What is difference between hashset and hashmap?
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How a class can implement an interface?
Can we override private method?
How do you create a null object?
What does the append?
Why java is called not pure object oriented language?
What are event-delegation model and event-inheritance model? Which is best?
Why Java is not pure Object Oriented language?
What is meant by class loader and how many types are there?
What is the basic of java?
What is main function purpose?
What is the use of 'super' keyword inside a constructor?
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How do you avoid global variables?