Re: menuKeyTyped and menuKeyReleased methods do not work.

Try this simplified one:
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class MenuEnterKey extends JFrame
 implements MenuKeyListener, ItemListener{

  JLabel l = new JLabel();
  JLabel a = new JLabel("Enter Loan Amount");
  JLabel pay = new JLabel("");

  ButtonGroup group0 = new ButtonGroup( );

  JRadioButtonMenuItem year7 = new JRadioButtonMenuItem("7 Years at
5.35%");
  JRadioButtonMenuItem year15 = new JRadioButtonMenuItem("15 Years at
5.5%");
  JRadioButtonMenuItem year30
   = new JRadioButtonMenuItem("30 Years at 5.75%",true);

  Container pane;

  public MenuEnterKey(){
    super("Loan Payment");
    setSize(300, 200);
    setLocation(200, 200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);

    JMenuItem quitItem = new JMenuItem("Exit");

    year30.addMenuKeyListener(this);

    year7.addItemListener(this);
    year15.addItemListener(this);
    year30.addItemListener(this);

    JMenu menu1 = new JMenu("Select a Term");
    menu1.setMnemonic('S');
    year7.setMnemonic('7');
    year15.setMnemonic('1');
    year30.setMnemonic('3');

    group0.add(year7);
    menu1.add(year7);
    group0.add(year15);
    menu1.add(year15);
    group0.add(year30);
    menu1.add(year30);
    menu1.addSeparator( );
    menu1.add(quitItem);

    // create a menu bar and use it in this JFrame
    JMenuBar menuBar = new JMenuBar();
    menuBar.add(menu1);

    JPanel p1 = new JPanel();
    JPanel p2 = new JPanel();
    FlowLayout flo = new FlowLayout(FlowLayout.LEFT,10,20);
    BorderLayout brd = new BorderLayout(5,5);
    pane = getContentPane();
    p1.setLayout(brd);
    p2.setLayout(flo);
    pane.setLayout(flo);
    pane.add(l);
    pane.add(p2);
    pane.add(p1);
    setJMenuBar(menuBar);
  }

  public void menuKeyTyped(MenuKeyEvent e){
    System.out.println("type " + e.getKeyText(e.getKeyCode()));
  }

  public void menuKeyReleased(MenuKeyEvent e){
    System.out.println("release " + e.getKeyText(e.getKeyCode()));
  }

  public void menuKeyPressed(MenuKeyEvent e){
      System.out.println("press " + e.getKeyText(e.getKeyCode()));
  }

  public void itemStateChanged(ItemEvent e) {
    if (e.getSource() == year7){
      l.setText("Selected Term is 7 years.");
    }
    else if (e.getSource() == year15){
      l.setText("Selected Term is 15 years.");
    }
    else if (e.getSource() == year30){
      l.setText("Selected Term is 30 years.");
    }
  }

  public static void main(String[] args){
    MenuEnterKey f= new MenuEnterKey();
    f.setVisible(true);
  }
}
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