定时器

 Java代码

package cn.itcast;

import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

public class TraditionalTimerTest {

private static int count = 0;
public static void main(String[] args) {
// 从程序运行10s之后，每隔3s打印一次bombing!
new Timer().schedule(new TimerTask() {

@Override
public void run() {
System.out.println("bombing!");

}
}, 10000, 3000);

// 隔2s，4s交替打印bombing!
class MyTimerTask extends TimerTask{

@Override
public void run() {
count = (count + 1) % 2;
System.out.println("bombing!");
new Timer().schedule(/*new TimerTask() {

 @Override
 public void run() {
 System.out.println("bombing!");
 }
 }*/new MyTimerTask(),2000 + 2000*count);
}
}

new Timer().schedule(new MyTimerTask(), 2000);

// 打印时间用
while(true){
System.out.println(new Date().getSeconds());
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}