Source Code : Setting an Accessory Component in a JFileChooser Dialog

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Setting an Accessory Component in a JFileChooser Dialog

    

import java.awt.Dimension;
import java.awt.Graphics;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;

import javax.swing.JComponent;
import javax.swing.JFileChooser;

public class Main {
  public static void main(String[] argv) {
    JFileChooser chooser = new JFileChooser();
    chooser.setAccessory(new MyAccessory(chooser));
    chooser.showOpenDialog(null);
  }
}
class MyAccessory extends JComponent implements PropertyChangeListener {
  public MyAccessory(JFileChooser chooser) {
    chooser.addPropertyChangeListener(this);
    setPreferredSize(new Dimension(50, 50));
  }
  public void propertyChange(PropertyChangeEvent evt) {
    if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(evt.getPropertyName())) {
      JFileChooser chooser = (JFileChooser) evt.getSource();
      // Get the new selected file
      File newFile = (File) evt.getNewValue();
      repaint();
    }
  }
  public void paint(Graphics g) {
    // Paint a preview of the selected file
  }
}

   
    
    
    
  

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