What is the importance of hashcode() and equals() methods?
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Is simpledateformat safe to use in the multithreaded program?
Is string a wrapper class?
Why runnable interface is used in java?
what is private constructor?what are the uses of writing private constructor in our program?
What is command line argument in java?
Can a boolean be null java?
What are the types of methods in java?
what is a package?
What is the final blank variable?
What is the difference between a static and a non-static inner class in java programming?
What are the differences between graph and tree?
Explain which of the following methods releases the lock when yield(), join(),sleep(),wait(),notify(), notifyall() methods are executed?