JAVA小问题

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.io.*;
class MapFrame extends JFrame implements ActionListener,KeyListener{
JLabel play[] = new JLabel[100];
JLabel image;
static int xp=100;
static int yp=295;

//窗格
Container con;
JButton anew;
JButton exit;
JToolBar jmain;
JLabel text;
MapFrame(){new MapFrame("sd");}
MapFrame(String title){
//获行客格引用
con = this.getContentPane();
con.setLayout(null);
//
jmain = new JToolBar();
text = new JLabel("版权作者、");
//当鼠标放上显示信息
anew = new JButton(" 新 游 戏 ");
anew.setToolTipText("重新开始新的一局");
exit = new JButton(" 退  出 ");
exit.setToolTipText("退出程序");
text.setToolTipText("信息提示");
jmain.setLayout(new GridLayout(0,4));
jmain.add(anew);
//jmain.add(repent);
jmain.add(exit);
jmain.add(text);
jmain.setBounds(0,0,1000,60);
con.add(jmain);
anew.addActionListener(this);

exit.addActionListener(this);
con.addKeyListener(this);
con.setFocusable(true);
//requestFocus();


drawMouse(xp,yp);
    drawB