String Class Vs String Buffer

String Class Vs String Buffer

String Class

• Immutable.
• Object length Fixed.
• Slow and consumes more memory during Concatenation.
• Every time it creates new instance.
• String constant pool.   storage
• Overrides the equals() method of Object.
• Less functionality.

Example :

      String str=new String ("easynotes");

      str.concat("adda");

System.out.println( str );

Output

easynotes

String Buffer

• Mutable.
• Object length Grow able.
• Fast and consumes less memory during Concatenation.
• Heap Memory.    storage
• Doesn't override the equals() method of Object.
• More functionality.

Example :

      StringBuffer Sb= new StringBuffer ("easynotes");

      Sb.append("adda");
System.out.println( Sb );


Output
easynotes adda