基于有人問到如何做進度條，以下給個簡單的做法：

主要是使用JProgressBar(Swing內置javax.swing.JProgressBar)和SwingWorker(Swing內置javax.swing.SwingWorker)

有人肯定會說，不是用線程做的嗎？使用線程共享一個變量，確實能夠。只是這樣的方式不太優雅，當然，你能夠再用線程封裝也行。只是，SwingWorker已經幫我們封裝好啦～～使用現成的東西來做還是方便^_^

先看效果：

以下看代碼：非常easy,相信各位大大肯定是懂的～

package org.ubird;

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.Image;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.ExecutionException;

import javax.imageio.ImageIO;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JProgressBar;

import javax.swing.JScrollPane;

import javax.swing.SwingUtilities;

import javax.swing.SwingWorker;

public class TestSwingWorker extends SwingWorker,String>{

private JLabel status;

private JPanel viewer;

private String[] imagesName;

private JProgressBar jpb;

public static void main(String[] args) {

SwingUtilities.invokeLater(new Runnable(){

public void run() {

TestFrame frame = new TestFrame();

final JPanel panel = new JPanel();

final JLabel label = new JLabel();

final String[] imagesName = new String[38];

for(int i=0; i

imagesName[i] = "res/1 ("+(i+1)+").jpg";

}

JScrollPane sp = new JScrollPane(panel);

sp.setSize(new Dimension(700,500));

frame.add(sp,BorderLayout.CENTER);

JPanel stp = new JPanel();

final JProgressBar jpb = new JProgressBar();

jpb.setMinimum(1);

jpb.setMaximum(imagesName.length);

stp.add(jpb);

stp.add(label);

frame.add(stp,BorderLayout.SOUTH);

JButton button = new JButton("load image");

button.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

TestSwingWorker sw = new TestSwingWorker(label, panel, imagesName, jpb);

sw.execute();

}

});

frame.add(button,BorderLayout.NORTH);

frame.setVisible(true);

}

});

}

public TestSwingWorker(JLabel status, JPanel viewer, String[] imagesName, JProgressBar jpb){

this.status = status;

this.viewer = viewer;

this.imagesName = imagesName;

this.jpb = jpb;

}

@Override

protected List doInBackground() throws Exception {

List image = new ArrayList();

for(int i=0; i

image.add(ImageIO.read(getClass().getClassLoader().getResource(imagesName[i])));

publish("已經載入了 "+(i+1)+"/"+imagesName.length+" : "+imagesName[i]);

}

return image;

}

@Override

protected void process(List chunks) {

status.setText(chunks.get(chunks.size()-1));

int x = Integer.parseInt(chunks.get(chunks.size()-1).substring(chunks.get(chunks.size()-1).indexOf("(")+1,chunks.get(chunks.size()-1).indexOf(")")).trim());

jpb.setValue(x);

for(String str : chunks){

System.out.println(str);

}

}

@Override

protected void done() {

try {

for(Image image : get()){

JLabel label = new JLabel(new ImageIcon(image));

label.setSize(160, 120);

label.setPreferredSize(new Dimension(160,120));

viewer.add(label);

}

} catch (InterruptedException e) {

e.printStackTrace();

} catch (ExecutionException e) {

e.printStackTrace();

}

}

}

package org.ubird;

import javax.swing.JFrame;

public class TestFrame extends JFrame {

public TestFrame(){

setTitle("Test Frame");

setSize(800,600);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}

NOTE：解壓后雙擊里面的：CompileAndRun.bat可在Win下直接執行

總結

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