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Modify a component

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();   } }