Java编程

import java.awt.*;
import java.awt.event.*;
class ChessPad extends Panel implements MouseListener,ActionListener
{
	int x=-1,y=-1,棋子颜色=1;
	Button button=new Button("return");
	TextField text_1=new TextField("请黑子下棋"),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)
	{
		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 mousePressed(MouseEvent e)
	{
		if(e.getModifiers()==InputEvent.BUTTON1_MASK)
		{
			x=(int)e.getX();
			y=(int)e.getY();
			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)
			{}
			else
			{
				if(棋子颜色==1)
				{
					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)
				{
					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_1.setText("请黑棋下子");
					text_2.setText("");
				}
			}
		}
	}
	public void mouseReleased(MouseEvent e){}
	public void mouseEntered(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(90,5,60,24);
		text_2.setText("");
        text_2.setText("请黑棋下子");
		add(text_2);
		text_2.setBounds(290,5,90,24);
	}
}
class ChessPoint_black extends Canvas implements MouseListener
{
	ChessPad chesspad=null;
    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);
			 chesspad.棋子颜色=1;
			 chesspad.text_2.setText("");
			 chesspad.text_1.setText("请黑子下棋");
		}
	}
	public void mouseReleased(MouseEvent e){}
	public void mouseEntered(MouseEvent e){}
	public void mouseExited(MouseEvent e){}
	public void mouseClicked(MouseEvent e)
	{
		if(e.getClickCount()>=2)
			chesspad.remove(this);
	}
}
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("");
			 chesspad.text_1.setText("请白子下棋");
		}
	}
	public void mouseReleased(MouseEvent e){}
	public void mouseEntered(MouseEvent e){}
	public void mouseExited(MouseEvent e){}
	public void mouseClicked(MouseEvent e)
	{
		if(e.getClickCount()>=2)
			chesspad.remove(this);
	}
}
public class Chess extends Frame
{
	ChessPad chesspad=new ChessPad();
	Chess()
	{
		setVisible(true);
		setLayout(null);
		Label label=new Label("单击下子，双击吃子，右键后退",Label.CENTER);
		add(label);
		label.setBounds(70,55,440,26);
		label.setBackground(Color.orange);
		add(chesspad);
		chesspad.setBounds(70,90,440,440);
		addWindowListener(new WindowAdapter()
		{public void windowClosing(WindowEvent e)
			{System.exit(0);
			}
		});
		pack();
		setSize(600,550);
	}
	public static void main(String args[])
	{
		Chess chess=new Chess();
	}
}