Penjadwalan Round-Robin dengan Java

public class Scheduler extends Thread{
    public Scheduler(){
        timeSlice = DEFAULT_TIME_SLICE;
        queue = new Circularlist();
    }
    public Scheduler(int quantum){
        timeSlice = quantum;
        queue = new Circularlist();
    }
    public addThread(Thread t) {
        t.setPriority(2);
        queue.additem(t);
    }
    private void schedulerSleep() {
        try{
            Thread.sleep(timeSlice );
        } catch (InterruptedException e){};
    }
    public void run(){
        Thread current;
        This.setpriority(6);
        While (true) {
        // get the next thread
            current = (Thread)qeue.getnext();
            if ( (current != null) && (current.isAlive()) ){
                current.setPriority(4);
                schedulerSleep();
                current.setPriority(2)
            }
        }
    }
    private CircularList queue;
    private int timeSlice;
    private static final int DEFAULT_TIME_SLICE = 1000;
}
public class TesScheduler{
    public static void main()String args[]) {
        Thread.currentThread().setpriority(Thread.Max_Priority);
        Schedular CPUSchedular = new Scheduler ();
        CPUSchedular.start()
        TestThread t1 = new TestThread("Thread 1");
        t1.start()
        CpuSchedular.addThread(t1);
        TestThread t2 = new TestThread("Thread 2");
        t2.start()
        CpuSchedular.addThread(t2);
        TestThread t3 = new TestThread("Thread 1");
        t3.start()
        CpuSchedular.addThread(t3);
    }
}