mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-08 09:07:53 +00:00
977 lines
32 KiB
Java
977 lines
32 KiB
Java
/* StringBuffer.java -- Growable strings
|
|
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2008
|
|
Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package java.lang;
|
|
|
|
import java.io.Serializable;
|
|
|
|
/**
|
|
* <code>StringBuffer</code> represents a changeable <code>String</code>.
|
|
* It provides the operations required to modify the
|
|
* <code>StringBuffer</code>, including insert, replace, delete, append,
|
|
* and reverse. It is thread-safe; meaning that all modifications to a buffer
|
|
* are in synchronized methods.
|
|
*
|
|
* <p><code>StringBuffer</code>s are variable-length in nature, so even if
|
|
* you initialize them to a certain size, they can still grow larger than
|
|
* that. <em>Capacity</em> indicates the number of characters the
|
|
* <code>StringBuffer</code> can have in it before it has to grow (growing
|
|
* the char array is an expensive operation involving <code>new</code>).
|
|
*
|
|
* <p>Incidentally, compilers often implement the String operator "+"
|
|
* by using a <code>StringBuffer</code> operation:<br>
|
|
* <code>a + b</code><br>
|
|
* is the same as<br>
|
|
* <code>new StringBuffer().append(a).append(b).toString()</code>.
|
|
*
|
|
* <p>Classpath's StringBuffer is capable of sharing memory with Strings for
|
|
* efficiency. This will help when a StringBuffer is converted to a String
|
|
* and the StringBuffer is not changed after that (quite common when performing
|
|
* string concatenation).
|
|
*
|
|
* @author Paul Fisher
|
|
* @author John Keiser
|
|
* @author Tom Tromey
|
|
* @author Eric Blake (ebb9@email.byu.edu)
|
|
* @see String
|
|
* @since 1.0
|
|
* @status updated to 1.4
|
|
*/
|
|
public final class StringBuffer
|
|
extends AbstractStringBuffer
|
|
implements Serializable, CharSequence, Appendable
|
|
{
|
|
// Implementation note: if you change this class, you usually will
|
|
// want to change StringBuilder as well.
|
|
|
|
/**
|
|
* Compatible with JDK 1.0+.
|
|
*/
|
|
private static final long serialVersionUID = 3388685877147921107L;
|
|
|
|
/**
|
|
* True if the buffer is shared with another object (StringBuffer or
|
|
* String); this means the buffer must be copied before writing to it again.
|
|
* Note that this has permissions set this way so that String can get the
|
|
* value.
|
|
*
|
|
* @serial whether the buffer is shared
|
|
*/
|
|
boolean shared;
|
|
|
|
/**
|
|
* Create a new StringBuffer with default capacity 16.
|
|
*/
|
|
public StringBuffer()
|
|
{
|
|
super();
|
|
}
|
|
|
|
/**
|
|
* Create an empty <code>StringBuffer</code> with the specified initial
|
|
* capacity.
|
|
*
|
|
* @param capacity the initial capacity
|
|
* @throws NegativeArraySizeException if capacity is negative
|
|
*/
|
|
public StringBuffer(int capacity)
|
|
{
|
|
super(capacity);
|
|
}
|
|
|
|
/**
|
|
* Create a new <code>StringBuffer</code> with the characters in the
|
|
* specified <code>String</code>. Initial capacity will be the size of the
|
|
* String plus 16.
|
|
*
|
|
* @param str the <code>String</code> to convert
|
|
* @throws NullPointerException if str is null
|
|
*/
|
|
public StringBuffer(String str)
|
|
{
|
|
// Unfortunately, because the size is 16 larger, we cannot share.
|
|
super(str);
|
|
}
|
|
|
|
/**
|
|
* Create a new <code>StringBuffer</code> with the characters in the
|
|
* specified <code>CharSequence</code>. Initial capacity will be the
|
|
* length of the sequence plus 16; if the sequence reports a length
|
|
* less than or equal to 0, then the initial capacity will be 16.
|
|
*
|
|
* @param seq the initializing <code>CharSequence</code>
|
|
* @throws NullPointerException if str is null
|
|
* @since 1.5
|
|
*/
|
|
public StringBuffer(CharSequence seq)
|
|
{
|
|
super(seq);
|
|
}
|
|
|
|
/**
|
|
* Get the length of the <code>String</code> this <code>StringBuffer</code>
|
|
* would create. Not to be confused with the <em>capacity</em> of the
|
|
* <code>StringBuffer</code>.
|
|
*
|
|
* @return the length of this <code>StringBuffer</code>
|
|
* @see #capacity()
|
|
* @see #setLength(int)
|
|
*/
|
|
public synchronized int length()
|
|
{
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Get the total number of characters this <code>StringBuffer</code> can
|
|
* support before it must be grown. Not to be confused with <em>length</em>.
|
|
*
|
|
* @return the capacity of this <code>StringBuffer</code>
|
|
* @see #length()
|
|
* @see #ensureCapacity(int)
|
|
*/
|
|
public synchronized int capacity()
|
|
{
|
|
return value.length;
|
|
}
|
|
|
|
/**
|
|
* Increase the capacity of this <code>StringBuffer</code>. This will
|
|
* ensure that an expensive growing operation will not occur until
|
|
* <code>minimumCapacity</code> is reached. The buffer is grown to the
|
|
* larger of <code>minimumCapacity</code> and
|
|
* <code>capacity() * 2 + 2</code>, if it is not already large enough.
|
|
*
|
|
* @param minimumCapacity the new capacity
|
|
* @see #capacity()
|
|
*/
|
|
public synchronized void ensureCapacity(int minimumCapacity)
|
|
{
|
|
ensureCapacity_unsynchronized(minimumCapacity);
|
|
}
|
|
|
|
/**
|
|
* Set the length of this StringBuffer. If the new length is greater than
|
|
* the current length, all the new characters are set to '\0'. If the new
|
|
* length is less than the current length, the first <code>newLength</code>
|
|
* characters of the old array will be preserved, and the remaining
|
|
* characters are truncated.
|
|
*
|
|
* @param newLength the new length
|
|
* @throws IndexOutOfBoundsException if the new length is negative
|
|
* (while unspecified, this is a StringIndexOutOfBoundsException)
|
|
* @see #length()
|
|
*/
|
|
public synchronized void setLength(int newLength)
|
|
{
|
|
super.setLength(newLength);
|
|
}
|
|
|
|
/**
|
|
* Get the character at the specified index.
|
|
*
|
|
* @param index the index of the character to get, starting at 0
|
|
* @return the character at the specified index
|
|
* @throws IndexOutOfBoundsException if index is negative or >= length()
|
|
* (while unspecified, this is a StringIndexOutOfBoundsException)
|
|
*/
|
|
public synchronized char charAt(int index)
|
|
{
|
|
return super.charAt(index);
|
|
}
|
|
|
|
/**
|
|
* Get the code point at the specified index. This is like #charAt(int),
|
|
* but if the character is the start of a surrogate pair, and the
|
|
* following character completes the pair, then the corresponding
|
|
* supplementary code point is returned.
|
|
* @param index the index of the codepoint to get, starting at 0
|
|
* @return the codepoint at the specified index
|
|
* @throws IndexOutOfBoundsException if index is negative or >= length()
|
|
* @since 1.5
|
|
*/
|
|
public synchronized int codePointAt(int index)
|
|
{
|
|
return super.codePointAt(index);
|
|
}
|
|
|
|
/**
|
|
* Get the code point before the specified index. This is like
|
|
* #codePointAt(int), but checks the characters at <code>index-1</code> and
|
|
* <code>index-2</code> to see if they form a supplementary code point.
|
|
* @param index the index just past the codepoint to get, starting at 0
|
|
* @return the codepoint at the specified index
|
|
* @throws IndexOutOfBoundsException if index is negative or >= length()
|
|
* @since 1.5
|
|
*/
|
|
public synchronized int codePointBefore(int index)
|
|
{
|
|
return super.codePointBefore(index);
|
|
}
|
|
|
|
/**
|
|
* Get the specified array of characters. <code>srcOffset - srcEnd</code>
|
|
* characters will be copied into the array you pass in.
|
|
*
|
|
* @param srcOffset the index to start copying from (inclusive)
|
|
* @param srcEnd the index to stop copying from (exclusive)
|
|
* @param dst the array to copy into
|
|
* @param dstOffset the index to start copying into
|
|
* @throws NullPointerException if dst is null
|
|
* @throws IndexOutOfBoundsException if any source or target indices are
|
|
* out of range (while unspecified, source problems cause a
|
|
* StringIndexOutOfBoundsException, and dest problems cause an
|
|
* ArrayIndexOutOfBoundsException)
|
|
* @see System#arraycopy(Object, int, Object, int, int)
|
|
*/
|
|
public synchronized void getChars(int srcOffset, int srcEnd,
|
|
char[] dst, int dstOffset)
|
|
{
|
|
super.getChars(srcOffset, srcEnd, dst, dstOffset);
|
|
}
|
|
|
|
/**
|
|
* Set the character at the specified index.
|
|
*
|
|
* @param index the index of the character to set starting at 0
|
|
* @param ch the value to set that character to
|
|
* @throws IndexOutOfBoundsException if index is negative or >= length()
|
|
* (while unspecified, this is a StringIndexOutOfBoundsException)
|
|
*/
|
|
public synchronized void setCharAt(int index, char ch)
|
|
{
|
|
super.setCharAt(index, ch);
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> value of the argument to this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param obj the <code>Object</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see String#valueOf(Object)
|
|
* @see #append(String)
|
|
*/
|
|
public synchronized StringBuffer append(Object obj)
|
|
{
|
|
super.append(obj);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> to this <code>StringBuffer</code>. If
|
|
* str is null, the String "null" is appended.
|
|
*
|
|
* @param str the <code>String</code> to append
|
|
* @return this <code>StringBuffer</code>
|
|
*/
|
|
public synchronized StringBuffer append(String str)
|
|
{
|
|
super.append(str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>StringBuffer</code> value of the argument to this
|
|
* <code>StringBuffer</code>. This behaves the same as
|
|
* <code>append((Object) stringBuffer)</code>, except it is more efficient.
|
|
*
|
|
* @param stringBuffer the <code>StringBuffer</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see #append(Object)
|
|
* @since 1.4
|
|
*/
|
|
public synchronized StringBuffer append(StringBuffer stringBuffer)
|
|
{
|
|
super.append(stringBuffer);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>char</code> array to this <code>StringBuffer</code>.
|
|
* This is similar (but more efficient) than
|
|
* <code>append(new String(data))</code>, except in the case of null.
|
|
*
|
|
* @param data the <code>char[]</code> to append
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws NullPointerException if <code>str</code> is <code>null</code>
|
|
* @see #append(char[], int, int)
|
|
*/
|
|
public synchronized StringBuffer append(char[] data)
|
|
{
|
|
super.append(data, 0, data.length);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append part of the <code>char</code> array to this
|
|
* <code>StringBuffer</code>. This is similar (but more efficient) than
|
|
* <code>append(new String(data, offset, count))</code>, except in the case
|
|
* of null.
|
|
*
|
|
* @param data the <code>char[]</code> to append
|
|
* @param offset the start location in <code>str</code>
|
|
* @param count the number of characters to get from <code>str</code>
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws NullPointerException if <code>str</code> is <code>null</code>
|
|
* @throws IndexOutOfBoundsException if offset or count is out of range
|
|
* (while unspecified, this is a StringIndexOutOfBoundsException)
|
|
*/
|
|
public synchronized StringBuffer append(char[] data, int offset, int count)
|
|
{
|
|
super.append(data, offset, count);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> value of the argument to this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param bool the <code>boolean</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see String#valueOf(boolean)
|
|
*/
|
|
public synchronized StringBuffer append(boolean bool)
|
|
{
|
|
super.append(bool);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>char</code> to this <code>StringBuffer</code>.
|
|
*
|
|
* @param ch the <code>char</code> to append
|
|
* @return this <code>StringBuffer</code>
|
|
*/
|
|
public synchronized StringBuffer append(char ch)
|
|
{
|
|
super.append(ch);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the characters in the <code>CharSequence</code> to this
|
|
* buffer.
|
|
*
|
|
* @param seq the <code>CharSequence</code> providing the characters
|
|
* @return this <code>StringBuffer</code>
|
|
* @since 1.5
|
|
*/
|
|
public synchronized StringBuffer append(CharSequence seq)
|
|
{
|
|
super.append(seq, 0, seq.length());
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append some characters from the <code>CharSequence</code> to this
|
|
* buffer. If the argument is null, the four characters "null" are
|
|
* appended.
|
|
*
|
|
* @param seq the <code>CharSequence</code> providing the characters
|
|
* @param start the starting index
|
|
* @param end one past the final index
|
|
* @return this <code>StringBuffer</code>
|
|
* @since 1.5
|
|
*/
|
|
public synchronized StringBuffer append(CharSequence seq, int start, int end)
|
|
{
|
|
super.append(seq, start, end);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> value of the argument to this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param inum the <code>int</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see String#valueOf(int)
|
|
*/
|
|
// This is native in libgcj, for efficiency.
|
|
public synchronized StringBuffer append(int inum)
|
|
{
|
|
super.append(inum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> value of the argument to this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param lnum the <code>long</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see String#valueOf(long)
|
|
*/
|
|
public synchronized StringBuffer append(long lnum)
|
|
{
|
|
super.append(lnum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> value of the argument to this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param fnum the <code>float</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see String#valueOf(float)
|
|
*/
|
|
public synchronized StringBuffer append(float fnum)
|
|
{
|
|
super.append(fnum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the <code>String</code> value of the argument to this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param dnum the <code>double</code> to convert and append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see String#valueOf(double)
|
|
*/
|
|
public synchronized StringBuffer append(double dnum)
|
|
{
|
|
super.append(dnum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Append the code point to this <code>StringBuffer</code>.
|
|
* This is like #append(char), but will append two characters
|
|
* if a supplementary code point is given.
|
|
*
|
|
* @param code the code point to append
|
|
* @return this <code>StringBuffer</code>
|
|
* @see Character#toChars(int, char[], int)
|
|
* @since 1.5
|
|
*/
|
|
public synchronized StringBuffer appendCodePoint(int code)
|
|
{
|
|
super.appendCodePoint(code);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Delete characters from this <code>StringBuffer</code>.
|
|
* <code>delete(10, 12)</code> will delete 10 and 11, but not 12. It is
|
|
* harmless for end to be larger than length().
|
|
*
|
|
* @param start the first character to delete
|
|
* @param end the index after the last character to delete
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if start or end are out of bounds
|
|
* @since 1.2
|
|
*/
|
|
public synchronized StringBuffer delete(int start, int end)
|
|
{
|
|
// This will unshare if required.
|
|
super.delete(start, end);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Delete a character from this <code>StringBuffer</code>.
|
|
*
|
|
* @param index the index of the character to delete
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if index is out of bounds
|
|
* @since 1.2
|
|
*/
|
|
public synchronized StringBuffer deleteCharAt(int index)
|
|
{
|
|
super.deleteCharAt(index);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Replace characters between index <code>start</code> (inclusive) and
|
|
* <code>end</code> (exclusive) with <code>str</code>. If <code>end</code>
|
|
* is larger than the size of this StringBuffer, all characters after
|
|
* <code>start</code> are replaced.
|
|
*
|
|
* @param start the beginning index of characters to delete (inclusive)
|
|
* @param end the ending index of characters to delete (exclusive)
|
|
* @param str the new <code>String</code> to insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if start or end are out of bounds
|
|
* @throws NullPointerException if str is null
|
|
* @since 1.2
|
|
*/
|
|
public synchronized StringBuffer replace(int start, int end, String str)
|
|
{
|
|
super.replace(start, end, str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Creates a substring of this StringBuffer, starting at a specified index
|
|
* and ending at the end of this StringBuffer.
|
|
*
|
|
* @param beginIndex index to start substring (base 0)
|
|
* @return new String which is a substring of this StringBuffer
|
|
* @throws StringIndexOutOfBoundsException if beginIndex is out of bounds
|
|
* @see #substring(int, int)
|
|
* @since 1.2
|
|
*/
|
|
public String substring(int beginIndex)
|
|
{
|
|
return substring(beginIndex, count);
|
|
}
|
|
|
|
/**
|
|
* Creates a substring of this StringBuffer, starting at a specified index
|
|
* and ending at one character before a specified index. This is implemented
|
|
* the same as <code>substring(beginIndex, endIndex)</code>, to satisfy
|
|
* the CharSequence interface.
|
|
*
|
|
* @param beginIndex index to start at (inclusive, base 0)
|
|
* @param endIndex index to end at (exclusive)
|
|
* @return new String which is a substring of this StringBuffer
|
|
* @throws IndexOutOfBoundsException if beginIndex or endIndex is out of
|
|
* bounds
|
|
* @see #substring(int, int)
|
|
* @since 1.4
|
|
*/
|
|
public CharSequence subSequence(int beginIndex, int endIndex)
|
|
{
|
|
return substring(beginIndex, endIndex);
|
|
}
|
|
|
|
/**
|
|
* Creates a substring of this StringBuffer, starting at a specified index
|
|
* and ending at one character before a specified index.
|
|
*
|
|
* @param beginIndex index to start at (inclusive, base 0)
|
|
* @param endIndex index to end at (exclusive)
|
|
* @return new String which is a substring of this StringBuffer
|
|
* @throws StringIndexOutOfBoundsException if beginIndex or endIndex is out
|
|
* of bounds
|
|
* @since 1.2
|
|
*/
|
|
public synchronized String substring(int beginIndex, int endIndex)
|
|
{
|
|
int len = endIndex - beginIndex;
|
|
if (beginIndex < 0 || endIndex > count || endIndex < beginIndex)
|
|
throw new StringIndexOutOfBoundsException();
|
|
if (len == 0)
|
|
return "";
|
|
// Don't copy unless substring is smaller than 1/4 of the buffer.
|
|
boolean share_buffer = ((len << 2) >= value.length);
|
|
if (share_buffer)
|
|
this.shared = true;
|
|
// Package constructor avoids an array copy.
|
|
return new String(value, beginIndex, len, share_buffer);
|
|
}
|
|
|
|
/**
|
|
* Insert a subarray of the <code>char[]</code> argument into this
|
|
* <code>StringBuffer</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param str the <code>char[]</code> to insert
|
|
* @param str_offset the index in <code>str</code> to start inserting from
|
|
* @param len the number of characters to insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws NullPointerException if <code>str</code> is <code>null</code>
|
|
* @throws StringIndexOutOfBoundsException if any index is out of bounds
|
|
* @since 1.2
|
|
*/
|
|
public synchronized StringBuffer insert(int offset,
|
|
char[] str, int str_offset, int len)
|
|
{
|
|
super.insert(offset, str, str_offset, len);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> value of the argument into this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param obj the <code>Object</code> to convert and insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @exception StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see String#valueOf(Object)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, Object obj)
|
|
{
|
|
super.insert(offset, obj);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> argument into this
|
|
* <code>StringBuffer</code>. If str is null, the String "null" is used
|
|
* instead.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param str the <code>String</code> to insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, String str)
|
|
{
|
|
super.insert(offset, str);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>CharSequence</code> argument into this
|
|
* <code>StringBuffer</code>. If the sequence is null, the String
|
|
* "null" is used instead.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param sequence the <code>CharSequence</code> to insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws IndexOutOfBoundsException if offset is out of bounds
|
|
* @since 1.5
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, CharSequence sequence)
|
|
{
|
|
super.insert(offset, sequence);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert a subsequence of the <code>CharSequence</code> argument into this
|
|
* <code>StringBuffer</code>. If the sequence is null, the String
|
|
* "null" is used instead.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param sequence the <code>CharSequence</code> to insert
|
|
* @param start the starting index of the subsequence
|
|
* @param end one past the ending index of the subsequence
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws IndexOutOfBoundsException if offset, start,
|
|
* or end are out of bounds
|
|
* @since 1.5
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, CharSequence sequence,
|
|
int start, int end)
|
|
{
|
|
super.insert(offset, sequence, start, end);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>char[]</code> argument into this
|
|
* <code>StringBuffer</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param data the <code>char[]</code> to insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws NullPointerException if <code>data</code> is <code>null</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see #insert(int, char[], int, int)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, char[] data)
|
|
{
|
|
super.insert(offset, data, 0, data.length);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> value of the argument into this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param bool the <code>boolean</code> to convert and insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see String#valueOf(boolean)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, boolean bool)
|
|
{
|
|
super.insert(offset, bool);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>char</code> argument into this <code>StringBuffer</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param ch the <code>char</code> to insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, char ch)
|
|
{
|
|
super.insert(offset, ch);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> value of the argument into this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param inum the <code>int</code> to convert and insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see String#valueOf(int)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, int inum)
|
|
{
|
|
super.insert(offset, inum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> value of the argument into this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param lnum the <code>long</code> to convert and insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see String#valueOf(long)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, long lnum)
|
|
{
|
|
super.insert(offset, lnum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> value of the argument into this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param fnum the <code>float</code> to convert and insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see String#valueOf(float)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, float fnum)
|
|
{
|
|
super.insert(offset, fnum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Insert the <code>String</code> value of the argument into this
|
|
* <code>StringBuffer</code>. Uses <code>String.valueOf()</code> to convert
|
|
* to <code>String</code>.
|
|
*
|
|
* @param offset the place to insert in this buffer
|
|
* @param dnum the <code>double</code> to convert and insert
|
|
* @return this <code>StringBuffer</code>
|
|
* @throws StringIndexOutOfBoundsException if offset is out of bounds
|
|
* @see String#valueOf(double)
|
|
*/
|
|
public synchronized StringBuffer insert(int offset, double dnum)
|
|
{
|
|
super.insert(offset, dnum);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Finds the first instance of a substring in this StringBuffer.
|
|
*
|
|
* @param str String to find
|
|
* @return location (base 0) of the String, or -1 if not found
|
|
* @throws NullPointerException if str is null
|
|
* @see #indexOf(String, int)
|
|
* @since 1.4
|
|
*/
|
|
public synchronized int indexOf(String str)
|
|
{
|
|
return super.indexOf(str, 0);
|
|
}
|
|
|
|
/**
|
|
* Finds the first instance of a String in this StringBuffer, starting at
|
|
* a given index. If starting index is less than 0, the search starts at
|
|
* the beginning of this String. If the starting index is greater than the
|
|
* length of this String, or the substring is not found, -1 is returned.
|
|
*
|
|
* @param str String to find
|
|
* @param fromIndex index to start the search
|
|
* @return location (base 0) of the String, or -1 if not found
|
|
* @throws NullPointerException if str is null
|
|
* @since 1.4
|
|
*/
|
|
public synchronized int indexOf(String str, int fromIndex)
|
|
{
|
|
return super.indexOf(str, fromIndex);
|
|
}
|
|
|
|
/**
|
|
* Finds the last instance of a substring in this StringBuffer.
|
|
*
|
|
* @param str String to find
|
|
* @return location (base 0) of the String, or -1 if not found
|
|
* @throws NullPointerException if str is null
|
|
* @see #lastIndexOf(String, int)
|
|
* @since 1.4
|
|
*/
|
|
public synchronized int lastIndexOf(String str)
|
|
{
|
|
return super.lastIndexOf(str, count - str.count);
|
|
}
|
|
|
|
/**
|
|
* Finds the last instance of a String in this StringBuffer, starting at a
|
|
* given index. If starting index is greater than the maximum valid index,
|
|
* then the search begins at the end of this String. If the starting index
|
|
* is less than zero, or the substring is not found, -1 is returned.
|
|
*
|
|
* @param str String to find
|
|
* @param fromIndex index to start the search
|
|
* @return location (base 0) of the String, or -1 if not found
|
|
* @throws NullPointerException if str is null
|
|
* @since 1.4
|
|
*/
|
|
public synchronized int lastIndexOf(String str, int fromIndex)
|
|
{
|
|
return super.lastIndexOf(str, fromIndex);
|
|
}
|
|
|
|
/**
|
|
* Reverse the characters in this StringBuffer. The same sequence of
|
|
* characters exists, but in the reverse index ordering.
|
|
*
|
|
* @return this <code>StringBuffer</code>
|
|
*/
|
|
public synchronized StringBuffer reverse()
|
|
{
|
|
super.reverse();
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Convert this <code>StringBuffer</code> to a <code>String</code>. The
|
|
* String is composed of the characters currently in this StringBuffer. Note
|
|
* that the result is a copy, and that future modifications to this buffer
|
|
* do not affect the String.
|
|
*
|
|
* @return the characters in this StringBuffer
|
|
*/
|
|
public String toString()
|
|
{
|
|
// The string will set this.shared = true.
|
|
return new String(this);
|
|
}
|
|
|
|
/**
|
|
* This may reduce the amount of memory used by the StringBuffer,
|
|
* by resizing the internal array to remove unused space. However,
|
|
* this method is not required to resize, so this behavior cannot
|
|
* be relied upon.
|
|
* @since 1.5
|
|
*/
|
|
public synchronized void trimToSize()
|
|
{
|
|
super.trimToSize();
|
|
}
|
|
|
|
/**
|
|
* Return the number of code points between two indices in the
|
|
* <code>StringBuffer</code>. An unpaired surrogate counts as a
|
|
* code point for this purpose. Characters outside the indicated
|
|
* range are not examined, even if the range ends in the middle of a
|
|
* surrogate pair.
|
|
*
|
|
* @param start the starting index
|
|
* @param end one past the ending index
|
|
* @return the number of code points
|
|
* @since 1.5
|
|
*/
|
|
public synchronized int codePointCount(int start, int end)
|
|
{
|
|
return super.codePointCount(start, end);
|
|
}
|
|
|
|
/**
|
|
* Starting at the given index, this counts forward by the indicated
|
|
* number of code points, and then returns the resulting index. An
|
|
* unpaired surrogate counts as a single code point for this
|
|
* purpose.
|
|
*
|
|
* @param start the starting index
|
|
* @param codePoints the number of code points
|
|
* @return the resulting index
|
|
* @since 1.5
|
|
*/
|
|
public synchronized int offsetByCodePoints(int start, int codePoints)
|
|
{
|
|
return super.offsetByCodePoints(start, codePoints);
|
|
}
|
|
|
|
/**
|
|
* An unsynchronized version of ensureCapacity, used internally to avoid
|
|
* the cost of a second lock on the same object. This also has the side
|
|
* effect of duplicating the array, if it was shared (to form copy-on-write
|
|
* semantics).
|
|
*
|
|
* @param minimumCapacity the minimum capacity
|
|
* @see #ensureCapacity(int)
|
|
*/
|
|
void ensureCapacity_unsynchronized(int minimumCapacity)
|
|
{
|
|
if (shared || minimumCapacity > value.length)
|
|
{
|
|
// We don't want to make a larger vector when `shared' is
|
|
// set. If we do, then setLength becomes very inefficient
|
|
// when repeatedly reusing a StringBuffer in a loop.
|
|
int max = (minimumCapacity > value.length
|
|
? value.length * 2 + 2
|
|
: value.length);
|
|
minimumCapacity = (minimumCapacity < max ? max : minimumCapacity);
|
|
char[] nb = new char[minimumCapacity];
|
|
System.arraycopy(value, 0, nb, 0, count);
|
|
value = nb;
|
|
shared = false;
|
|
}
|
|
}
|
|
|
|
}
|