Notify & wait

Question

Here is a snip of my code :
public void start()
   setVisible(true);
   long wait_time;
   for (int counter = 0; counter < 10; counter++)
      try
         wait = false;
         wait_time = (long) ((Math.random() * 15000)+5000);
         Thread.sleep(wait_time);
         t1.start_timer();
         // some code
         Thread.wait();
         t1.stop_timer();
      catch (InterruptedException e)      {}
public void wait_finished()
   Thread.notify();
}When I run the wait_finished() method I get "non-static method wait() cannot be referenced from a static context" error message. Any ideas what Im doing wrong ?

Answer 1

You can only call wait on an object if you own that objects lock.
Try this.
Thanks for your prompt reply jboozer.
I change my code like you said, now it looks something
like this :
public void start()
setVisible(true);
long wait_time;
for (int counter = 0; counter < 10; counter++)
try
wait = false;
wait_time = (long) ((Math.random() *
m() * 15000)+5000);
Thread.sleep(wait_time);
t1.start_timer();
synchronized
wait();
// some code
t1.stop_timer();
catch (InterruptedException e)      {}
public void wait_finished()
synchronized
notify();
The above compiles ok, but when I run the code I get
an error when try to execute wait();
"java.lang.IllegalMonitorStateException : current
thread not owner " - error message
What does this mean ?
Cheers for any help.