain java.nio.charset.Charset#defaultCharset() default charset}.
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*
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* @param file the {@code File} to read
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* @exception FileNotFoundException if the file does not exist,
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* is a directory rather than a regular file,
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* or for some other reason cannot be opened for
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* reading.
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*/
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public FileReader(File file) throws FileNotFoundException {
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super(new FileInputStream(file));
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}
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/**
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* Creates a new {@code FileReader}, given the {@code FileDescriptor} to read,
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* using the platform's
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* {@linkplain java.nio.charset.Charset#defaultCharset() default charset}.
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*
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* @param fd the {@code FileDescriptor} to read
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*/
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public FileReader(FileDescriptor fd) {
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super(new FileInputStream(fd));
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}
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/**
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* Creates a new {@code FileReader}, given the name of the file to read
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* and the {@linkplain java.nio.charset.Charset charset}.
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*
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* @param fileName the name of the file to read
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* @param charset the {@linkplain java.nio.charset.Charset charset}
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* @exception IOException if the named file does not exist,
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* is a directory rather than a regular file,
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* or for some other reason cannot be opened for
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* reading.
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*
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* @since 11
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*/
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public FileReader(String fileName, Charset charset) throws IOException {
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super(new FileInputStream(fileName), charset);
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}
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/**
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* Creates a new {@code FileReader}, given the {@code File} to read and
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* the {@linkplain java.nio.charset.Charset charset}.
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*
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* @param file the {@code File} to read
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* @param charset the {@linkplain java.nio.charset.Charset charset}
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* @exception IOException if the file does not exist,
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* is a directory rather than a regular file,
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* or for some other reason cannot be opened for
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* reading.
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*
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* @since 11
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*/
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public FileReader(File file, Charset charset) throws IOException {
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super(new FileInputStream(file), charset);
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}
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}
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