public class WorkerThread implements Runnable {
	private int workerNumber;

	WorkerThread(int number) {
		workerNumber = number;
	}

	public void run() {
		for (int i=0;i<=100;i+=20) {
			// Perform some work ...
			System.out.println("Worker number: " + workerNumber + ", percent complete: " + i );
			try {
				Thread.sleep((int)(Math.random() * 1000));
			} catch (InterruptedException e) {
			}
		}
	}
}