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How do we implement immutability?

 
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Hi Ranchers,

How is immutability in java implemented?
If I m writing a code "X.java" and want to make objects of class X as immutable. How do I do that??

What's special about class "String" and Wrapper classes that makes them immutable??

Please help..
Thanks in advance.
 
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Originally posted by Mohit Jain:
What's special about class "String" and Wrapper classes that makes them immutable??



- All attributes are private
- There is no method that changes the contents of the object
- They are final. So it is impossible that a subclass changes the behaviour
 
Mohit Jain
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Thanks a lot friend.
 
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