What is singleton math?
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What are the two basic ways in which classes that can be run as threads may be defined?
Can we use return in constructor?
Why do we need singleton class?
What is the USE of Null interfaces ??...if thers nothing inside these interfaces how are they used and WHy are they used ???? No 1 has given a proper description yet
what is optional in java 8?
What is the meaning of find and replace?
In multi-threading how can we ensure that a resource isn't used by multiple threads simultaneously?
Explain when we should make an instance variable private.
Can a class have multiple superclasses?
Are global variables initialized to zero?
What is encapsulation? Elaborate with example?
I have a Arraylist object, it has duplecate values also. Now question is i want delete duplecate data in that objet with out using Set?