Java: waiting on synchronized block, who goes first?

Question

This question is inspired by this other question.

If multiple threads are waiting on a synchronized block, and the lock becomes available, who goes firs

Answer 1

for your second Question

one of them is chosen to be awakened. The choice is arbitrary and occurs at the discretion of the implementation. A thread waits on an object's monitor by calling one of the wait methods.

From http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Object.html#notify()