Should a main method be compulsorily declared in all java classes?
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what is the difference between future and callable interface in java?
Which collection allows duplicate values in java?
Explain about features of local inner class?
What are the advantages of passing this into a method instead of the current class object itself?
Can we have a abstract class withought any method? What is a purspose of this?
What is difference between fail-fast and fail-safe?
Which are the two subclasses under exception class?
How many classes can any class inherit java?
Explain the difference between association, aggregation and inheritance relationships.
Can you extend more than one interface?
What is the difference between jvm and jre? What is an interface?
What is string substring?