package Thread.createThread; public class LiftOff implements Runnable{ protected int countDown=10;//默认countDown为10 private static int taskCount=0; private final int id=taskCount++; public LiftOff(int countDown) { this.countDown=countDown; } public LiftOff() { System.out.println("LiftOff()-------"); } public String Status(){ return "#"+id+"("+(countDown>0?countDown:"ListOff")+")"; } public void run() { while(countDown-->0){ System.out.print(Status()+" "); } System.out.println(); } }