Stringbuffer & Stringtokenizer in Java

  String Buffer:                             String Buffer is a peer class of String that provides much of the functionality of strings.                            The StringBuffer class in Java is the same as String class except it is mutable i.e. it can be changed . What is a mutable String?                           String that can be modified or changed is known as mutable String. StringBuffer and StringBuilder classes are used for creating mutable strings. Important methods of StringBuffer class               StringBuffer Class append() Method       StringBuffer insert() Method       StringBuffer replace() Method        StringBuffer delete() Method 1) StringBuffer Class append() Method  ...