Answer / Harikrishan Prajapati

Yes, it is a common practice to make database connections singletons in Java because they are expensive resources that should be reused instead of creating new ones unnecessarily.

What are three ways in which a thread can enter the waiting state in java programming?

1 Answers  

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What is run-time class and system class? what is their purpose?

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What is a ?

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What is string variable?

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Why are the destructors for base class and derived class called in reverse order when the program exits

1 Answers   HCL,

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Explain the difference between serializable and externalizable in java?

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What are the names of interfaces that doesn't consists of method/s ?

3 Answers  

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Can Java be said to be the complete object-oriented programming language

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What are the benefits of immutable objects?

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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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What is boolean keyword in java?

1 Answers  

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How do I get 64 bit java?

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