What is variable and example?
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Why do we use return statement?
Difference between this() and super() ?
Can a class have an interface?
how does the run() method in runnable work? : Java thread
Explain thread life cycle in java?
Can we inherit inner class?
Why do we need to override equals() and hascode() method of object class?
Why is static used?
What are the difference between string, string builder, and string buffer in java?
Can we define constructor in inner class?
What are different data types?
write a progam hashmap & hashtable?