java.lang
Class StringBuffer

java.lang.Object
  java.lang.StringBuffer

public class StringBuffer

extends Object

Constructor Summary

StringBuffer()
Constructs an empty string buffer.

StringBuffer(int length)
Constructs an empty string buffer with the specified capacity.

StringBuffer(String s)
Constructs a string buffer containing the given string.

Method Summary

StringBuffer	append(boolean b)
StringBuffer	append(char c)
StringBuffer	append(char[] chars)
StringBuffer	append(char[] chars, int offset, int length)
StringBuffer	append(double d)
StringBuffer	append(float f)
StringBuffer	append(int i)
StringBuffer	append(long l)
StringBuffer	append(Object obj)
StringBuffer	append(String s)
int	capacity()
char	charAt(int index)
StringBuffer	delete(int start, int end) Remove characters from the StringBuffer..
StringBuffer	deleteCharAt(int index)
void	ensureCapacity(int minimumCapacity) Make sure that the StringBuffer's capacity is at least as large as minimumCapacity.
void	getChars(int srcBegin, int srcEnd, char[] dest, int destBegin)
StringBuffer	insert(int index, boolean value)
StringBuffer	insert(int index, char value)
StringBuffer	insert(int index, char[] chars)
StringBuffer	insert(int index, char[] ch, int offset, int length)
StringBuffer	insert(int index, double value)
StringBuffer	insert(int index, float value)
StringBuffer	insert(int index, int value)
StringBuffer	insert(int index, long value)
StringBuffer	insert(int index, Object value)
StringBuffer	insert(int index, String string)
int	length() Returns the number of characters added to the StringBuffer.
StringBuffer	replace(int start, int end, String str)
StringBuffer	reverse()
void	setCharAt(int index, char ch)
void	setLength(int length) Set the length of the StringBuffer.
String	substring(int start) Return a new String that contains the characters in the StringBuffer from start to the end of the StringBuffer
String	substring(int start, int end) Return a new String that contains the characters in the StringBuffer from start to end-1.
String	toString() Convert the added characters to a String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode

Constructor Detail

StringBuffer

public StringBuffer()

Constructs an empty string buffer.

StringBuffer

public StringBuffer(String s)

Constructs a string buffer containing the given string.

StringBuffer

public StringBuffer(int length)

Constructs an empty string buffer with the specified capacity.

Method Detail

append

public StringBuffer append(String s)

append

public StringBuffer append(char[] chars)

append

public StringBuffer append(char[] chars,
                           int offset,
                           int length)

append

public StringBuffer append(boolean b)

append

public StringBuffer append(char c)

append

public StringBuffer append(int i)

append

public StringBuffer append(float f)

append

public StringBuffer append(double d)

append

public StringBuffer append(long l)

append

public StringBuffer append(Object obj)

length

public int length()

Returns the number of characters added to the StringBuffer.

toString

public String toString()

Convert the added characters to a String.

Overrides:

toString in class Object

Returns:

a String representing this object.

substring

public String substring(int start,
                        int end)

Return a new String that contains the characters in the StringBuffer from start to end-1.

Parameters:

start - The index of the first character - inclusive.

end - The index of the last character - exclusive

Returns:

a new String that contains the characters in the StringBuffer from start to end-1.

substring

public String substring(int start)

Return a new String that contains the characters in the StringBuffer from start to the end of the StringBuffer

Parameters:

start - The index of the first character - inclusive.

Returns:

a new String that contains the characters in the StringBuffer from start to the end of the StringBuffer

ensureCapacity

public void ensureCapacity(int minimumCapacity)

Make sure that the StringBuffer's capacity is at least as large as minimumCapacity.

setLength

public void setLength(int length)

Set the length of the StringBuffer. If the current length is less than the specified length, then sufficient null characters (0) will be appended to make it up to the specified length. If the current length is greater than the specified length then the StringBuffer is truncated to the specified length.

Parameters:

length - The new length.

setCharAt

public void setCharAt(int index,
                      char ch)

reverse

public StringBuffer reverse()

getChars

public void getChars(int srcBegin,
                     int srcEnd,
                     char[] dest,
                     int destBegin)

delete

public StringBuffer delete(int start,
                           int end)

Remove characters from the StringBuffer..

Parameters:

start - The index of the first character - inclusive.

end - The index of the last character - exclusive

Returns:

a new String that contains the characters in the StringBuffer from start to end-1.

deleteCharAt

public StringBuffer deleteCharAt(int index)

charAt

public char charAt(int index)

capacity

public int capacity()

insert

public StringBuffer insert(int index,
                           char[] ch,
                           int offset,
                           int length)

insert

public StringBuffer insert(int index,
                           String string)

insert

public StringBuffer insert(int index,
                           char[] chars)

insert

public StringBuffer insert(int index,
                           boolean value)

insert

public StringBuffer insert(int index,
                           double value)

insert

public StringBuffer insert(int index,
                           float value)

insert

public StringBuffer insert(int index,
                           int value)

insert

public StringBuffer insert(int index,
                           long value)

insert

public StringBuffer insert(int index,
                           Object value)

insert

public StringBuffer insert(int index,
                           char value)

replace

public StringBuffer replace(int start,
                            int end,
                            String str)