围棋问题 有个大家能帮我调节下程序么？谢谢

import java.awt.*;
import java.awt.event.*;
//创建棋盘的类
class ChessPad extends Panel implements MouseListener,ActionListener
{
int x=-1,y=-1,棋子颜色=-1;
Button button=new Button("重新开局");
TextField text_1=new TextField("请黑棋下子"),
          text_2=new TextField();
ChessPad()
{
setSize(440,440);
setLayout(null);setBackground(Color.orange);
addMouseListener(this);add(button);button.setBounds(10,5,60,26);
button.addActionListener(this);
add(text_1);text_1.setBounds(90,5,90,24);
add(text_2);text_2.setBounds(290,5,90,24);
text_1.setEditable(false);text_2.setEditable(false);

}
public void paint(Graphics g)                //绘制围棋棋盘的外观
{
for(int i=40;i<=380;i=i+20)
{
g.drawLine(40,i,400,i);
}
g.drawLine(40,400,400,400);
for(int j=40;j<=380;j=j+20)
{
g.drawLine(j,40,j,400);
}
    g.drawLine(400,40,400,400);
    g.fillOval(97,97,6,6);
    g.fillOval(337,97,6,6);
    g.fillOval(97,337,6,6);
    g.fillOval(337,337,6,6);
    g.fillOval(217,217,6,6);
}
public void mousePressde(MouseEvent e)       //当按下鼠标左键时下棋子
{
if(e.getModifiers()==InputEvent.BUTTON1_MASK)
{
x=(int)e.getX();y=(int)e.getY();     //获取按下鼠标时的坐标位置
ChessPoint_black chesspoint_black=new ChessPoint_black(this);
ChessPoint_white chesspoint_white=new ChessPoint_white(this);
int a=(x+10)/20,b=(y+10)/20;
if(x/20<2||y/20<2||x/20>19||y/20>19) //棋盘以外不下棋子
{
}
else
{
if(棋子颜色==1)                  //当棋子颜色是1时下黑棋子
{
this.add(chesspoint_black);
chesspoint_black.setBounds(a*20-10,b*20-10,20,20);
棋子颜色=棋子颜色*(-1);
text_2.setText("请白棋下子");
text_1.setText("");
}
else if(棋子颜色==-1)            //当棋子颜色是-1时下白棋子
{
this.add(chesspoint_white);
chesspoint_white.setBounds(a*20-10,b*20-10,20,20);
棋子颜色=棋子颜色*(-1);
text_2.setText("请下黑棋子");
text_1.setText("");
}
              }
}
}    public void mouseRelessed(MouseEvent e){}
    public void mouseEetered(MouseEvent e){}
    public void mouseExited(MouseEvent e){}
    public void mouseClicked(MouseEvent e){}
    public void actionPerformed(ActionEvent e)
    {
this.removeAll();棋子颜色=1;
add(button);button.setBounds(10,5,60,26);
add(text_1);text_1.setBounds(90,5,90,24);
text_2.setText("");text_1.setText("请黑棋下子");
add(text_2);text_2.setBounds(290,5,90,24);
    }
}//负责创建黑色棋子的类：
class ChessPoint_black extends Canvas implements MouseListener
{
ChessPad chesspad=null;                  //棋子所在的棋盘
ChessPoint_black(ChessPad p)
{
setSize(20,20);chesspad=p;addMouseListener(this);
}
public void paint(Graphics g)
{
g.setColor(Color.black);g.fillOval(0,0,20,20);
}
public void mousePressed(MouseEvent e)
{
if(e.getModifiers()==InputEvent.BUTTON3_MASK)
{
chesspad.remove(this);            //当右击棋子时，从棋盘中去掉该棋子（悔棋）
chesspad.棋子颜色=1;
chesspad.text_2.setText("");chesspad.text_1.setText("请黑棋子下");
}
}
public void mouseReleased(MouseEvent e){}
public void mouseEetered(MouseEvent e){}
    public void mouseExited(MouseEvent e){}
    public void mouseClicked(MouseEvent e)
    {
     if(e.getClickCount()>=2)
        chesspad.remove(this);             //当双击该棋子时，吃掉该棋子
    }
}//负责创建白色棋子的类
class ChessPoint_white extends Canvas implements MouseListener
{
ChessPad chesspad=null;               
ChessPoint_white(ChessPad p)
{
setSize(20,20);addMouseListener(this);chesspad=p;
}
public void paint(Graphics g)
{
g.setColor(Color.white);g.fillOval(0,0,20,20);
}
public void mousePressed(MouseEvent e)
{
if(e.getModifiers()==InputEvent.BUTTON3_MASK)
{
chesspad.remove(this);            
chesspad.棋子颜色=-1;
chesspad.text_2.setText("请白棋子下");chesspad.text_1.setText("");
}
}
public void mouseReleased(MouseEvent e){}
public void mouseEetered(MouseEvent e){}
    public void mouseExited(MouseEvent e){}
    public void mouseClicked(MouseEvent e)
    {
     if(e.getClickCount()>=2)
        chesspad.remove(this);             //当双击该棋子时，吃掉该棋子
    }
}public class Chess extends Frame              //添加棋盘的窗口
{
ChessPad chesspad=new ChessPad();
Chess()
{
setVisible(true);
setLayout(null);
Label label=
new Label("单击左键下棋子，双击吃棋子，用右键单击棋子悔棋",Label.CENTER);
add(label);label.setBounds(70,90,440,400);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
pack();setSize(600,550);
}
public static void main(String arg[])
{
Chess chess=new Chess();
}
}