If i want to write something that waits for more then one thing

Question

how do i do that?
if it's for one thing i'll write:
sinchronized(a){
while (true){
wait();
my_code();
}

Answer 1

He's not saying he wants to wait for multiple
conditions. Unless I just don't understand what he's
saying (real possibility there.):) It sounded to me like he wanted to wait for multiple things to happen.
CountDownLatch works fine for waiting on multiple
threads. If one thread wants to force the await() to
end, it can force the latch count to zero. Any thread
can also call interrupt() on the waiting thread (as
long as it has a reference to the thread object.)A CountdownLatch set to one can also be used to wait for one of a set of events to occur. Of course you'd need further information to determine which event it was.
The kinds of "events" can influence the shape of the solution here. Eg if you're interested in muiltiple I/O events then you need to use an I/O framework that supports a select-style operation.