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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Why string objects are immutable in java?

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What data type is true or false?

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Differentiate between the constructors and methods in java?

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what is difference between front controller and action servlet?

2 Answers  

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What is string array?

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Hey buddy.. can you please tell me about the use of marker interface? And is there any link between marker interface and factory methods? Thanks in advance.

2 Answers  

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what is request dispatcher and how does it work?

2 Answers   CTS,

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Explain cookies?

2 Answers   Canon,

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Why arraylist is used in java?

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Why is stringbuffer not immutable?

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Can an anonymous class be declared as implementing an interface and extending a class in java programming?

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