用java编写一个电子时钟程序。每秒显示一次当前的时间。

Question

如题所述

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import java.util.*;
import java.util.concurrent.*;

public class Clock extends JFrame implements Runnable {
private JLabel label = new JLabel();

public Clock() {
this("Q6");
label.setFont(new Font("Dialog", Font.BOLD, 72));
flush();
this.add(label);
this.pack();
ExecutorService exec = Executors.newCachedThreadPool();
exec.execute(this);
}

public static void main(String[] args) {
Clock c = new Clock();
c.setVisible(true);
}

private void flush() {
String strTime = String.format("%tT", new Date());
label.setText(strTime);
}

public void run() {
while(true) {
flush();
try {
Thread.sleep(1000);
} catch(Exception e) {}
}
}
}

Answer 2

启动一个线程，每秒获取一次系统当前时间

Answer 3

http://hi.baidu.com/xun1573/blog/item/456ac28b0a3f4a789f2fb439.html
看一下这个本回答被提问者采纳

Answer 4

获取本地时间