What is an immutable class? How to create an immutable class?
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What are the differences between wait() and sleep()?
How do you check if a string contains only numeric digits?
When should you use arraylist and when should you use linkedlist?
why are there separate wait and sleep methods? : Java thread
Hi Friends, I am new to java. Can u explain about thread concept.How i know one thread is locked, and how can i force or acquire another thread for lock . Finally how to know thread is released from lock. Explain types of lock(like method level and block level) in thread.
what is polymorphism?
What is the difference between length and length() method in java?
When a byte datatype is used?
What is square root in java?
Why do we need wrapper class?
What is a flag value?
Can you inherit a constructor java?