DefaultEditorKit.java 文件源码

/**
 * The operation to perform when this action is triggered.
 *
 * @param e the action event
 */
public void actionPerformed(ActionEvent e) {
    JTextComponent target = getTextComponent(e);
    if (target != null) {
        if ((! target.isEditable()) || (! target.isEnabled())) {
            UIManager.getLookAndFeel().provideErrorFeedback(target);
            return;
        }
        target.replaceSelection("\n");
    }
}