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：
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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
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public class clocktext{ public static void main(string[] args) { new clock(); }} |
希望本文所述对大家java程序设计有所帮助。
原文链接：https://blog.csdn.net/qq_43377749/article/details/85096893
