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：
unix时间戳(timestamp)转换工具：
在线日期/天数计算器：
希望本文所述对大家java程序设计有所帮助。
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