Hi,

I would like to know the difference in effect for calling wait() with
or without explicit object reference.

If o.wait() being called, I know that the calling thread is waiting on
object instance o. How about calling wait(), like below example ? :)

public class Test {
 public static void main(String argv[]) {
   TThread t1 = new TThread(), t2 = new TThread();
   t1.start();
   t2.start();
 }
}

class TThread extends Thread {
 public void run() {
   nowait();
 }
 public synchronized void nowait() {
   while (true) {
     try {
       wait();
     } catch (InterruptedException ie) {}
   }
 }
}