Synchronization

[Rohit Soni]

If in a class two synchronized method are defined.Two threads are created of the class. If thread1 has acquired a lock on method1 and at the same time thread2 is trying to access the method2 then will it be able to acquire lock on the method2 or thread2 has to wait until thread1 releases the lock on method1.

[Ernest Friedman-Hill]

Hi,

Welcome to JavaRanch!

The answers depend on what you mean exactly by "Two threads are created of the class". If the two threads share a single object of the class, then yes, one has to wait for the other. But if there are two instances of this class, and each thread has its own instance (or is its own instance, if you meant that the class was a subclass of Thread) then they will not interfere, and each will run independently.

[Rohit Soni]

Thank you for the reply.It cleared my doubt.
I need one more help from you.
Can you tell by giving one example by creating class and synchronized method and thread trying to access those synchronized method, then it will be more easy to understand.

[Peter Curila]

See "Synchronizing Threads" in Java tutorial http://java.sun.com/docs/books/tutorial/essential/threads/synchronization.html