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Java Swing組件實(shí)現(xiàn)進(jìn)度監(jiān)視功能示例

更新時間：2018年02月09日 12:10:46 作者：米格戰(zhàn)斗機(jī)

這篇文章主要介紹了Java Swing組件實(shí)現(xiàn)進(jìn)度監(jiān)視功能,結(jié)合完整實(shí)例形式詳細(xì)分析了Java基于Swing組件實(shí)現(xiàn)進(jìn)度條顯示功能的具體操作技巧與相關(guān)注意事項(xiàng),需要的朋友可以參考下

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：

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);
    // 以啟動一條線程的方式來執(zhí)行一個耗時的任務(wù)
    final Thread targetThread = new Thread(target);
    targetThread.start();
    // 創(chuàng)建進(jìn)度對話框
    final ProgressMonitor dialog = new ProgressMonitor(null,
        "等待任務(wù)完成,任務(wù)完成之前請不要關(guān)閉窗口，否則將取消當(dāng)前操作...", "已完成：0.00%", 0,
        target.getAmount());
    // 創(chuàng)建一個計(jì)時器
    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)度對話框的”取消“按鈕
        if (dialog.isCanceled()) {
          // 停止計(jì)時器
          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();
  }
}
// 模擬一個耗時的任務(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：

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("chabaoo.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);
    // 以啟動一條線程的方式來執(zhí)行一個耗時的任務(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();
  }
}
 // 模擬一個耗時的任務(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：