about java swing

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about java swing

How to upload the pictures and photo on the panel in java swing ,plz help
thank a lot.
View Answers

March 4, 2010 at 12:51 PM

Hi Friend,

Try the following code:

import java.awt.*;
import java.io.*;
import javax.swing.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.imageio.ImageIO;

public class UploadImage extends JPanel {
static File file=null;
int index;
JButton button;
BufferedImage bi, bufferImage;
int w, h;

public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel panel = new UploadImage();
frame.getContentPane().add(panel);
frame.setSize(300, 100);
frame.setVisible(true);
}
public UploadImage(){
button=new JButton("Browse");
this.add(button);
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
JFileChooser chooser = new JFileChooser();
chooser.addChoosableFileFilter(new ImageFileFilter());
int returnVal = chooser.showOpenDialog(null);
if(returnVal == JFileChooser.APPROVE_OPTION) {
file = chooser.getSelectedFile();
try{
bi = ImageIO.read(file);
w = bi.getWidth(null);
h = bi.getHeight(null);
if (bi.getType() != BufferedImage.TYPE_INT_RGB) {
BufferedImage bi2 = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics big = bi2.getGraphics();
big.drawImage(bi, 0, 0, null);
bufferImage = bi = bi2;
button.setVisible(true);
}
}
catch(Exception ex){}
}
}
});
}
public Dimension getPreferredSize() {
return new Dimension(w, h);
}
public void paint(Graphics g) {
filterImage();
g.drawImage(bufferImage, 0, 0, null);
}
public void filterImage(){
BufferedImageOp op = null;
switch (index){
case 0:
bufferImage = bi;
return;
case 1:
}
bufferImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
op.filter(bi, bufferImage);
}
}
class ImageFileFilter extends javax.swing.filechooser.FileFilter {
public boolean accept(File file) {
if (file.isDirectory()) return false;
String name = file.getName().toLowerCase();
return (name.endsWith(".jpg") || name.endsWith(".png")|| name.endsWith(".gif"));
}
public String getDescription() { return "Images (*.gif,*.bmp, *.jpg, *.png )"; }
}
Thanks

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