How does hashset work in java?
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Why is an interface be able to extend more than one interface but a class can’t extend more than one class?
Is string is a data type?
Explain wrapper classes in java?
What is the base class of all exception classes in java?
Give me some null interfaces in java?
What is the benefit of inner classes in java?
Does java runtime require a license?
Which package is always imported by default?
I need to know about complete topic in java's collections i with an examples
Hey buddy.. can you please tell me about the use of marker interface? And is there any link between marker interface and factory methods? Thanks in advance.
What is the differences between heap and stack memory in java? Explain
Every class extends object but why it is not possible for every object to invoke clone() method. ideally protected methods should be accessible from sub classes. isn't it?