Assign a keyboard key to a JButton.

[gszauer]

So, i need some help :)
I want to press a key, and invoke the action of a coresponding button.
So, for instance, if i press the key 1, i would like my jbutton (button[1]) to "be pressed"

Here is the keyboard scanning code i wrote

public void keyReleased(KeyEvent e){
 }
 
 public void keyTyped(KeyEvent e){
 }
 
 public void keyPressed (KeyEvent e){
   keyID = e.getID();
   if (keyID == 97 || keyID == 49){
     // 1
   } else if (keyID == 98 || keyID == 50){
     // 2
   } else if (keyID == 99 || keyID == 51){
     // 3
   } else if (keyID == 100 || keyID == 52){
     // 4
   } else if (keyID == 101 || keyID == 53){
     // 5
   } else if (keyID == 102 || keyID == 54){
     // 6
   } else if (keyID == 103 || keyID == 55){
     // 7
   } else if (keyID == 104 || keyID == 56){
     // 8 
   } else if (keyID == 105 || keyID == 57){
     // 9
   } else if (keyID == 110 || keyID == 46){
     // .
   } else if (keyID == 10){
     // =
   } else if (keyID == 107){
     // +
   } else if (keyID == 109){
     // -
   } else if (keyID == 106){
     // *
   } else if (keyID == 111){
     // /
   } else if (keyID == 67){
     // C
   }
   JOptionPane.showMessageDialog(null, keyID+" Was Pressed", "Exception Error",  JOptionPane.INFORMATION_MESSAGE);
 }

My class is

public class CalClass extends JFrame implements ActionListener, KeyListener {

So i have

this.addKeyListener(this);

But when i press a key i am not informed that a key was pressed by the JOptionPane, so i take im not doing something right.

ALSO, once i have it so where its listening for keypresses correctly, how can i get it to "Press" certin buttons for me?
For instance, where my code has //C I would like for it to execute the action that i execute when the JButton calculate = new JButton("C"); button is pressed....

Can anyone offer any guidance?

[hardwired]

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

public class ButtonKeys {
    private JPanel getContent() {
        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        for(int j = 0; j < 4; j++) {
            JButton button = new JButton("button " + (j+1));
            button.setActionCommand(String.valueOf(j+1));
            button.addActionListener(action);
            gbc.gridwidth = (j % 2 == 0) ? GridBagConstraints.RELATIVE
                                         : GridBagConstraints.REMAINDER;
            panel.add(button, gbc);
        }
        return panel;
    }

    private void registerKeys(JFrame f) {
        JRootPane rootPane = f.getRootPane();
        int c = JComponent.WHEN_IN_FOCUSED_WINDOW;
        for(int j = 0; j < 4; j++) {
            String s = String.valueOf(j+1);
            rootPane.getInputMap(c).put(KeyStroke.getKeyStroke(s), s);
            rootPane.getActionMap().put(s, action);
        }
    }

    private Action action = new AbstractAction() {
        public void actionPerformed(ActionEvent e) {
            String ac = e.getActionCommand();
            System.out.println("ac = " + ac);
            if(ac.equals("1"))
                System.out.println("do something for button 1");
        }
    };

    public static void main(String[] args) {
        ButtonKeys test = new ButtonKeys();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(test.getContent());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
        test.registerKeys(f);
    }
}