Re: thread testing done flag

Or, the following works.., but can it cause a problem?

import java.util.concurrent.atomic.AtomicBoolean;

public class Test {

    private AtomicBoolean done = new AtomicBoolean(false);

    class TestThread extends Thread {

        private String name;

        private AtomicBoolean done;

        public TestThread(final String n, final AtomicBoolean d) {
            name = n;
            done = d;
        }

        public void run() {
            while (true) {
                System.out.println(name);
                try {
                    Thread.currentThread().sleep(100);
                } catch (Exception ex) {
                    System.out.println("" + ex);
                    return;
                }
                if (done.get()) {
                    return;
                }
            }
        }
    }
    public static void main(String[] args) throws Exception {
        Test t = new Test();
        t.run();
    }

    public void run() {
        TestThread ta = new TestThread("a", done);
        TestThread tb = new TestThread("b", done);
        ta.start();
        tb.start();
        for (int i = 0; i < 10; ++i) {
            System.out.println("main: " + i);
            try {
                Thread.currentThread().sleep(100);
            } catch (Exception ex) {
                System.out.println("" + ex);
                break;
            }
        }
        done.set(true);
        try {
            ta.join();
            tb.join();
        } catch (Exception ex) {
            System.out.println("" + ex);
        }
    }
}