Difference between String and StringBuffer/StringBuilder in Java

Difference between String and StringBuffer/StringBuilder in Java

Each and every programmer in java are totally got confused about the basic difference between String,StringBuffer and StringBulder.

1.String

• String is immutable i.e- the value assigned to a string can't be changed without assigning it
• ex:- String s = "hai"; s.concat(" i am a boy"); System.out.println(s);
• Output is "hai". not "hai i am a boy".

2.String Buffer

• String Buffer is Synchronized.

• It's thread safe.

• mutable i.e- value can be changed.

3.String Builder

• String Bulder is not Synchronized.

• mutable i.e- value can be changed.