What is the method to expand and collapse nodes in a jtree?
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Difference between abstract and concrete class ?
When we r go to abstract class and when we go to Interface? i have confusion this question while in interview plz clarify
What is the multilevel inheritance. and also give the Example of it ?
what is mutual exclusion? : Java thread
What is api in java?
What is the base class of all classes?
Explain constructors and types of constructors in java.
How do generics work?
JVM responsibility?
How do you check if a string contains only numeric digits?
What is remote method invocation (rmi)?
What is better - 'bit-shift a value' or 'multiply by 2'?