JAVA复制带进度条时间百分比

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/**
 * &＃64;(#)JprogressBar.java
 * it can copy file
 * show speed remail time and copy precent      
 * &＃64;author hcmfys
 * &＃64;version 1.00 2008/5/9
 *把我们的智慧献给全人类
 */

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

public class JprogressBar extends JFrame implements Runnable {

    public JprogressBar() {
        initUI();
    }

    private void initUI() {
        btCopy &＃61; new JButton("open file....");
        JButton btCancel &＃61; new JButton("cancel");
        JButton btSavePath &＃61; new JButton("save Path...");
        copyFileProgressBar &＃61; new JProgressBar(0, 100);
        copyFileProgressBar.setPreferredSize(new Dimension(450, 15));
        copyFileProgressBar.setBackground(Color.GREEN);
        copyFileProgressBar.setForeground(Color.PINK);
        copyFileProgressBar.setStringPainted(true);
        copyFileProgressBar.setVisible(false);
        openFileDialog &＃61; new JFileChooser(".");
        this.setLayout(new BorderLayout());
        JPanel tmpPanel1 &＃61; new JPanel();
        JPanel tmpPanel2 &＃61; new JPanel();
        btCopy.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Thread t &＃61; new Thread(JprogressBar.this);
                t.start();
            }

        });
        btSavePath.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                savePath &＃61; setSavePath();
            }
        });
        btCancel.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                stop &＃61; true;
                btCopy.setEnabled(true);
            }
        });
        tmpPanel1.add(btCopy);
        tmpPanel1.add(btSavePath);
        tmpPanel1.add(btCancel);
        tmpPanel2.add(copyFileProgressBar);
        this.add(tmpPanel1, BorderLayout.NORTH);
        this.add(tmpPanel2, BorderLayout.SOUTH);
        this.setTitle("read and copy file");
        this.setPreferredSize(new Dimension(450, 95));
        this.pack();
        Dimension cd &＃61; centerIt(this);
        this.setLocation(cd.width, cd.height);
        final Dimension des &＃61; this.getPreferredSize();
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                stop &＃61; true;
                System.exit(0);
            }

            public void windowStateChanged(WindowEvent e) {
                System.out.println("ss");
                if (e.paramString().equals("WINDOW_STATE_CHANGED")) {
                    System.out.println("ss");
                    JprogressBar.this.setSize(des);
                }
            }
        });
        this.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent evt) {
              //  System.out.println("ss");
              //  JprogressBar.this.setSize(des);
            }

        });
    }

    /*
    * start read file..
    */
    public void run() {
        stop &＃61; false;
        int c &＃61; openFileDialog.showOpenDialog(this);
        if (c &＃61;&＃61; JFileChooser.APPROVE_OPTION) {
            try {
                File selectFile &＃61; openFileDialog.getSelectedFile();
                if (selectFile.equals(savePath)) {
                    JOptionPane.showMessageDialog(this, "  \t target file and source file can&＃39;t as the same !");
                    return;
                }
                if (savePath &＃61;&＃61; null) {
                    JOptionPane.showMessageDialog(this, "  \t please select a path to save file !");
                    return;
                }
                btCopy.setEnabled(false);
                copyFileProgressBar.setVisible(true);
                long size &＃61; selectFile.length();
                copyFileProgressBar.setMaximum((int) size);
                FileInputStream fin &＃61; new FileInputStream(selectFile);
                FileOutputStream fout &＃61; new FileOutputStream(savePath);
                byte[] buff &＃61; new byte[1024];
                int s;
                int count &＃61; 0;
                long startTime &＃61; System.currentTimeMillis();
                while ((s &＃61; fin.read(buff)) > 0 && !stop) {
                    count &＃43;&＃61; s;
                    fout.write(buff, 0, s);
                    String str &＃61; "" &＃43; 100 * (count / (size &＃43; 0.01));
                    str &＃61; forMatString(str);
                    long endTime &＃61; System.currentTimeMillis();
                    String speedStr &＃61; getSpeed(count, startTime, endTime);
                    String remailTime &＃61; getRemailTime(count, size, startTime, endTime);
                    copyFileProgressBar.setString(" precent:   " &＃43; str &＃43; " %" &＃43; "    speed: " &＃43; speedStr &＃43; "    " &＃43; " remail  time : " &＃43; remailTime);
                    copyFileProgressBar.setValue(count);
                }
                fin.close();
                fout.close();
                if (!stop) {
                    JOptionPane.showMessageDialog(this, "  \t copy file complete  !");
                }
                stop &＃61; true;
                savePath &＃61; null;
                btCopy.setEnabled(true);
                copyFileProgressBar.setValue(0);
                copyFileProgressBar.setString("");
                copyFileProgressBar.setVisible(false);
            } catch (Exception ex) {
                JOptionPane.showMessageDialog(this, "err:\n" &＃43; ex.getMessage());
            }
        }
    }

    /*
    *select  save file path
    */
    private File setSavePath() {
        File path &＃61; null;
        int c &＃61; openFileDialog.showSaveDialog(this);
        if (c &＃61;&＃61; JFileChooser.APPROVE_OPTION) {
            path &＃61; openFileDialog.getSelectedFile();
        }
        return path;
    }

    /*
    * make frame center
    */
    private Dimension centerIt(Component c) {
        Dimension size &＃61; c.getSize();
        Dimension screenSize &＃61; Toolkit.getDefaultToolkit().getScreenSize();
        int sH &＃61; screenSize.height;
        int sW &＃61; screenSize.width;
        int cW &＃61; size.width;
        int cH &＃61; size.height;
        return new Dimension((sW - cW) / 2, (sH - cH) / 2);
    }

    /*
    * show copy file  speed
    */
    private String getSpeed(long readByte, long startTime, long endTime) {
        long speed;
        if (endTime - startTime !&＃61; 0) {
            speed &＃61; (readByte / (endTime - startTime)) * 1000;
            if (speed > 1024 * 1024) {
                return forMatString(speed / (1024 * 1024 &＃43; 0.1) &＃43; "") &＃43; " m/s";
            } else if (speed > 1024) {
                return forMatString(speed / (1024 &＃43; 0.1) &＃43; "") &＃43; " k/s";
            } else {
                return speed &＃43; " b/s";
            }
        } else {
            return "0 b/s";
        }
    }

    /*
    * format string
    */
    private String forMatString(String str) {
        String values;
        int index &＃61; str.indexOf(".");
        values &＃61; str.substring(0, index &＃43; 3);
        return values;
    }

    /*
    * get remail time
    */
    private String getRemailTime(long readByte, long totalByte, long startTime, long endTime) {
        long hour;
        long minute;
        long second;
        String h;
        String m;
        String s;
        try {
            long speed &＃61; readByte / (endTime - startTime);
            long time &＃61; ((totalByte - readByte) / speed) / 1000;
            hour &＃61; time / 3600;
            minute &＃61; time % 3600 / 60;
            second &＃61; time % 3600 % 60;
            h &＃61; hour &＃43; "";
            m &＃61; minute &＃43; "";
            s &＃61; second &＃43; "";
            if (hour <10) {
                m &＃61; "0" &＃43; minute;
            }
            if (minute <10) {
                m &＃61; "0" &＃43; minute;
            }
            if (second <10) {
                s &＃61; "0" &＃43; second;
            }
            return h &＃43; ":" &＃43; m &＃43; ":" &＃43; s;
        } catch (Exception ex) {
            return "00:00:00";
        }

    }

    /*
    * show frm
    */

    public static void main(String[] args) {
        JprogressBar frm &＃61; new JprogressBar();
        frm.setVisible(true);
    }

    /*
    *
    */
    private JButton btCopy;
    private JFileChooser openFileDialog;
    private JProgressBar copyFileProgressBar;
    private File savePath &＃61; null;
    private boolean stop &＃61; false;
}