import javax.swing.*; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; public abstract class MyFrame extends JFrame implements KeyListener { public MyFrame(){ this.setSize(800,600); this.setLocationRelativeTo(null); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); this.setResizable(false); this.addKeyListener(this); this.setTitle("武当王也的超级玛丽"); } public static void main(String[] args) { MyFrame myFrame= new MyFrame() {