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public class Zaehler extends Thread {
	private int zahl;
	public Zaehler (String n, int z) {
		super(n);
		zahl=z;
	}
	
	public void run() {
		for (int i=0;i<zahl;i++) {
			System.out.println ("Thread "+getName()+": ist bei "+i);
			try {
				this.sleep(100);
			}
			catch (InterruptedException ix) {
				
			}
		}
	}
}

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Zaehler z1 = new Zaehler("Nummer 1", 3);
		Zaehler z2 = new Zaehler("Nummer 2", 6);
		z1.start();
		z2.start();
		while (z1.isAlive() && z2.isAlive()) {
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		System.out.println("Zählen beendet!");
	}

}