Java Swing 進度條

注：不是自己寫的，轉的。

參數Thread 就是做耗時任務的線程。

import java.awt.Dialog;
import java.awt.Frame;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;


public class Test7 implements ActionListener
{

    private static final String DEFAULT_STATUS = "Please Waiting";


    private JDialog dialog;


    private JProgressBar progressBar;


    private JLabel lbStatus;


    private JButton btnCancel;


    private Window parent;


    private Thread thread;  //處理業務的線程


    private String statusInfo;


    private String resultInfo;


    private String cancelInfo;


    public static void show(Window parent, Thread thread)
    {
        new Test7(parent, thread, DEFAULT_STATUS, null, null);
    }


    public static void show(Window parent, Thread thread, String statusInfo)
    {
        new Test7(parent, thread, statusInfo, null, null);
    }


    public static void show(Window parent, Thread thread, String statusInfo,

                                  String resultInfo, String cancelInfo)
    {
        new Test7(parent, thread, statusInfo, resultInfo, cancelInfo);
    }


    private Test7(Window parent, Thread thread, String statusInfo,

                                        String resultInfo, String cancelInfo)
    {
        this.parent = parent;
        this.thread = thread;
        this.statusInfo = statusInfo;
        this.resultInfo = resultInfo;
        this.cancelInfo = cancelInfo;
        initUI();
        startThread();
        dialog.setVisible(true);
    }

    private void initUI()
    {
        if(parent instanceof Dialog)
        {
            dialog = new JDialog((Dialog)parent,  true);
        }
        else if(parent instanceof Frame)
        {
            dialog = new JDialog((Frame)parent,  true);
        }
        else
        {
            dialog = new JDialog((Frame)null,  true);
        }

        final JPanel mainPane = new JPanel(null);
        progressBar = new JProgressBar();
        lbStatus = new JLabel("" + statusInfo);
        btnCancel = new JButton("Cancel");
        progressBar.setIndeterminate(true);
        btnCancel.addActionListener(this);

        mainPane.add(progressBar);
        mainPane.add(lbStatus);
        //mainPane.add(btnCancel);

        dialog.getContentPane().add(mainPane);
        dialog.setUndecorated(true); // 除去title
        dialog.setResizable(true);
        dialog.setSize(390, 100);
        dialog.setLocationRelativeTo(parent); //設置此窗口相對於指定組件的位置


        dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE); // 不允許關閉



        mainPane.addComponentListener(new ComponentAdapter()
        {
            public void componentResized(ComponentEvent e)
            {
                layout(mainPane.getWidth(), mainPane.getHeight());
            }
        });
    }

    private void startThread()
    {
        new Thread()
        {
            public void run()
            {
                try
                {
                    thread.start(); // 處理耗時任務
                    // 等待事務處理線程結束
                    thread.join();
                }
                catch(InterruptedException e)
                {
                    e.printStackTrace();
                }
                finally
                {
                    // 關閉進度提示框
                    dialog.dispose();

                    if(resultInfo != null && !resultInfo.trim().equals(""))
                    {
                        String title = "Info";
                        JOptionPane.showMessageDialog(parent, resultInfo, title,

                                                  JOptionPane.INFORMATION_MESSAGE);
                    }
                }
            }
        }.start();
    }

    private void layout(int width, int height)
    {
        progressBar.setBounds(20, 20, 350, 15);
        lbStatus.setBounds(20, 50, 350, 25);
        btnCancel.setBounds(width - 85, height - 31, 75, 21);
    }

    @SuppressWarnings("deprecation")
    public void actionPerformed(ActionEvent e)
    {
        resultInfo = cancelInfo;
        thread.stop();
    }


    public static void main(String[] args) throws Exception
    {


        Thread thread = new Thread()
        {
            public void run()
            {
                int index = 0;

                while(index < 5)
                {
                    try
                    {
                        sleep(1000);                       
                        System.out.println(++index);
                    }
                    catch(InterruptedException e)
                    {
                        e.printStackTrace();
                    }
                }
            }
        };

        Test7.show((Frame)null, thread, "Status", "Result", "Cancel");  

    }
}