Main thread wait for other threads

Question

After seaching a lot and not finding a concrete answer

If I have two threads started:

Thread t1 = new Thread();
Thread t2 = new Thread();

t1.start();
t2.start();

After starting the threads I need the main thread to wait for these two thread to finish before printing the final result

How can I make the main thread wait for both t1 and t2?

A plain wait() would be enough?

Answer 1

Add

t1.join();
t2.join();

in your thread which should wait till t1 and t2 will finish their tasks (in your case call it from your main thread).