1.如果需求简单的情况下，比如单线程下可以直接使用while循环配合Thread.sleep(1000)来暂停一秒
这里还是要对sleep有个认识，sleep的时候并没有释放任何资源，占用着CPU睡觉，睡完继续当前线程的执行
2.如果需要并发定时处理的任务有多个，sleep就不太适用了。ScheduledExecutorService 不错的选择示例代码：
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class TestXunHuan implements Runnable{
public static void main(String[] args) throws InterruptedException {
TestXunHuan txh = new TestXunHuan();
ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
scheduler.scheduleWithFixedDelay(new Runner(), 0, 2, TimeUnit.SECONDS);
scheduler.scheduleWithFixedDelay(txh, 0, 1, TimeUnit.SECONDS);
}
@Override
public void run() {
System.out.println("==============HELLO,METHOD IN TestXunHuan!");
}
}
class Runner implements Runnable {
public void run() {
System.out.println("########HELLO,METHOD IN RUNNER!");
}
}
打印信息：
########HELLO,METHOD IN RUNNER!
==============HELLO,METHOD IN TestXunHuan!
==============HELLO,METHOD IN TestXunHuan!
########HELLO,METHOD IN RUNNER!
==============HELLO,METHOD IN TestXunHuan!
==============HELLO,METHOD IN TestXunHuan!