import java.awt.*;
import java.awt.event.*;
class ChessPad extends Panel implements MouseListener,ActionListener
{
	int x=-1,y=-1,棋子顏色=1;
	Button button = new Button("重新開(kāi)局");
	TextField text1=new TextField("請(qǐng)黑棋先下"),
	          text2=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(text1);text1.setBounds(90,5,90,24);
		add(text2);text2.setBounds(290,5,90,24);
		text1.setEditable(false);text2.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(棋子顏色==1)
						{
							this.add(chesspoint_black);
							chesspoint_black.setBounds(a*20-10,b*20-10,20,20);
							棋子顏色=棋子顏色*(-1);
							text2.setText("請(qǐng)白棋下子");
							text1.setText("");
							}
                                                 else if(棋子顏色==-1)
                                                 {
                                                    this.add(chesspoint_white);
							chesspoint_white.setBounds(a*20-10,b*20-10,20,20);
							棋子顏色=棋子顏色*(-1);
							text1.setText("請(qǐng)黑棋下子");
							text2.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();棋子顏色=1;
					add(button);button.setBounds(10,5,60,26);
					add(text1);text1.setBounds(90,5,90,24);
					text2.setText("");text1.setText("請(qǐng)黑棋下子");
					add(text2);text2.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.棋子顏色= 1;
						chesspad.text2.setText("");
						chesspad.text1.setText("請(qǐng)黑棋下子");
						
						}
					}
					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.棋子顏色=-1;
									chesspad.text2.setText("請(qǐng)白棋先下");
									chesspad.text1.setText("");
									}
								}
								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("單擊左鍵下棋子，雙擊吃棋子，用右鍵單擊棋子悔棋",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();
					}
			    	}