Thread: I get this error when compiling my program

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Hi
am trying to get my button handler to work but ends up getting this error message
"ButtonFrame.ButtonHandler is not abstract and does not override abstract method actionPerformed(ActionEvent) in ActionListener"

[highlight=Java]
// ButtonFrame.java
// Creating JButton
package btest.ButtonFrame;
 
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
 
public class ButtonFrame extends JFrame{
   private JButton plainJButton; // button with just text
   private JButton fancyJButton; // button with icons
 
   // ButtonFrame adds JButtons to JFrame
   public ButtonFrame(){
      super("Testing Buttons");
      setLayout(new FlowLayout()); // set frame layout
 
      plainJButton = new JButton("Plain Button"); // button with text
      add(plainJButton); // add plainJButton to JFrame
 
      Icon bug1 = new ImageIcon(getClass().getResource("HD.png"));
      Icon bug2 = new ImageIcon(getClass().getResource("Apple.png"));
      fancyJButton = new JButton("Fancy Button", bug1); // set image
      fancyJButton.setRolloverIcon(bug2); // set rollover image
      add(fancyJButton); // add fancyJButto to JFrame
 
      // create new ButtonHandler for button event handling
      ButtonHandler handler = new ButtonHandler();
      fancyJButton.addActionListener(handler);
      plainJButton.addActionListener(handler);
   } // end ButtonFrame constructor
 
   // inner class for button event handling
   private class ButtonHandler implements ActionListener{ // THE ERROR IS ON THIS LINE
      // handle button event
      public void actionPerfomed(ActionEvent event){
         JOptionPane.showMessageDialog(ButtonFrame.this, String.format("You pressed: %s",
                 event.getActionCommand()));
      }
   }
}
 
 
 
 
 
//ButtonTest.java
// Testing ButtonFrame
package btest;
import btest.ButtonFrame.ButtonFrame;
import javax.swing.JFrame;
 
public class BTest {
 
   public static void main(String[] args) {
      ButtonFrame buttonFrame = new ButtonFrame(); // create button frame
      buttonFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      buttonFrame.setSize(275, 110); // set frame size
      buttonFrame.setVisible(true); // display frame
   }
}
 
 
 
 
[/highlight]