本文實(shí)例講述了java swing組件實(shí)現(xiàn)進(jìn)度監(jiān)視功能。分享給大家供大家參考，具體如下：
實(shí)例一：
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import java.awt.event.actionevent;import java.awt.event.actionlistener;import javax.swing.progressmonitor;import javax.swing.timer;public class testprogressmonitor { timer timer; public void init() { final simulatedtargetmi target = new simulatedtargetmi(1000); // 以啟動(dòng)一條線程的方式來執(zhí)行一個(gè)耗時(shí)的任務(wù) final thread targetthread = new thread(target); targetthread.start(); // 創(chuàng)建進(jìn)度對(duì)話框 final progressmonitor dialog = new progressmonitor(null, "等待任務(wù)完成,任務(wù)完成之前請(qǐng)不要關(guān)閉窗口，否則將取消當(dāng)前操作...", "已完成：0.00%", 0, target.getamount()); // 創(chuàng)建一個(gè)計(jì)時(shí)器 timer = new timer(300, new actionlistener() { public void actionperformed(actionevent e) { // 以任務(wù)的當(dāng)前完成量設(shè)置進(jìn)度對(duì)話框的完成比例 dialog.setprogress(target.getcurrent()); dialog.setnote("已完成：" + target.getpercent()); // 如果用戶單擊了進(jìn)度對(duì)話框的”取消“按鈕 if (dialog.iscanceled()) { // 停止計(jì)時(shí)器 timer.stop(); // 中斷任務(wù)的執(zhí)行線程 targetthread.interrupt(); // 系統(tǒng)退出 system.exit(0); } } }); timer.start(); } public static void main(string[] args) { new testprogressmonitor().init(); }}// 模擬一個(gè)耗時(shí)的任務(wù)class simulatedtargetmi implements runnable { // 任務(wù)的當(dāng)前完成量 private volatile int current; // 總?cè)蝿?wù)量 private int amount; public simulatedtargetmi(int amount) { current = 0; this.amount = amount; } public int getamount() { return amount; } public int getcurrent() { return current; } // run方法代表不斷完成任務(wù)的過程 public void run() { while (current < amount) { try { thread.sleep(50); } catch (interruptedexception e) { } current++; } } public string getpercent() { return string.format("%.2f", 100.0 * current / amount) + "%"; }} |
運(yùn)行效果：
實(shí)例二：
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import java.awt.flowlayout;import java.awt.font;import java.awt.event.actionevent;import java.awt.event.actionlistener;import java.awt.event.windowadapter;import java.awt.event.windowevent;import javax.swing.box;import javax.swing.boxlayout;import javax.swing.jframe;import javax.swing.jlabel;import javax.swing.jpanel;import javax.swing.jprogressbar;import javax.swing.timer; public class testjprogressbar { jframe frame = new jframe("www.ythuaji.com.cn - 當(dāng)前進(jìn)度指示..."); // 創(chuàng)建一條垂直進(jìn)度條 jprogressbar bar = new jprogressbar(jprogressbar.horizontal); jlabel tiplabel = new jlabel("提示：", jlabel.left); jlabel contentlabel = new jlabel("任務(wù)完成之前請(qǐng)不要關(guān)閉窗口，否則將取消當(dāng)前操作...", jlabel.left); jlabel statuslabel = new jlabel(" ", jlabel.center); public void init() { frame.setlayout(new flowlayout()); frame.setresizable(false); tiplabel.setfont(new font("serif", font.plain, 14)); contentlabel.setfont(new font("serif", font.plain, 14)); statuslabel.setfont(new font("serif", font.plain, 14)); jpanel panel = new jpanel(); // fr5.setborder(new titledborder("boxlayout - y")); panel.setlayout(new boxlayout(panel, boxlayout.y_axis)); panel.add(tiplabel); panel.add(box.createverticalstrut(2)); panel.add(contentlabel); panel.add(box.createverticalstrut(7)); panel.add(bar); // panel.add(box.createverticalglue()); panel.add(box.createverticalstrut(2)); panel.add(statuslabel); frame.add(panel, 0); final simulatedtarget target = new simulatedtarget(1000); // 以啟動(dòng)一條線程的方式來執(zhí)行一個(gè)耗時(shí)的任務(wù) final thread thread = new thread(target); thread.start(); // 設(shè)置在進(jìn)度條中繪制完成百分比 bar.setstringpainted(true); // bar.setpreferredsize(new dimension(100, 18)); // 設(shè)置進(jìn)度條的最大值和最小值, bar.setminimum(0); // 以總?cè)蝿?wù)量作為進(jìn)度條的最大值 bar.setmaximum(target.getamount()); final timer timer = new timer(300, new actionlistener() { public void actionperformed(actionevent e) { // 以任務(wù)的當(dāng)前完成量設(shè)置進(jìn)度條的value bar.setvalue(target.getcurrent()); if (target.getamount() <= target.getcurrent()) { statuslabel.settext("處理完成,oh yes!"); } } }); timer.start(); frame.setlocationrelativeto(null); frame.setdefaultcloseoperation(jframe.dispose_on_close); // frame.setdefaultcloseoperation(jframe.exit_on_close); frame.addwindowlistener(new windowadapter() { @override public void windowclosing(windowevent e) { thread.interrupt(); timer.stop(); // 系統(tǒng)退出 system.exit(0); } }); // 該代碼依據(jù)放置的組件設(shè)定窗口的大小使之正好能容納你放置的所有組件 frame.pack(); frame.setvisible(true); } public static void main(string[] args) { new testjprogressbar().init(); }} // 模擬一個(gè)耗時(shí)的任務(wù)class simulatedtarget implements runnable { // 任務(wù)的當(dāng)前完成量 private volatile int current; // 總?cè)蝿?wù)量 private int amount; public simulatedtarget(int amount) { current = 0; this.amount = amount; } public int getamount() { return amount; } public int getcurrent() { return current; } // run方法代表不斷完成任務(wù)的過程 public void run() { while (current < amount) { try { thread.sleep(20); } catch (interruptedexception e) { } current++; } } public string getpercent() { return string.format("%.1f", 100.0 * current / amount) + "%"; }} |
運(yùn)行結(jié)果：
希望本文所述對(duì)大家java程序設(shè)計(jì)有所幫助。
原文鏈接：http://blog.csdn.net/qiuzhi__ke/article/details/49817453
