它不会让我运行程序因错误: 类型BingoHelper
必须实现继承的抽象方法ActionListener.actionPerformed(ActionEvent)
摘要行动实施
public class BingoHelper extends JFrame implements WindowListener, ActionListener{
JButton b = new JButton(new AbstractAction("Enter"){
public void actionPerformed (ActionEvent e){
任何解决方案? – JavaScrub