Concurrency in Java: synchronized static methods

Question

I want to understand how locking is done on static methods in Java.

let\'s say I have the following class:

class Foo {
    private static int bar = 0         


        

Answer 1

If you read http://download.oracle.com/javase/tutorial/essential/concurrency/locksync.html.

It will tell you:

You might wonder what happens when a static synchronized method is invoked, since a static method is associated with a class, not an object. In this case, the thread acquires the intrinsic lock for the Class object associated with the class. Thus access to class's static fields is controlled by a lock that's distinct from the lock for any instance of the class.

which tells you all you need to know.