import java.awt.event.*;
import javax.swing.JOptionPane;
public class Chess extends Frame {
ChessPad chesspad= new ChessPad();
Chess() {
add(chesspad);
chesspad.setBounds(70,90,440,440);
Label label=new Label(\"click to point,doubled_click to remove,right click to back\ add(label);
label.setBounds(70,55,440,24); label.setBackground(Color.orange);
addWindowListener (
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0); } } );
setLayout(null); setVisible(true); setSize(600,550); }
public static void main(String args[]) {
Chess chess=new Chess(); } }
class ChessPad extends Panel implements MouseListener, ActionListener,FocusListener {
int x = -1, y = -1, chessColor = 1;
String blackname=\"\
Button button=new Button(\"start\");
Button inputButton=new Button(\"input\");
TextField text_1=new TextField(\"black please\"), text_2=new TextField(\"\"),//white please text_3=new TextField(\"black'name\"), text_4=new TextField(\"white'name\");
ChessPad() {
add(inputButton);
inputButton.setBounds(35,5,60,26); inputButton.addActionListener(this); inputButton.addFocusListener(this);
add(text_3);
text_3.setBounds(115,5,90,24); text_3.addFocusListener(this); text_3.setEditable(true);
add(text_4);
text_4.setBounds(315,5,90,24); text_4.addFocusListener(this); text_4.setEditable(true);
add(button);
button.setBounds(35,36,60,26); button.setEnabled(false);
button.addActionListener(this);
add(text_1);
text_1.setBounds(115,36,90,24); text_1.setEnabled(false); text_1.setEditable(false);
add(text_2);
text_2.setBounds(315,36,90,24); text_2.setEnabled(false); text_2.setEditable(false);
setSize(440,440);
setLayout(null);
setBackground(Color.orange); addMouseListener(this); }
public void paint(Graphics g) {
for(int i=80;i<=400;i=i+20) {
g.drawLine(40,i,400,i); }
g.drawLine(40,420,400,420);
for(int j=40;j<=380;j=j+20) {
g.drawLine(j,80,j,420); }
g.drawLine(400,80,400,420);
g.fillOval(97,137,6,6); g.fillOval(337,137,6,6); g.fillOval(97,377,6,6); g.fillOval(337,377,6,6); g.fillOval(217,257,6,6); }
public void focusGained(FocusEvent e) {
Component com=(Component)e.getSource(); if(com==text_3) {
text_3.setText(\"\"); }
else if(com==text_4) {
text_4.setText(\"\"); } }
public void focusLost(FocusEvent e) { }
public void mousePressed(MouseEvent e)
{
if(blackname.length()==0||whitename.length()==0) {
JOptionPane.showMessageDialog(this,\"please input the player's name,and click input button before you start chess!\ }
else if(blackname.equals(\"black'name\")) {
JOptionPane.showMessageDialog(this,\"please input the black player's name,and click input button\ }
else if(whitename.equals(\"white'name\")) {
JOptionPane.showMessageDialog(this,\"please input the white player's name,and click input button\ }
else if(e.getModifiers()==InputEvent.BUTTON1_MASK) {
x = (int)e.getX(); y = (int)e.getY();
int a=(x+10)/20,b=(y+10)/20;
ChessPoint_black chesspoint_black=new ChessPoint_black(this); ChessPoint_white chesspoint_white=new ChessPoint_white(this);
if(x/20<2||y/20<4||x/20>19||y/20>20) { } else {
if(chessColor==1) {
this.add(chesspoint_black);
chesspoint_black.setBounds(a*20-10,b*20-10,20,20); chessColor=chessColor*(-1);
text_2.setText(this.whitename+\" please\"); text_1.setText(\"\");
}
else if(chessColor==-1) {
this.add(chesspoint_white);
chesspoint_white.setBounds(a*20-10,b*20-10,20,20); chessColor=chessColor*(-1);
text_1.setText(this.blackname+\" please\"); 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) {
if(e.getSource()==inputButton) {
blackname=text_3.getText(); whitename=text_4.getText();
if(blackname.length()==0||whitename.length()==0) {
JOptionPane.showMessageDialog(this,\"you did not
complete the
information!\ }
else if(blackname.equals(\"black'name\")) {
JOptionPane.showMessageDialog(this,\"please name\ }
else if(whitename.equals(\"white'name\")) {
JOptionPane.showMessageDialog(this,\"please name\ } else {
inputButton.setEnabled(false); text_3.removeFocusListener(this); text_3.setEnabled(false); text_4.setEnabled(false); button.setEnabled(true); text_1.setEnabled(true);
text_1.setText(blackname+\" please\"); text_2.setEnabled(true); } }
else if(e.getSource()==button) {
inputButton.setEnabled(true); text_3.setEnabled(true); text_4.setEnabled(true); button.setEnabled(false); text_1.setEnabled(false); text_2.setEnabled(false);
this.removeAll();
chessColor=1;
add(button);
button.setBounds(35,36,60,26);
add(text_1);
text_1.setBounds(115,36,90,24); text_1.setText(\"black please\");
input the input the black player's
white player's
add(text_2);
text_2.setBounds(315,36,90,24); text_2.setText(\"\");
add(inputButton);
inputButton.setBounds(35,5,60,26);
add(text_3);
text_3.setText(\"black'name\"); text_3.addFocusListener(this); text_3.setBounds(115,5,90,24);
add(text_4);
text_4.setText(\"white'name\"); text_4.setBounds(315,5,90,24);
blackname=\"\"; whitename=\"\"; } } }
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.chessColor=1;
chesspad.text_2.setText(\"\");
chesspad.text_1.setText(chesspad.blackname+\" please\"); } }
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); chesspad=p;
addMouseListener(this); }
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.chessColor=-1;
chesspad.text_1.setText(\"\");
chesspad.text_2.setText(chesspad.whitename+\" please\"); } }
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); } } }
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