Mega Code Archive
Load Image and scale it
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import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ImageFileFilterImageScale extends JFrame implements ActionListener {
Image img;
JButton getPictureButton = new JButton("Get Picture");
public static void main(String[] args) {
new ImageFileFilterImageScale();
}
public ImageFileFilterImageScale() {
this.setSize(300, 300);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel picPanel = new PicturePanel();
this.add(picPanel, BorderLayout.CENTER);
JPanel buttonPanel = new JPanel();
getPictureButton.addActionListener(this);
buttonPanel.add(getPictureButton);
this.add(buttonPanel, BorderLayout.SOUTH);
this.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String file = getImageFile();
if (file != null) {
Toolkit kit = Toolkit.getDefaultToolkit();
img = kit.getImage(file);
img = img.getScaledInstance(300, -1, Image.SCALE_SMOOTH);
this.repaint();
}
}
private String getImageFile() {
JFileChooser fc = new JFileChooser();
fc.setFileFilter(new ImageFilter());
int result = fc.showOpenDialog(null);
File file = null;
if (result == JFileChooser.APPROVE_OPTION) {
file = fc.getSelectedFile();
return file.getPath();
} else
return null;
}
class PicturePanel extends JPanel {
public void paint(Graphics g) {
g.drawImage(img, 0, 0, this);
}
}
}
class ImageFilter extends javax.swing.filechooser.FileFilter {
public boolean accept(File f) {
if (f.isDirectory())
return true;
String name = f.getName();
if (name.matches(".*((.jpg)|(.gif)|(.png))"))
return true;
else
return false;
}
public String getDescription() {
return "Image files (*.jpg, *.gif, *.png)";
}
}
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