What is collection class in java?
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What is the difference between abstract classes and interfaces?
Which class represents the socket that both the client and server use to communicate with each other?
Marker interface means , interface which has no methods.Then what is the necessity of its usage.I read "it tells the compiler that it should be treated differently ". "It is used to store state of an object". But still am not clear.Please explain clearly.
What are advantages and disadvantages of OOPs?
we know that every java prog must follows OOPS Principles. Anybody can answer, HOW THE FOLLOWING PROGRAM FOLLOWS OOPS CONCEPTS i.e, Inheritance,Polymarphism,Encapsulation? class a{ public static void main(String args[]){ System.out.println("Hello World"); } }
Why string objects are immutable in java?
What is the purpose of having the concept of overloading?
What are the two types of exceptions in java? Which are the differences between them?
What is the use of volatile in java?
What is difference between core java and java ee?
What is toarray method in java?
What is io stream in java?