Graded Project
197
Note:
This code uses the enhanced
Graphics2D
class
to set the stroke thickness to more than one pixel. The
Oracle documentation provides more guidance on creat-
ing complex geometric shapes using the
Graphics2D
class at
http://docs.oracle.com/javase/tutorial/2d/
geometry/index.html.
Remember to import the
java.awt
and
javax.swing
packages!
5. In the
Board.java
file, have the
Board
class extend the
JPanel
class. This action will ensure that the board can
lay out each cell and process its UI events.
6. Make the following modifications to the
Board
constructor:
These changes will add each cell to the UI and assign an
ActionListener
object to each cell.
Note: Remember to import the
java.awt, java.awt.event,
and javax.swing
packages.
7. In the
TicTacToeGUIGame.java
file, have the
TicTacToeGUIGame
class extend
JFrame.
This action
will ensure that the game is hosted in a Java window.
8. Import the
games.board, java.awt,
and
javax.swing
packages.
g2.drawLine(offset, offset, this.getWidth() – offset , this.getHeight() – offset );
g2.drawLine(this.getWidth() – offset, offset , offset, this.getHeight()- offset);
break;
}
}
public Board(int rows, int columns, ActionListener ah) {
cells = new Cell[rows][columns];
this.setLayout(new GridLayout());
for( int r = 0; r < cells.length; r++ ) { for (int c = 0; c < cells[r].length; c++) { cells[r][c] = new Cell(r,c); this.add(cells[r][c]); cells[r][c].addActionListener(ah); } } } . Add the following code to the main method: SwingUtilities.invokeLater( new Runnable () { public void run() { new TicTacToeGUIGame(); } }); 10. Declare the following instance variables in TicTacToeGUIGame: private Board gb; private int turn; 11. Add the following method to handle each turn: private void takeTurn(Cell c) { Mark curMark = (turn++ % 2 == 0)? Mark.NOUGHT : Mark.CROSS; gb.setCell(curMark, c.getRow(), c.getColumn()); } 12. Define the following constructor to create the board, provide the event listener, and display the board in the window: private TicTacToeGUIGame() { gb = new Board(3, 3, new ActionListener() { public void actionPerformed(ActionEvent ae) { Cell c = (Cell) ae.getSource(); takeTurn(c); } }); this.add(gb); this.setDefaultCloseOperation(EXIT_ON_CLOSE); this.setTitle(“TIC-TAC-TOE”); this.setSize(300, 300); this.setVisible(true); } 13. Compile and run the project. Test to make sure each button displays a nought or cross when clicked