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How to make a Immutable Object?

 
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String is a immutable Object?
similarly Can we make an immutable Object in java ?

I have read that we can make a immutable Object without providing any setter methods ?? Is this true ?

If there are no setter methods on to our Object then how can we set data initially? Is this possible if i make the setter methods as final??
 
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This question has been discussed many times before, try searching this forum. I have found this and this for you .
 
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another useful link i found earlier:How to create Immutable class
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