Here are three alternatives to scheduling a task run repeatedly without using threads:

1.Using loop construct:

  boolean temp=true; While (temp) {  for (int i = 0; i < 999999999; i++) {	 i=i;     } //  our code}

2. Using Timer and TimerTask classes (java.util.*):

  int initTime = 10000; // start after 10 seconds int Time = 5000;      // repeat every 5 seconds Timer timer = new Timer(); TimerTask task = new TimerTask() {   public void run() {     //  our code   } };timer.scheduleAtFixedRate(task, initTime, Time);

3. Using The Timer class (java.swing.*):

   int Time = 5000; // repeat every 5 seconds  Timer timer = new Timer(Time, new ActionListener() {            public void actionPerformed(ActionEvent evt) {             //  our code            }  });  timer.start();

Swing and utility timer classes provide the same functionality. The main difference between the two classes is that each java.util.Timer object creates one thread. Swing Timer class uses a single private thread to schedule ALL timers. The first variant creates a delay by keeping the CPU busy.