Why must wait() always be in synchronized block

Question

We all know that in order to invoke Object.wait(), this call must be placed in synchronized block, otherwise an IllegalMonitorStateException is thrown. But what\'s t

Answer 1

When you call notify() from an object t, java notifies a particular t.wait() method. But, how does java search and notify a particular wait method.

java only looks into the synchronized block of code which was locked by object t. java cannot search the whole code to notify a particular t.wait().