本文實例講述了java實現的動態數字時鐘功能。分享給大家供大家參考，具體如下：
構建：
1. clock繼承 jframe 為運行頁面
2. clocktext 測試類 創建 clock 對象
運行效果：
具體實現：
一、clock類
- 四個jpnal 三個放時間 最后一個放日期
- 放時間的三個jpnal 分別加入 地點 時間 按鈕
- 最后一個按鈕添加日期
具體實現如下：
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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)); } // 關系 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("楷體", font.bold, 36); jlabel jlabelbeijing = new jlabel("北京時間"); jlabelbeijing.setfont(placefont); jpanelbeijing.add(jlabelbeijing); setwestpanel(); jlabel jlabelnewyork = new jlabel("紐約時間"); jlabelnewyork.setfont(placefont); jpanelnewyork.add(jlabelnewyork); setcenterpanel(); jlabel jlabellondon = new jlabel("倫敦時間"); jlabellondon.setfont(placefont); jpanellondom.add(jlabellondon); seteastpanel(); setdatepanel(); } private void setwestpanel() { // add time for southpanel jlabel jlabeltime = new jlabel("加載中."); jlabeltime.setfont(new font("宋體", font.bold, 30)); timer timeaction = new timer(1000, new actionlistener() { public void actionperformed(actionevent e) { long timemillis = system.currenttimemillis(); // 轉換日期顯示格式 simpledateformat time = new simpledateformat("hh:mm:ss "); jlabeltime.settext(time.format(new date(timemillis))); } }); timeaction.start(); jpanelbeijing.add(jlabeltime); button button = new button("北京暫停"); button.addactionlistener(new actionlistener() { @override public void actionperformed(actionevent e) { // todo auto-generated method stub if (beijingthreadflag_isstart) { timeaction.stop(); button.setlabel("北京繼續"); beijingthreadflag_isstart = false; } else { timeaction.start(); button.setlabel("北京暫停"); beijingthreadflag_isstart = true ; } } }); jpanelbeijing.add(button); } private void setcenterpanel() { // add time for southpanel jlabel jlabeltime = new jlabel("加載中."); jlabeltime.setfont(new font("宋體", font.bold, 30)); timer timeaction = new timer(1000, new actionlistener() { public void actionperformed(actionevent e) { long timemillis = system.currenttimemillis(); // 轉換日期顯示格式 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("紐約暫停"); button.addactionlistener(new actionlistener() { @override public void actionperformed(actionevent e) { // todo auto-generated method stub if (newyorkthreadflag_isstart) { timeaction.stop(); button.setlabel("紐約繼續"); newyorkthreadflag_isstart = false; } else { timeaction.start(); button.setlabel("紐約暫停"); newyorkthreadflag_isstart = true ; } } }); jpanelnewyork.add(button); } private void seteastpanel() { // add time for southpanel // jlabel jlabeldate = new jlabel("date"); jlabel jlabeltime = new jlabel("加載中."); jlabeltime.setfont(new font("宋體", 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(" 當前日期： " + 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("倫敦暫停"); button.addactionlistener(new actionlistener() { @override public void actionperformed(actionevent e) { // todo auto-generated method stub if (londonthreadflag_isstart) { timeaction.stop(); button.setlabel("倫敦繼續"); londonthreadflag_isstart = false; } else { timeaction.start(); button.setlabel("倫敦暫停"); londonthreadflag_isstart = true ; } } }); jpanellondom.add(button); // jpanellondom.add(jlabeldate); } private void setdatepanel() { // add time for southpanel jlabel jlabeldate = new jlabel("加載中."); 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(" 當前日期： " + date.format(new date(timemillis))); } }); timeaction.start(); jpaneldate.add(jlabeldate); } private void jframeclick(){ setdefaultcloseoperation(jframe.do_nothing_on_close);//設置不默認關閉 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, "確認退出么？", "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、創建clocktext類用于測試
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public class clocktext{ public static void main(string[] args) { new clock(); }} |
希望本文所述對大家java程序設計有所幫助。
原文鏈接：https://blog.csdn.net/qq_43377749/article/details/85096893
