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
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