多线程 对比定时器有什么优势

java Thread类实现定时调度，可以延迟几秒之后再执行，代码如下：

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public class ceshi {
public static void main(String[] args) throws Exception {
// run in a second
final long timeInterval = 1000;
Runnable runnable = new Runnable() {
@Override
public void run() {
while (true) {
// ------- code for task to run
System.out.println("Hello !!");
// ------- ends here
try {
Thread.sleep(timeInterval);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
Thread thread = new Thread(runnable);//线程创建
thread.start();//线程启动

}