Java——线程正常停止

public class Test {public static void main(String args[]){Runner r = new Runner();       Thread t = new Thread(r);        t.start();        for(int i=0;i<100000;i++){        if(i%10000==0 & i>0)        System.out.println("in thread main i=" + i);        }        System.out.println("Thread main is over");        r.shutDown();        //t.stop();    }}class Runner implements Runnable {  private boolean flag=true;  public void run() {int i = 0;while (flag==true) {System.out.print(" " + i++);}}  public void shutDown() {flag = false;  }}