利用Thread中的sleep方法實現時鐘效果

package Test;

import java.text.SimpleDateFormat;
import java.util.Date;

public class Test18 {
	public static void main(String[] args) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Thread t1 = new Thread(new Runnable() {
			
			@Override
			public void run() {
				// TODO Auto-generated method stub
				while(true) {
					try {
						Thread.sleep(1000);
						System.out.print(sdf.format(new Date()));
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					System.out.println();
				}
			}
		});
		t1.start();
	}
}