本文实例讲述了Java实现的动态数字时钟功能。分享给大家供大家参考，具体如下：
构建：
1. Clock继承 Jframe 为运行页面
2. ClockText 测试类 创建 Clock 对象
运行效果：
具体实现：
一、Clock类
- 四个JPnal 三个放时间 最后一个放日期
- 放时间的三个JPnal 分别加入 地点 时间 按钮
- 最后一个按钮添加日期
具体实现如下：
public class Clock extends Jframe {
private JPanel jPanelBeijing;
private JPanel jPanelNewYork;
private JPanel jPanelLondom;
private JPanel jPanelDate;
private boolean BeijingThreadFlag_IsStart = true;
private boolean NewYorkThreadFlag_IsStart = true;
private boolean LondonThreadFlag_IsStart = true;
public Clock() {
// TODO Auto-generated constructor stub
jPanelBeijing = new JPanel();
jPanelNewYork = new JPanel();
jPanelLondom = new JPanel();
jPanelDate = new JPanel();
iniRelations();
iniLayout();
jframeClick();
setVisible(true);
setSize(480, 225);
setLocationRelativeTo(null);
}
private void iniLayout() {
jPanelBeijing.setLayout(new GridLayout(3, 1));
jPanelNewYork.setLayout(new GridLayout(3, 1));
jPanelLondom.setLayout(new GridLayout(3, 1));
}
// 关系
private void iniRelations() {
this.add(BorderLayout.WEST, jPanelBeijing);
this.add(BorderLayout.CENTER, jPanelNewYork);
this.add(BorderLayout.EAST, jPanelLondom);
this.add(BorderLayout.SOUTH, jPanelDate);
Font placeFont = new Font("楷体", Font.BOLD, 36);
JLabel jLabelBeijing = new JLabel("北京时间");
jLabelBeijing.setFont(placeFont);
jPanelBeijing.add(jLabelBeijing);
setWestPanel();
JLabel jLabelNewYork = new JLabel("纽约时间");
jLabelNewYork.setFont(placeFont);
jPanelNewYork.add(jLabelNewYork);
setCenterPanel();
JLabel jLabelLondon = new JLabel("伦敦时间");
jLabelLondon.setFont(placeFont);
jPanelLondom.add(jLabelLondon);
setEastPanel();
setDatePanel();
}
private void setWestPanel() {
// add time for SouthPanel
JLabel jLabelTime = new JLabel("加载中.");
jLabelTime.setFont(new Font("宋体", Font.BOLD, 30));
Timer timeAction = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
long timemillis = System.currentTimeMillis();
// 转换日期显示格式
SimpleDateFormat time = new SimpleDateFormat("HH:mm:ss ");
jLabelTime.setText(time.format(new Date(timemillis)));
}
});
timeAction.start();
jPanelBeijing.add(jLabelTime);
Button button = new Button("北京暂停");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (BeijingThreadFlag_IsStart) {
timeAction.stop();
button.setLabel("北京继续");
BeijingThreadFlag_IsStart = false;
} else {
timeAction.start();
button.setLabel("北京暂停");
BeijingThreadFlag_IsStart = true ;
}
}
});
jPanelBeijing.add(button);
}
private void setCenterPanel() {
// add time for SouthPanel
JLabel jLabelTime = new JLabel("加载中.");
jLabelTime.setFont(new Font("宋体", Font.BOLD, 30));
Timer timeAction = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
long timemillis = System.currentTimeMillis();
// 转换日期显示格式
SimpleDateFormat time = new SimpleDateFormat("HH:mm:ss ");
jLabelTime.setText(time.format(new Date(timemillis - 13 * 60 * 60 * 1000)));
}
});
timeAction.start();
jPanelNewYork.add(jLabelTime);
Button button = new Button("纽约暂停");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (NewYorkThreadFlag_IsStart) {
timeAction.stop();
button.setLabel("纽约继续");
NewYorkThreadFlag_IsStart = false;
} else {
timeAction.start();
button.setLabel("纽约暂停");
NewYorkThreadFlag_IsStart = true ;
}
}
});
jPanelNewYork.add(button);
}
private void setEastPanel() {
// add time for SouthPanel
// JLabel jLabelDate = new JLabel("Date");
JLabel jLabelTime = new JLabel("加载中.");
jLabelTime.setFont(new Font("宋体", Font.BOLD, 30));
Timer timeAction = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
long timemillis = System.currentTimeMillis();
// SimpleDateFormat date = new SimpleDateFormat("yyyy 年 MM 月 dd
// 日 ");
// jLabelDate.setText(" 当前日期： " + date.format(new
// Date(timemillis)));
SimpleDateFormat time = new SimpleDateFormat("HH:mm:ss ");
jLabelTime.setText(time.format(new Time(timemillis - 8 * 60 * 60 * 1000)));
}
});
timeAction.start();
jPanelLondom.add(jLabelTime);
Button button = new Button("伦敦暂停");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (LondonThreadFlag_IsStart) {
timeAction.stop();
button.setLabel("伦敦继续");
LondonThreadFlag_IsStart = false;
} else {
timeAction.start();
button.setLabel("伦敦暂停");
LondonThreadFlag_IsStart = true ;
}
}
});
jPanelLondom.add(button);
// jPanelLondom.add(jLabelDate);
}
private void setDatePanel() {
// add time for SouthPanel
JLabel jLabelDate = new JLabel("加载中.");
Timer timeAction = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
long timemillis = System.currentTimeMillis();
SimpleDateFormat date = new SimpleDateFormat("yyyy 年 MM 月 dd 日 ");
jLabelDate.setText(" 当前日期： " + date.format(new Date(timemillis)));
}
});
timeAction.start();
jPanelDate.add(jLabelDate);
}
private void jframeClick(){
setDefaultCloseOperation(Jframe.DO_NOTHING_ON_CLOSE);//设置不默认关闭
addWindowListener(new WindowListener() {
@Override
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
int x = JOptionPane.showConfirmDialog(null, "确认退出么？", "友情提示", JOptionPane.OK_CANCEL_OPTION,
JOptionPane.WARNING_MESSAGE);
if (x == 0) {
System.exit(0);
}
}
@Override
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowActivated(WindowEvent e) {
// TODO Auto-generated method stub
}
});
}
}
二、创建ClockText类用于测试
public class ClockText{
public static void main(String[] args) {
new Clock();
}
}
PS：这里再为大家推荐几款时间及日期相关工具供大家参考使用：
在线世界各地时间查询：
http://tools.jb51.net/zhuanhuanqi/worldtime
Unix时间戳(timestamp)转换工具：
http://tools.jb51.net/code/unixtime
在线日期/天数计算器：
http://tools.jb51.net/jisuanqi/date_jisuanqi
更多关于java相关内容感兴趣的读者可查看本站专题：《java日期与时间操作技巧汇总》、《Java数据结构与算法教程》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
