我正在尝试编写代码，并且在用户输入y或yes（不区分大小写）到InputDialog之后，我尝试使用do while循环来循环我的主代码。
这里是代码，唯一的错误是a}需要在do之后放入{但是如果我把它放到我想要的地方，它就不起作用了，而且，它不会识别声明在底部，请帮忙。
package tictactoemain;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.LineBorder;
/**
* JFrame to hold TicTacToe board.
*/
public class TicTacToeFrame extends JFrame
{
**do {** //do starts here
private static final long serialVersionUID = 1L;
// Indicate whose turn it is
private char whoseTurn = 'X';
private boolean gameOver = false;
// Create cell grid using an Array
private Cell[][] cells = new Cell[3][3];
// Create a status label
JLabel jlblStatus = new JLabel("X's turn to play");
/**
* No-argument Constructor
* @return
*/
public TicTacToeFrame()
{
// Panel to hold cells
JPanel panel = new JPanel(new GridLayout(3, 3, 0, 0));
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
panel.add(cells[i][j] = new Cell());
panel.setBorder(new LineBorder(Color.black, 1));
jlblStatus.setBorder(new LineBorder(Color.black, 1));
add(panel, BorderLayout.CENTER);
add(jlblStatus, BorderLayout.SOUTH);
}
// Determine if it's a tie
/**
* Determine if game board is full.
* @return True, if game board is full. Otherwise, false.
*/
public boolean isFull()
{
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
if (cells[i][j].getToken() == ' ')
return false;
return true;
}
// Check to see if a player (Token) has won
/**
* Determines if a given token has won.
* @param token Token to test for winning
* @return True, if the token has won. Otherwise, false.
*/
public boolean isWon(char token)
{
// check rows
for (int i = 0; i < 3; i++)
if ((cells[i][0].getToken() == token)
&& (cells[i][1].getToken() == token)
&& (cells[i][2].getToken() == token))
{
return true;
}
// check columns
for (int j = 0; j < 3; j++)
if ((cells[0][j].getToken() == token)
&& (cells[1][j].getToken() == token)
&& (cells[2][j].getToken() == token))
{
return true;
}
// check diagonals
if ((cells[0][0].getToken() == token)
&& (cells[1][1].getToken() == token)
&& (cells[2][2].getToken() == token))
{
return true;
}
if ((cells[0][2].getToken() == token)
&& (cells[1][1].getToken() == token)
&& (cells[2][0].getToken() == token))
{
return true;
}
return false;
}
/**
* Defines a cell in a TicTacToe game board.
*/
public class Cell extends JPanel
{
/**
*
*/
private static final long serialVersionUID = 1L;
// token of this cell
private char token = ' ';
/**
* Constructor
*/
public Cell()
{
setBorder(new LineBorder(Color.black, 1));
addMouseListener(new MyMouseListener());
}
/**
* Gets the token of the cell.
* @return The token value of the cell.
*/
public char getToken()
{
return token;
}
/**
* Sets the token of the cell.
* @param c Character to use as token value.
*/
public void setToken(char c)
{
token = c;
repaint();
}
@Override
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
if (token == 'X')
{
g.drawLine(10, 10, getWidth() - 10, getHeight() - 10);
g.drawLine(getWidth() - 10, 10, 10, getHeight() - 10);
}
else if (token == 'O')
{
g.drawOval(10, 10, getWidth() - 20, getHeight() - 20);
}
}
// MouseListener to listen for a click to place a token
private class MyMouseListener extends MouseAdapter
{
private String playAgain;
private Object playYes;
private Object playNo;
@Override
public void mouseClicked(MouseEvent e)
{
if (gameOver)
return;
// if condition not met, the game is not over
if (token == ' ' && whoseTurn != ' ')
setToken(whoseTurn);
// Check game status
if (isWon(whoseTurn))
{
jlblStatus.setText("Congratulations " + whoseTurn + ", You Are Winnner! Game Over! Exit And Restart The Program To Play Again!" );
whoseTurn = ' ';
gameOver = true;
}
else if (isFull())
{
jlblStatus.setText("Tie game! Game over!");
whoseTurn = ' ';
gameOver = true;
}
else
{
whoseTurn = (whoseTurn == 'X') ? 'O' : 'X';
jlblStatus.setText(whoseTurn + "'s turn to play.");
}
// and ends here, while statement is below
{
// if the game is over, this will run
if (gameOver == true)
playAgain = JOptionPane.showInputDialog("Would you like to play again?");
// if statement that either restarts the game or closes it depending on the yes/y (cases are ignored) answer
while (playAgain.equalsIgnoreCase("y") | playAgain.equalsIgnoreCase("yes"))
{
playYes = ("Yes? Okay, have fun!");
JOptionPane.showMessageDialog( null, playYes );
}
}
}// End of Win condition checker
} // End class MyMouseListener
}
} // End class TicTacToeFrame
答案 0 :(得分：0)
您可以从单个方法初始化所有变量。通过这种方式，您可以在程序开始时使用它初始化游戏，如果玩家再次请求玩游戏，您可以调用相同的方法，从而使程序恢复到原始状态。
private void init() {
whoseTurn = 'X';
gameOver = false;
jlblStatus = new JLabel("X's turn to play");
for(Cell[] ca : cells) {
for(Cell c : ca) {
c.setToken(' ');
}
}
}
我的示例可能不包含所有变量，但您可以调整它以满足您的需求。
无法识别do-while循环，因为它在方法之外。