Java实现的简单数字时钟功能示例

import javax.swing.JFrame;import javax.swing.JPanel;import java.awt.BorderLayout;import javax.swing.JLabel;import java.awt.Font;import java.text.SimpleDateFormat;import java.util.Date;public class Time extends JFrame implements Runnable{  /**   *   */  private static final long serialVersionUID = 1L;  private JLabel date;  private JLabel time;  public Time() {    //初始化图形界面    this.setVisible(true);    this.setTitle("数字时钟");    this.setSize(282, 176);    this.setLocation(200, 200);    this.setResizable(true);    JPanel panel = new JPanel();    getContentPane().add(panel, BorderLayout.CENTER);    panel.setLayout(null);    //时间    time = new JLabel();    time.setBounds(31, 54, 196, 59);    time.setFont(new Font("Arial", Font.PLAIN, 50));    panel.add(time);    //日期    date = new JLabel();    date.setFont(new Font("微软雅黑", Font.PLAIN, 13));    date.setBounds(47, 10, 180, 22);    panel.add(date);  }  //用一个线程来更新时间     public void run() {     while(true){     try{       date.setText(new SimpleDateFormat("yyyy 年 MM 月 dd 日  EEEE").format(new Date()));       time.setText(new SimpleDateFormat("HH:mm:ss").format(new Date()));     }catch(Throwable t){     t.printStackTrace();     }     }  }  public static void main(String[] args) {    new Thread(new Time()).start();  }}