What is not thread safe?
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What is difference overloading and overriding?
Why put method is used?
What is the difference between member variables initialization and assignment in a constructor?
What is the symbol for average?
What is class and object in java?
Can arraylist contain null values?
what is real-time example of runtime polymorphism and compile time polymorphism
Should a main method be compulsorily declared in all java classes?
Can we use switch statement with strings?
What is Java Annotations?
Are nested try statements are possible?
could you run the java program without main method?