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a doubt regarding course

 
Greenhorn
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what is Observer and Observable.
is it a part of scjp exam
 
Ranch Hand
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Observer and Obsxervable are asked in exams
only a basic idea is required
Observable is a class and Observer is an interface
try javadocs for details
Cherry
 
shilpa gupta
Greenhorn
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thanx cherry.
one more doubt
what is internationalization.& which java.util classes support it?
please help me with this one also
 
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