1.模拟倒计时:
//模拟倒计时
public class TestSleep2 {
public static void main(String[] args) {
try {
tenDown();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void tenDown() throws InterruptedException {
int num=10;
while(true){
Thread.sleep(1000);
System.out.println(num--);
if(num<=0){
break;
}
}
}
}
2.打印当前系统时间并且自动更新时间
public class TestSleep2 {
public static void main(String[] args) {
//打印当前系统时间
Date startTime=new Date(System.currentTimeMillis());//获取系统当前时间
while(true){
try {
Thread.sleep(1000);//每休眠1000毫秒(一秒钟)执行
System.out.println(new SimpleDateFormat("HH:mm:ss").format(startTime));
startTime =new Date(System.currentTimeMillis());//更新当前时间
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}