线程的关闭

<span style="font-size:18px;">public class TestThread {</span><span style="font-size:18px;">public static void main(String args[]) {Runner4 r = new Runner4();Thread t = new Thread(r);t.start();for(int i=0;i<50;i++) {if(i%10==0) {System.out.println("in thread main i="+i);}System.out.println("Thread main is over");r.shutDown();}}}class Runner4 implements Runnable {boolean flag=true;@Overridepublic void run() {// TODO Auto-generated method stubint i=0;while(flag==true) {System.out.println(" "+i++);}}public void shutDown() {flag=false;}}</span>