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Immutable objects....

 
Ranch Hand
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Which of the following classes produce immutable objects?
1)java.lang.Double
2)java.lang.StringBuffer
3)java.lang.Boolean
4)java.lang.Math
 
Greenhorn
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Is the answer 1,3&4?
 
Desperado
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Find the answer in:
http://java.sun.com/products/jdk/1.2/docs/api/java/lang/Number.html
[This message has been edited by Tony Alicea (edited February 10, 2000).]
 
Ranch Hand
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Answer is 1) 2) 3)
Wrapper classes and StringBuffer class are immutable.
 
Ranch Hand
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As for as i know only Wrapper classes and String are immutable, not StringBuffer.
 
Anonymous
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Saravanan:
you are right! The correct answer is only 1) & 3)
Thanks for the reply.
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