String vs. StringBuffer class

What is StringBuffer class?

- StringBuffer class is same as String class except that it is mutable.

- It allows change and does not create a new instance on change of value.

- It consumes less memory when you concat strings.

- It is used for creating mutable string.

String vs. StringBuffer class.

String	StringBuffer
It is immutable.	It is mutable.
It is slow.	It is fast.
It consumes more memory.	It consumes less memory.
It overrides the equals() method of the object class.	It does not override the equals() method of the object class.