Java Reference
In-Depth Information
79
public
Cell() {
80 setBorder(
new
LineBorder(Color.black,
1
));
// Set cell's border
81
addMouseListener(
new
MyMouseListener());
// Register listener
register listener
82 }
83
84
/** Return token */
85
public char
getToken() {
86
return
token;
87 }
88
89
/** Set a new token */
90
public void
setToken(
char
c) {
91 token = c;
92 repaint();
93 }
94
95 @Override
/** Paint the cell */
96
protected void
paintComponent(Graphics g)
{
paint cell
97
super
.paintComponent(g);
98
99
if
(token ==
'X'
) {
100 g.drawLine(
10
,
10
, getWidth() -
10
, getHeight() -
10
);
101 g.drawLine(getWidth() -
10
,
10
,
10
, getHeight() -
10
);
102 }
103
else if
(token ==
'O'
) {
104 g.drawOval(
10
,
10
, getWidth() -
20
, getHeight() -
20
);
105 }
106 }
107
108
109 @Override
/** Handle mouse click on a cell */
110 {
111
// If cell is empty and game is not over
112
if
(token ==
' '
&& whoseTurn !=
' '
) {
113 setToken(whoseTurn);
// Set token in the cell
114
115
// Check game status
116
if
(isWon(whoseTurn)) {
117 jlblStatus.setText(whoseTurn +
" won! The game is over"
);
118 whoseTurn =
' '
;
// Game is over
119 }
120
else if
(isFull()) {
121 jlblStatus.setText(
"Draw! The game is over"
);
122 whoseTurn =
' '
;
// Game is over
123 }
124
else
{
125
// Change the turn
126 whoseTurn = (whoseTurn ==
'X'
) ?
'O'
:
'X'
;
127
// Display whose turn
128 jlblStatus.setText(whoseTurn +
"'s turn"
);
129 }
130 }
131 }
132 }
133 }
134 }
private class
MyMouseListener
extends
MouseAdapter {
listener class
public void
mouseClicked(MouseEvent e)
main
method omitted
The
TicTacToe
class initializes the user interface with nine cells placed in a panel of
GridLayout
(lines 19-22). A label named
jlblStatus
is used to show the status of the
game (line 14). The variable
whoseTurn
(line 8) is used to track the next type of token to be
