java.lang
Class StringBuffer

java.lang.Object
  |
  +--java.lang.StringBuffer
Constructor Summary
StringBuffer()
          Constructs a string buffer with no characters in it and an initial capacity of 16 characters.
StringBuffer(String str)
          Constructs a string buffer so that it represents the same sequence of characters as the string argument; in other words, the initial contents of the string buffer is a copy of the argument string.
 
Method Summary
 StringBuffer append(String str)
          Appends the string to this string buffer.
 char charAt(int index)
          The specified character of the sequence currently represented by the string buffer, as indicated by the index argument, is returned.
 StringBuffer delete(int start, int end)
          Removes the characters in a substring of this StringBuffer.
 StringBuffer deleteCharAt(int index)
          Removes the character at the specified position in this StringBuffer (shortening the StringBuffer by one character).
 StringBuffer insert(int offset, String str)
          Inserts the string into this string buffer.
 int length()
          Returns the length (character count) of this string buffer.
 StringBuffer replace(int start, int end, String str)
          Replaces the characters in a substring of this StringBuffer with characters in the specified String.
 StringBuffer reverse()
          The character sequence contained in this string buffer is replaced by the reverse of the sequence.
 void setCharAt(int index, char ch)
          The character at the specified index of this string buffer is set to ch.
 String substring(int start, int end)
          Returns a new String that contains a subsequence of characters currently contained in this StringBuffer.