Add icon settings to swing Action in Java

import java.awt.event.ActionEvent;
/*  w w  w .jav a 2  s.co m*/
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;

public class Main {
  public static void main(String[] argv) throws Exception {
    // Retrieve the icon
    Icon icon = new ImageIcon("a.gif");

    // Create an action with an icon
    Action action = new AbstractAction("Button Label", icon) {
      // This method is called when the button is pressed
      public void actionPerformed(ActionEvent evt) {
        // Perform action
      }
    };

    // Create the button; the icon will appear to the left of the label
    JButton button = new JButton(action);
  JFrame f = new JFrame();
  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  f.add(button);
  f.setSize(300, 200);
  f.setVisible(true);
  }
}