Java Thread wait() => blocked?

Question

According to Java thread state info calling wait() will result a thread to go in BLOCKED state. However this piece of code will result (after being called) in a Thread in WAITING State.

class bThread extends Thread {
    public synchronized void run() {
        try {
            wait();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

Have I got something wrong? Can anybody explain this behaviour to me? Any help would be appreciated!

Answer 1

The thread is WAITING until it is notified. Then it becomes BLOCKED trying to reenter the synchronized region until all other threads have left.

Relevant parts from the link you posted (about WAITING):

For example, a thread that has called Object.wait() on an object is waiting for another thread to call Object.notify() or Object.notifyAll() on that object.

and (about BLOCKED):

A thread in the blocked state is waiting for a monitor lock to [...] reenter a synchronized block/method after calling Object.wait.

The last part occurs when the thread tries to return from wait(), but not until then.