KeyStroke Sample: VKEnter : KeyStroke « Swing Event « Java Tutorial

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
public class KeyStrokeSampleVKEnter {
  public static void main(String[] a) {
    String ACTION_KEY = "theAction";
    JFrame frame = new JFrame("KeyStroke Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton buttonA = new JButton("<html><center>FOCUS/RELEASE<br>VK_ENTER");
    Action actionListener = new AbstractAction() {
      public void actionPerformed(ActionEvent actionEvent) {
        JButton source = (JButton) actionEvent.getSource();
        System.out.println(source.getText());
      }
    };
    KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, true);
    InputMap inputMap = buttonA.getInputMap();
    inputMap.put(enter, ACTION_KEY);
    ActionMap actionMap = buttonA.getActionMap();
    actionMap.put(ACTION_KEY, actionListener);
    buttonA.setActionMap(actionMap);
    frame.add(buttonA);
    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}

15.22.KeyStroke
	15.22.1.	KeyStroke Class
	15.22.2.	Creating a KeyStroke
	15.22.3.	Registering a KeyStroke
	15.22.4.	KeyStroke Sample: VKEnter
	15.22.5.	KeyStroke Sample: function key and Shift key
	15.22.6.	KeyStroke Sample: Space key
	15.22.7.	List keystrokes in the WHEN_ANCESTOR_OF_FOCUSED_COMPONENT input map of the component
	15.22.8.	List keystrokes in the WHEN_IN_FOCUSED_WINDOW input map of the component
	15.22.9.	Converting a KeyStroke to a String
	15.22.10.	Creating a KeyStroke and Binding It to an Action
	15.22.11.	KeyStroke.getKeyStroke('F2')
	15.22.12.	Overriding - key
	15.22.13.	Override $ key
	15.22.14.	Overriding space key
	15.22.15.	Set java.awt.Container.getFocusTraversalKeys(int id)
	15.22.16.	Activating a Keystroke When Any Component in the Window Has Focus
	15.22.17.	Remove all forward focus traversal keys for the application
	15.22.18.	Remove all backward focus traversal keys for the application
	15.22.19.	Activating a Keystroke When Any Child Component Has Focus
	15.22.20.	Bind a keystroke to shift-space
	15.22.21.	KeyStroke to String
	15.22.22.	Get Key Text