?????????????????д?????????????????Runnable??????????????￡?????????????????Thread?????????滻??????
public class SimpleThread extends Thread {
private int countDown = 5;
private static int threadCount = 0;
public SimpleThread(){
super(Integer.toString(++threadCount));
start();
}
public String toString(){
return "#" + getName() + "(" + countDown + ")";
}
public void run() {
while(true){
System.out.println(this);
if(--countDown==0)return;
}
}
public static void main(String[] args) {
for(int i = 0;i<3;i++){
new SimpleThread();
}
}
}

???????????SimpleThread()??????????ι?????super(Integer.toString(++threadCount))?????????????????????????CPU?????

??????????д??start()????????????е????????????????????????????????????
???????????B??????????????е????????A???????????java???????????A??????????????B??????????????????????thread????????B???????????????????thread?????????????A?е??Щ??????????????????????????е?????????B???????????????????Щ?????μ?????????????????????????????Щ??????????Щ?????????????
??????????????????????????A?????final???????У?????????????start??????????????????????????????С?