782 lines
24 KiB
Java
782 lines
24 KiB
Java
/*
|
|
* Copyright (c) 1994, 2018, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
package java.lang;
|
|
|
|
import dalvik.annotation.optimization.NeverInline;
|
|
import java.util.Arrays;
|
|
import jdk.internal.HotSpotIntrinsicCandidate;
|
|
|
|
/**
|
|
* A thread-safe, mutable sequence of characters.
|
|
* A string buffer is like a {@link String}, but can be modified. At any
|
|
* point in time it contains some particular sequence of characters, but
|
|
* the length and content of the sequence can be changed through certain
|
|
* method calls.
|
|
* <p>
|
|
* String buffers are safe for use by multiple threads. The methods
|
|
* are synchronized where necessary so that all the operations on any
|
|
* particular instance behave as if they occur in some serial order
|
|
* that is consistent with the order of the method calls made by each of
|
|
* the individual threads involved.
|
|
* <p>
|
|
* The principal operations on a {@code StringBuffer} are the
|
|
* {@code append} and {@code insert} methods, which are
|
|
* overloaded so as to accept data of any type. Each effectively
|
|
* converts a given datum to a string and then appends or inserts the
|
|
* characters of that string to the string buffer. The
|
|
* {@code append} method always adds these characters at the end
|
|
* of the buffer; the {@code insert} method adds the characters at
|
|
* a specified point.
|
|
* <p>
|
|
* For example, if {@code z} refers to a string buffer object
|
|
* whose current contents are {@code "start"}, then
|
|
* the method call {@code z.append("le")} would cause the string
|
|
* buffer to contain {@code "startle"}, whereas
|
|
* {@code z.insert(4, "le")} would alter the string buffer to
|
|
* contain {@code "starlet"}.
|
|
* <p>
|
|
* In general, if sb refers to an instance of a {@code StringBuffer},
|
|
* then {@code sb.append(x)} has the same effect as
|
|
* {@code sb.insert(sb.length(), x)}.
|
|
* <p>
|
|
* Whenever an operation occurs involving a source sequence (such as
|
|
* appending or inserting from a source sequence), this class synchronizes
|
|
* only on the string buffer performing the operation, not on the source.
|
|
* Note that while {@code StringBuffer} is designed to be safe to use
|
|
* concurrently from multiple threads, if the constructor or the
|
|
* {@code append} or {@code insert} operation is passed a source sequence
|
|
* that is shared across threads, the calling code must ensure
|
|
* that the operation has a consistent and unchanging view of the source
|
|
* sequence for the duration of the operation.
|
|
* This could be satisfied by the caller holding a lock during the
|
|
* operation's call, by using an immutable source sequence, or by not
|
|
* sharing the source sequence across threads.
|
|
* <p>
|
|
* Every string buffer has a capacity. As long as the length of the
|
|
* character sequence contained in the string buffer does not exceed
|
|
* the capacity, it is not necessary to allocate a new internal
|
|
* buffer array. If the internal buffer overflows, it is
|
|
* automatically made larger.
|
|
* <p>
|
|
* Unless otherwise noted, passing a {@code null} argument to a constructor
|
|
* or method in this class will cause a {@link NullPointerException} to be
|
|
* thrown.
|
|
* <p>
|
|
* As of release JDK 5, this class has been supplemented with an equivalent
|
|
* class designed for use by a single thread, {@link StringBuilder}. The
|
|
* {@code StringBuilder} class should generally be used in preference to
|
|
* this one, as it supports all of the same operations but it is faster, as
|
|
* it performs no synchronization.
|
|
*
|
|
* @apiNote
|
|
* {@code StringBuffer} implements {@code Comparable} but does not override
|
|
* {@link Object#equals equals}. Thus, the natural ordering of {@code StringBuffer}
|
|
* is inconsistent with equals. Care should be exercised if {@code StringBuffer}
|
|
* objects are used as keys in a {@code SortedMap} or elements in a {@code SortedSet}.
|
|
* See {@link Comparable}, {@link java.util.SortedMap SortedMap}, or
|
|
* {@link java.util.SortedSet SortedSet} for more information.
|
|
*
|
|
* @author Arthur van Hoff
|
|
* @see java.lang.StringBuilder
|
|
* @see java.lang.String
|
|
* @since 1.0
|
|
*/
|
|
public final class StringBuffer
|
|
extends AbstractStringBuilder
|
|
implements java.io.Serializable, Comparable<StringBuffer>, CharSequence
|
|
{
|
|
|
|
/**
|
|
* A cache of the last value returned by toString. Cleared
|
|
* whenever the StringBuffer is modified.
|
|
*/
|
|
private transient String toStringCache;
|
|
|
|
/** use serialVersionUID from JDK 1.0.2 for interoperability */
|
|
static final long serialVersionUID = 3388685877147921107L;
|
|
|
|
/**
|
|
* Constructs a string buffer with no characters in it and an
|
|
* initial capacity of 16 characters.
|
|
*/
|
|
@HotSpotIntrinsicCandidate
|
|
public StringBuffer() {
|
|
super(16);
|
|
}
|
|
|
|
/**
|
|
* Constructs a string buffer with no characters in it and
|
|
* the specified initial capacity.
|
|
*
|
|
* @param capacity the initial capacity.
|
|
* @throws NegativeArraySizeException if the {@code capacity}
|
|
* argument is less than {@code 0}.
|
|
*/
|
|
@HotSpotIntrinsicCandidate
|
|
public StringBuffer(int capacity) {
|
|
super(capacity);
|
|
}
|
|
|
|
/**
|
|
* Constructs a string buffer initialized to the contents of the
|
|
* specified string. The initial capacity of the string buffer is
|
|
* {@code 16} plus the length of the string argument.
|
|
*
|
|
* @param str the initial contents of the buffer.
|
|
*/
|
|
@HotSpotIntrinsicCandidate
|
|
public StringBuffer(String str) {
|
|
super(str.length() + 16);
|
|
append(str);
|
|
}
|
|
|
|
/**
|
|
* Constructs a string buffer that contains the same characters
|
|
* as the specified {@code CharSequence}. The initial capacity of
|
|
* the string buffer is {@code 16} plus the length of the
|
|
* {@code CharSequence} argument.
|
|
* <p>
|
|
* If the length of the specified {@code CharSequence} is
|
|
* less than or equal to zero, then an empty buffer of capacity
|
|
* {@code 16} is returned.
|
|
*
|
|
* @param seq the sequence to copy.
|
|
* @since 1.5
|
|
*/
|
|
public StringBuffer(CharSequence seq) {
|
|
this(seq.length() + 16);
|
|
append(seq);
|
|
}
|
|
|
|
/**
|
|
* Compares two {@code StringBuffer} instances lexicographically. This method
|
|
* follows the same rules for lexicographical comparison as defined in the
|
|
* {@linkplain java.lang.CharSequence#compare(java.lang.CharSequence,
|
|
* java.lang.CharSequence) CharSequence.compare(this, another)} method.
|
|
*
|
|
* <p>
|
|
* For finer-grained, locale-sensitive String comparison, refer to
|
|
* {@link java.text.Collator}.
|
|
*
|
|
* @implNote
|
|
* This method synchronizes on {@code this}, the current object, but not
|
|
* {@code StringBuffer another} with which {@code this StringBuffer} is compared.
|
|
*
|
|
* @param another the {@code StringBuffer} to be compared with
|
|
*
|
|
* @return the value {@code 0} if this {@code StringBuffer} contains the same
|
|
* character sequence as that of the argument {@code StringBuffer}; a negative integer
|
|
* if this {@code StringBuffer} is lexicographically less than the
|
|
* {@code StringBuffer} argument; or a positive integer if this {@code StringBuffer}
|
|
* is lexicographically greater than the {@code StringBuffer} argument.
|
|
*
|
|
* @since 11
|
|
*/
|
|
@Override
|
|
public synchronized int compareTo(StringBuffer another) {
|
|
return super.compareTo(another);
|
|
}
|
|
|
|
@Override
|
|
// We don't want to inline this method to be able to perform String-related
|
|
// optimizations with intrinsics.
|
|
@NeverInline
|
|
public synchronized int length() {
|
|
return count;
|
|
}
|
|
|
|
@Override
|
|
public synchronized int capacity() {
|
|
return super.capacity();
|
|
}
|
|
|
|
|
|
@Override
|
|
public synchronized void ensureCapacity(int minimumCapacity) {
|
|
super.ensureCapacity(minimumCapacity);
|
|
}
|
|
|
|
/**
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized void trimToSize() {
|
|
super.trimToSize();
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @see #length()
|
|
*/
|
|
@Override
|
|
public synchronized void setLength(int newLength) {
|
|
toStringCache = null;
|
|
super.setLength(newLength);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @see #length()
|
|
*/
|
|
@Override
|
|
public synchronized char charAt(int index) {
|
|
return super.charAt(index);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized int codePointAt(int index) {
|
|
return super.codePointAt(index);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized int codePointBefore(int index) {
|
|
return super.codePointBefore(index);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized int codePointCount(int beginIndex, int endIndex) {
|
|
return super.codePointCount(beginIndex, endIndex);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized int offsetByCodePoints(int index, int codePointOffset) {
|
|
return super.offsetByCodePoints(index, codePointOffset);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public synchronized void getChars(int srcBegin, int srcEnd, char[] dst,
|
|
int dstBegin)
|
|
{
|
|
super.getChars(srcBegin, srcEnd, dst, dstBegin);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @see #length()
|
|
*/
|
|
@Override
|
|
public synchronized void setCharAt(int index, char ch) {
|
|
toStringCache = null;
|
|
super.setCharAt(index, ch);
|
|
}
|
|
|
|
@Override
|
|
public synchronized StringBuffer append(Object obj) {
|
|
toStringCache = null;
|
|
super.append(String.valueOf(obj));
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
@HotSpotIntrinsicCandidate
|
|
// We don't want to inline this method to be able to perform String-related
|
|
// optimizations with intrinsics.
|
|
@NeverInline
|
|
public synchronized StringBuffer append(String str) {
|
|
toStringCache = null;
|
|
super.append(str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Appends the specified {@code StringBuffer} to this sequence.
|
|
* <p>
|
|
* The characters of the {@code StringBuffer} argument are appended,
|
|
* in order, to the contents of this {@code StringBuffer}, increasing the
|
|
* length of this {@code StringBuffer} by the length of the argument.
|
|
* If {@code sb} is {@code null}, then the four characters
|
|
* {@code "null"} are appended to this {@code StringBuffer}.
|
|
* <p>
|
|
* Let <i>n</i> be the length of the old character sequence, the one
|
|
* contained in the {@code StringBuffer} just prior to execution of the
|
|
* {@code append} method. Then the character at index <i>k</i> in
|
|
* the new character sequence is equal to the character at index <i>k</i>
|
|
* in the old character sequence, if <i>k</i> is less than <i>n</i>;
|
|
* otherwise, it is equal to the character at index <i>k-n</i> in the
|
|
* argument {@code sb}.
|
|
* <p>
|
|
* This method synchronizes on {@code this}, the destination
|
|
* object, but does not synchronize on the source ({@code sb}).
|
|
*
|
|
* @param sb the {@code StringBuffer} to append.
|
|
* @return a reference to this object.
|
|
* @since 1.4
|
|
*/
|
|
public synchronized StringBuffer append(StringBuffer sb) {
|
|
toStringCache = null;
|
|
super.append(sb);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @since 1.8
|
|
*/
|
|
@Override
|
|
synchronized StringBuffer append(AbstractStringBuilder asb) {
|
|
toStringCache = null;
|
|
super.append(asb);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Appends the specified {@code CharSequence} to this
|
|
* sequence.
|
|
* <p>
|
|
* The characters of the {@code CharSequence} argument are appended,
|
|
* in order, increasing the length of this sequence by the length of the
|
|
* argument.
|
|
*
|
|
* <p>The result of this method is exactly the same as if it were an
|
|
* invocation of this.append(s, 0, s.length());
|
|
*
|
|
* <p>This method synchronizes on {@code this}, the destination
|
|
* object, but does not synchronize on the source ({@code s}).
|
|
*
|
|
* <p>If {@code s} is {@code null}, then the four characters
|
|
* {@code "null"} are appended.
|
|
*
|
|
* @param s the {@code CharSequence} to append.
|
|
* @return a reference to this object.
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer append(CharSequence s) {
|
|
toStringCache = null;
|
|
super.append(s);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer append(CharSequence s, int start, int end)
|
|
{
|
|
toStringCache = null;
|
|
super.append(s, start, end);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public synchronized StringBuffer append(char[] str) {
|
|
toStringCache = null;
|
|
super.append(str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer append(char[] str, int offset, int len) {
|
|
toStringCache = null;
|
|
super.append(str, offset, len);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public synchronized StringBuffer append(boolean b) {
|
|
toStringCache = null;
|
|
super.append(b);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
@HotSpotIntrinsicCandidate
|
|
public synchronized StringBuffer append(char c) {
|
|
toStringCache = null;
|
|
super.append(c);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
@HotSpotIntrinsicCandidate
|
|
public synchronized StringBuffer append(int i) {
|
|
toStringCache = null;
|
|
super.append(i);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer appendCodePoint(int codePoint) {
|
|
toStringCache = null;
|
|
super.appendCodePoint(codePoint);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public synchronized StringBuffer append(long lng) {
|
|
toStringCache = null;
|
|
super.append(lng);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public synchronized StringBuffer append(float f) {
|
|
toStringCache = null;
|
|
super.append(f);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public synchronized StringBuffer append(double d) {
|
|
toStringCache = null;
|
|
super.append(d);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.2
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer delete(int start, int end) {
|
|
toStringCache = null;
|
|
super.delete(start, end);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.2
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer deleteCharAt(int index) {
|
|
toStringCache = null;
|
|
super.deleteCharAt(index);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.2
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer replace(int start, int end, String str) {
|
|
toStringCache = null;
|
|
super.replace(start, end, str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.2
|
|
*/
|
|
@Override
|
|
public synchronized String substring(int start) {
|
|
return substring(start, count);
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.4
|
|
*/
|
|
@Override
|
|
public synchronized CharSequence subSequence(int start, int end) {
|
|
return super.substring(start, end);
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.2
|
|
*/
|
|
@Override
|
|
public synchronized String substring(int start, int end) {
|
|
return super.substring(start, end);
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.2
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer insert(int index, char[] str, int offset,
|
|
int len)
|
|
{
|
|
toStringCache = null;
|
|
super.insert(index, str, offset, len);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer insert(int offset, Object obj) {
|
|
toStringCache = null;
|
|
super.insert(offset, String.valueOf(obj));
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer insert(int offset, String str) {
|
|
toStringCache = null;
|
|
super.insert(offset, str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer insert(int offset, char[] str) {
|
|
toStringCache = null;
|
|
super.insert(offset, str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public StringBuffer insert(int dstOffset, CharSequence s) {
|
|
// Note, synchronization achieved via invocations of other StringBuffer methods
|
|
// after narrowing of s to specific type
|
|
// Ditto for toStringCache clearing
|
|
super.insert(dstOffset, s);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer insert(int dstOffset, CharSequence s,
|
|
int start, int end)
|
|
{
|
|
toStringCache = null;
|
|
super.insert(dstOffset, s, start, end);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public StringBuffer insert(int offset, boolean b) {
|
|
// Note, synchronization achieved via invocation of StringBuffer insert(int, String)
|
|
// after conversion of b to String by super class method
|
|
// Ditto for toStringCache clearing
|
|
super.insert(offset, b);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws IndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer insert(int offset, char c) {
|
|
toStringCache = null;
|
|
super.insert(offset, c);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public StringBuffer insert(int offset, int i) {
|
|
// Note, synchronization achieved via invocation of StringBuffer insert(int, String)
|
|
// after conversion of i to String by super class method
|
|
// Ditto for toStringCache clearing
|
|
super.insert(offset, i);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public StringBuffer insert(int offset, long l) {
|
|
// Note, synchronization achieved via invocation of StringBuffer insert(int, String)
|
|
// after conversion of l to String by super class method
|
|
// Ditto for toStringCache clearing
|
|
super.insert(offset, l);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public StringBuffer insert(int offset, float f) {
|
|
// Note, synchronization achieved via invocation of StringBuffer insert(int, String)
|
|
// after conversion of f to String by super class method
|
|
// Ditto for toStringCache clearing
|
|
super.insert(offset, f);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @throws StringIndexOutOfBoundsException {@inheritDoc}
|
|
*/
|
|
@Override
|
|
public StringBuffer insert(int offset, double d) {
|
|
// Note, synchronization achieved via invocation of StringBuffer insert(int, String)
|
|
// after conversion of d to String by super class method
|
|
// Ditto for toStringCache clearing
|
|
super.insert(offset, d);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @since 1.4
|
|
*/
|
|
@Override
|
|
public int indexOf(String str) {
|
|
// Note, synchronization achieved via invocations of other StringBuffer methods
|
|
return super.indexOf(str);
|
|
}
|
|
|
|
/**
|
|
* @since 1.4
|
|
*/
|
|
@Override
|
|
public synchronized int indexOf(String str, int fromIndex) {
|
|
return super.indexOf(str, fromIndex);
|
|
}
|
|
|
|
/**
|
|
* @since 1.4
|
|
*/
|
|
@Override
|
|
public int lastIndexOf(String str) {
|
|
// Note, synchronization achieved via invocations of other StringBuffer methods
|
|
return lastIndexOf(str, count);
|
|
}
|
|
|
|
/**
|
|
* @since 1.4
|
|
*/
|
|
@Override
|
|
public synchronized int lastIndexOf(String str, int fromIndex) {
|
|
return super.lastIndexOf(str, fromIndex);
|
|
}
|
|
|
|
/**
|
|
* @since 1.0.2
|
|
*/
|
|
@Override
|
|
public synchronized StringBuffer reverse() {
|
|
toStringCache = null;
|
|
super.reverse();
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
@HotSpotIntrinsicCandidate
|
|
@NeverInline
|
|
public synchronized String toString() {
|
|
if (toStringCache == null) {
|
|
return toStringCache =
|
|
isLatin1() ? StringLatin1.newString(value, 0, count)
|
|
: StringUTF16.newString(value, 0, count);
|
|
}
|
|
return new String(toStringCache);
|
|
}
|
|
|
|
/**
|
|
* Serializable fields for StringBuffer.
|
|
*
|
|
* @serialField value char[]
|
|
* The backing character array of this StringBuffer.
|
|
* @serialField count int
|
|
* The number of characters in this StringBuffer.
|
|
* @serialField shared boolean
|
|
* A flag indicating whether the backing array is shared.
|
|
* The value is ignored upon deserialization.
|
|
*/
|
|
private static final java.io.ObjectStreamField[] serialPersistentFields =
|
|
{
|
|
new java.io.ObjectStreamField("value", char[].class),
|
|
new java.io.ObjectStreamField("count", Integer.TYPE),
|
|
new java.io.ObjectStreamField("shared", Boolean.TYPE),
|
|
};
|
|
|
|
/**
|
|
* readObject is called to restore the state of the StringBuffer from
|
|
* a stream.
|
|
*/
|
|
private synchronized void writeObject(java.io.ObjectOutputStream s)
|
|
throws java.io.IOException {
|
|
java.io.ObjectOutputStream.PutField fields = s.putFields();
|
|
char[] val = new char[capacity()];
|
|
if (isLatin1()) {
|
|
StringLatin1.getChars(value, 0, count, val, 0);
|
|
} else {
|
|
StringUTF16.getChars(value, 0, count, val, 0);
|
|
}
|
|
fields.put("value", val);
|
|
fields.put("count", count);
|
|
fields.put("shared", false);
|
|
s.writeFields();
|
|
}
|
|
|
|
/**
|
|
* readObject is called to restore the state of the StringBuffer from
|
|
* a stream.
|
|
*/
|
|
private void readObject(java.io.ObjectInputStream s)
|
|
throws java.io.IOException, ClassNotFoundException {
|
|
java.io.ObjectInputStream.GetField fields = s.readFields();
|
|
char[] val = (char[])fields.get("value", null);
|
|
initBytes(val, 0, val.length);
|
|
count = fields.get("count", 0);
|
|
}
|
|
|
|
synchronized void getBytes(byte dst[], int dstBegin, byte coder) {
|
|
super.getBytes(dst, dstBegin, coder);
|
|
}
|
|
}
|