What do you understand by the term wrapper classes?
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Implement a stack with push (), pop() and min() in O(1) time.
Can a class be subclass of itself?
1.IN CASE OF DYNAMIC METHOD DISPATCH WHY WE USE REFERENCE VARIABLE,WE CAN USE THE DIFFERENT DEFINED OBJECT DIRECTLY TO ACCESS THE DATA MEMBER AND MEMBER FUNCTION OF THAT RESPECTIVE CLASS?WHAT IS THE MAIN FUNCTION OF "REFERENCE VARIABLE" HERE?
What is thread safe in java?
Where will it be used?
What is java basic concept?
What is difference between overloading and overriding?
How do constructors use this() and super()?
Difference between Web-based applications,Client- Server applications and Distributed applications?
What are the different data types in java?
What advantage do java's layout managers provide over traditional windowing systems?
What is thread?