Which oo concept is achieved by using overloading and overriding?

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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?

3 Answers  

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Is set thread safe java?

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Is java programming easy?

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Explain what access modifiers can be used for variables?

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What are sets in java?

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What are other modifiers?

2 Answers   Wipro,

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What is bytecode verifier?

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Can we create a constructor in abstract class?

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What primitive Java types? Howmany are they and what are their names?

3 Answers  

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How do you remove all elements from an arraylist in java?

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Is hashset sorted in java?

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