What is the benefit of inner / nested classes ?
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Write code of any action class?
Why are the methods of the math class static?
Explain tree set and its features?
What are different type of access modifiers?
By what default value is an object reference declared as an instance variable?
What are the names of Component subclasses that support painting?
I have one Shopping cart application, i that i have selected some items, while clicking submit button by mistake i have clicked twice or trice, that time items are selected twice or trice. Actually i want only one copy of items but its selected twice or trice. So how can we avoid this problem?
How do I write a self declaration?
What is an immutable class?
Wha is the output from system.out.println(“hello”+null); ?
where is .equals() method and how is it different from == operation <giving some confusing implementation> Is hashing related to these?
Is static variable stored in heap?