I am stuck to with this java code and I did comment on bottom where I can't figure out

package jframe;

import javax.swing.*; import java.awt.*; import java.awt.event.*;

/** * * @author GedeonZNzombi */ public class Main extends JFrame {

private static final long serialVersionUID = 1L;

private JPanel jContentPane = null;

private PanelPelota panel = null;

private PanelPelota getPanel() { if (panel == null) { panel = new PanelPelota(); return panel; }

/** * This is the default constructor */ public Main() { // I am having the problem here super(); initialize(); // Listeners for the keyboard this.addKeyListener(new KeyAdapter() { //Method for the key pressed public void keyPressed(KeyEvent evt) { formKeyPressed(evt); } // Method for the key released public void keyReleased(KeyEvent evt) { formKeyReleased(evt); } });

}

// Here i'm stating the method that will send the key pressed to the game class private void formKeyPressed(KeyEvent evt) { panel.keyPressed(evt); }

// Here i'm stating the method that will send the key released to the game class private void formKeyReleased(KeyEvent evt) { panel.keyReleased(evt); }

/** * This method initializes this * * @return void */ private void initialize() { this.setResizable(false); this.setBounds(new Rectangle(312, 184, 250, 250)); // Position on the desktop this.setMinimumSize(new Dimension(250, 250)); this.setMaximumSize(new Dimension(250, 250)); this.setContentPane(getJContentPane()); this.setTitle("Pong"); }

/** * This method initializes jContentPane * * @return javax.swing.JPanel */ private JPanel getJContentPane() { if (jContentPane == null) { jContentPane = new JPanel(); jContentPane.setLayout(new BorderLayout()); jContentPane.add(getPanel(), BorderLayout.CENTER); } return jContentPane; } public static void main(String[] args) { // TODO code application logic here SwingUtilities.invokeLater(new Runnable() { public void run() { Main thisClass = new Main(); thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); thisClass.setVisible(true); } }); } }