AbstractAction esc_action = new AbstractAction() {
	public void actionPerformed(ActionEvent e) {
		System.out.println("ESCキーが押されました");
	}
};

InputMap imap = this.getRootPane().getInputMap(
	JComponent.WHEN_IN_FOCUSED_WINDOW
);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), "ESC");
this.getRootPane().getActionMap().put("ESC", esc_action);

package myswing;

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

public class LboxText extends JTextField {

	private int _group = 0;

	public LboxText() {
		super();
		initialize();
	}

	private void initialize() {

		this.addKeyListener(new KeyAdapter() {   
		   public void keyPressed(KeyEvent e) {
		      LboxText.this.getParent().dispatchEvent( 
		         new KeyEvent(
		            (Component)(LboxText.this.getParent()),
		            e.getID(),
		            System.currentTimeMillis(),
		            e.getModifiers(),
		            e.getKeyCode(),
		            e.getKeyChar()
		         )
		      );
		   }
		});

	}

	public int getGroup() {

		return this._group;

	}

	public void setGroup(int arg) {

		this._group = arg;

	}

}

jContentPane.setFocusable(true); 
jContentPane.addKeyListener(new java.awt.event.KeyAdapter() {   
	public void keyPressed(java.awt.event.KeyEvent e) {
		System.out.println(e.getKeyCode());
	}
});