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Java实现的动态数字时钟功能示例【显示世界时间】

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 28 4
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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:

Java实现的动态数字时钟功能示例【显示世界时间】

具体实现:

1、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
             }
         });
     }
}

2、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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