Modify the code below so that two separate listener classes

Modify the code below so that two separate listener classes are used - one for each of the two buttons. public class LettRight Panel extends JPanel {private JButton left, right; private JLabel label; public LeftRightPanel () {left = new JButton (\"Left\"); right = new JButton (\"Right\"); label = new JLabel(\"Left/Right\"); ButtonListener listener = new ButtonListener(); left.addActionListener (listener); right.addActionLiatener (listener); add (left); add (right); add (label);} private class ButtonListener implements ActionListener public void actionPerformed (ActionEvent event) {if (event.getSource() == left) label.setText(\"Left\"); else label.setText(\"Right\");}}}

Solution

Hi,

I have modifief the code and highlighted the code changes below.

LeftRightPanel.java

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class LeftRightPanel extends JPanel{
   private JButton left, right;
   private JLabel label;
   public LeftRightPanel(){
       left = new JButton(\"Left\");
       right = new JButton(\"Right\");
       label = new JLabel(\"Left/Right\");
       LeftButtonListener leftListener = new LeftButtonListener();
       RightButtonListener rightListener = new RightButtonListener();
       left.addActionListener(leftListener);
       right.addActionListener(rightListener);
       add(left);
       add(right);
       add(label);
   }
   private class LeftButtonListener implements ActionListener{

       public void actionPerformed(ActionEvent e) {
           label.setText(\"Left\");
       }
      
   }
   private class RightButtonListener implements ActionListener{

       public void actionPerformed(ActionEvent e) {
           label.setText(\"Right\");
       }
      
   }  
}