Depending on where you want to trap the “enter” key, you could use an ActionListener (on such components such as text components or buttons) or attach a key binding to you component
public class MyPanel extends JPanel {
public MyPanel() {
InputMap im = getInputMap(WHEN_FOCUSED);
ActionMap am = getActionMap();
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "onEnter");
am.put("onEnter", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
// Enter pressed
}
});
}
}
This will rely on the component being focused.
