Is empty string in java?
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how can i kill thread without stop() and destroy()
What is a method declaration?
why interfaces are faster than abstract classes?
What is a subsequence of a string?
Does sprintf allocate memory?
What is an object’s lock and which object’s have locks?
What is collection api?
List some features of the abstract class.
Explain the protected field modifier?
What are the three best choices for a development environment?
Is singleton thread safe in java?
What are the difference between composition and inheritance in java?