wait until all threads finish their work in java

Question

I\'m writing an application that has 5 threads that get some information from web simultaneously and fill 5 different fields in a buffer class.
I need to validate buffer

Answer 1

I created a small helper method to wait for a few Threads to finish:

public static void waitForThreadsToFinish(Thread... threads) {
        try {
            for (Thread thread : threads) {
                thread.join();
            }
        }
        catch (InterruptedException e) {
            e.printStackTrace();
        }
    }