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;
}
}