Why to use nested classes in java? (Or) what is the purpose of nested class in java?
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How many methods does cloneable interface contains?
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in a constructor what happen if u call super and this in the same class? i know that it is not possible to call both in the same one? if we call what will happen?
suppose in a class there is a code like this: { Set hs=new Hashset(); hs.add(new Emp("kathy",1000)); hs.add(new Emp("kathy",2000)); } how can u avoid the above code in your class as set won't allow duplicate objects?
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