How to Wake Up Sleeping Java Thread ?

1) MasterThread:

public class MasterThread implements Runnable {

    private final static int SLEEP_TIME = 5000; //ms
    private final Thread SLAVE;
 
    public MasterThread(Thread aSlave) {
        SLAVE = aSlave;
    }
 
    public void run() {
        System.out.println("MasterThread: run.");
        while (true) {
            System.out.println("MasterThread: call to slave.");
            SLAVE.interrupt(); //wake up
            try {
                Thread.sleep(SLEEP_TIME);
            }
            catch (InterruptedException e) {
                System.err.println("MasterThread: abnormal wake up.");
                return;
            }
        }
    }

}

2) SlaveThread:

public class SlaveThread implements Runnable {

    private final static int SLEEP_TIME = 2000; //ms

    public void run() {
        System.out.println("SlaveThread: run.");
        while (true) {
            System.out.println("SlaveThread: next iteration.");
            try {
                Thread.interrupted(); //clear
                Thread.sleep(SLEEP_TIME);
            }
            catch (InterruptedException e) {
                System.out.println("SlaveThread: wake up.");
            }
        }
    }

}

3) Main:

public class Main {
 
    public static void main(String[] args) {
        Thread slave = new Thread(new SlaveThread());
        Thread master = new Thread(new MasterThread(slave));
        slave.start();
        master.start();
        try {
            slave.join();
            master.join();
        }
        catch (InterruptedException e) {
            System.err.println(e);
        }
        System.out.println("done.");
    }

}

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