Modify a component: press space bar or F2 to move focus to next focusable component. : InputMap « Swing Event « Java Tutorial

1. Java Tutorial
2. Swing Event
3. InputMap

import java.awt.Component;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;

public class Main {
  public static void main(String[] argv) {
    JButton component = new JButton();
    NextFocusAction nextFocusAction = new NextFocusAction();

    component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("SPACE"),
        nextFocusAction.getValue(Action.NAME));

    component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("F2"),
        nextFocusAction.getValue(Action.NAME));

    component.getActionMap().put(nextFocusAction.getValue(Action.NAME), nextFocusAction);
    
  }
}

class NextFocusAction extends AbstractAction {
  public NextFocusAction() {
    super("Move Focus Forwards");
  }
  public void actionPerformed(ActionEvent evt) {
    ((Component) evt.getSource()).transferFocus();
  }
}