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immutable

 
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How can we make a class immutable?
 
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As I known,these are some rules for making a class immutable:
1. Don't provide any methods that modify the object (known as mutators).
2. Ensure that no methods may be overridden.
3. Make all fields final.
4. Make all fields private.
5. Ensure exclusive access to any mutable components.

[ July 25, 2007: Message edited by: Shoumin Li ]
[ July 25, 2007: Message edited by: Shoumin Li ]
 
Madhu Sudhana
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thanks for the reply.....

Can I assume that String class is following the rules you have mentioned?

or String class has some extra features............?
 
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Originally posted by Madhusudhana E:
Can I assume that String class is following the rules you have mentioned?



Even better: looking at the javadocs of the String class you can find out for sure if these conditions are met.
 
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