我正在尝试创建一个游戏TicTacToe的程序。我已经完成了创作 所有的方法，我只需要创建驱动程序。在创建之前 驱动程序，我试图只打印一个字符板，但我没有 认为我的方法是正确的。这是我的错误：
java.lang.ArrayIndexOutOfBoundsException: 3
at TicTacToeBoard.move(TicTacToeBoard.java:75)
at TicTacToe.main(TicTacToe.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:271)
以下是我的两个程序：
这是我的驱动程序，我似乎无法完成。最后一件事就是 模板，以便您了解每个程序的工作原理。
class TicTacToe
{
public static void main(String [] args)
{
//System.out.println("Welcome! Tic-Tac-Toe is a two player game.");
//System.out.println("Enter player one's name: ");
TicTacToeBoard game = new TicTacToeBoard();
System.out.println(game.toString());
//int count = 0;
game.move('x', 1, 3);
// game.move('o', 1, 1);
/* while (game.gameWon() !true || count != 9)
{
System.out.print(game.move());
System.out.print(game.isEmpty());
}*/
}
}
这就是所有方法......
class TicTacToeBoard
{
private char [][] board = new char[3][3];
String b;
// This a new constructor that creates a tic-tac-toe board
public TicTacToeBoard()
{
for (int rows = 0; rows < board.length; rows++)// creates rows
{
for (int columns = 0; columns <board[rows].length;columns++)// creates columns
{
//System.out.println("| ");
board[rows][columns] = ' ';
//System.out.println(" |\n" );
}
}
}
// creates a string form of the tic-tac-toe board and allows the user
// to access it during the game.
public String toString()
{
String b = "";
// creates a vertical bar at the beginning and the end of each row
for (int rows = 0; rows < board.length; rows++)
{
b += "| ";
// adds a space for each row and column character in tic-tac-toe board.
for (int columns = 0; columns < board[rows].length; columns++)
{
b += board[rows][columns] + " ";
}
b += "|\n";// prints a | space space space | and breaks off to create two new lines.
}
return b; // prints the tic-tac-toe board to be accessed by the user.
}
String move(char x, int rows, int columns)
{
String b = "";
// creates a vertical bar at the beginning and the end of each row
for (int r = 0; r < board.length; r++)
{
b += "| ";
for (int c = 0; c < board[r].length; c++)
{
b += board[r][c] + " "; //prints 3 spaces on each line.
// prints string character from user input if row and column not equal to zero
if (board[rows - 1][columns - 1] >= 0 && board[rows - 1][columns - 1] <= 2 )
{
board[rows - 1][columns - 1] = x;// prints character in the specified index from user input
b += board[rows - 1][columns - 1];// prints out the board and the new character in specified space.
}
else if (board[rows - 1][columns - 1] < 0) // makes user pick another choice
return "ILLEGAL MOVE, TRY AGAIN!";
// adds a space for each row and column character in tic-tac-toe board.
}
b += "|\n";// prints a | space space space | and breaks off to create two new lines.
}
return b; // prints the tic-tac-toe board to be accessed by the user.
}
// checks if a space character is empty
void isEmpty(char x, int row, int col)
{
if (board [row - 1][col - 1] == ' ')
board[row - 1][col - 1] = x;
else // makes user pick another row and column if space character is not empty
System.out.println("ILLEGAL CHOICE, PICK AGAIN!");
}
// checks if game is won
public boolean gameWon(int row, int col)
{
if ((board[2][0] == board[1][1]) && (board[2][0] == board[0][2]))
return true;
else if ((board[2][0] != board[1][1]) && (board[2][0] != board[0][2]))
return false;
if ((board[2][2] == board[1][1])&& (board[2][2] == board[0][0]))
return true;
else if ((board[2][2] != board[1][1])&& (board[2][2] != board[0][0]))
return false;
if ((board[0][0] == board[1][0]) && (board[0][0] == board[2][0]))
return true;
else if ((board[0][0] != board[1][0]) && (board[0][0] != board[2][0]))
return false;
if ((board[0][1] == board[1][1]) && (board[0][1] == board[2][1]))
return true;
else if ((board[0][1] != board[1][1]) && (board[0][1] != board[2][1]))
return false;
if ((board[0][2] == board[1][2]) && (board[0][2] == board[2][2]))
return true;
else if ((board[0][2] != board[1][2]) && (board[0][2] != board[2][2]))
return false;
if ((board[0][0] == board[0][1]) && (board[0][0] == board[0][2]))
return true;
else if ((board[0][0] != board[0][1]) && (board[0][0] != board[0][2]))
return false;
if ((board[1][0] == board[1][1]) && (board[1][0] == board[1][2]))
return true;
else if ((board[1][0] != board[1][1]) && (board[1][0] != board[1][2]))
return false;
if ((board[2][0] == board[2][1]) && (board[2][0] == board[2][2]))
return true;
else
return false;
}
}
这是整个事情的模板!!!!!
class TicTacToe
{
public static void main (String [] args)
{
TicTacToeBoard b = new TicTacToeBoard();
while (game not over)
{
swtich player
increment turn counter
until user enters a valid move
{
prompt for move
}
make move
b.makeMove (player, row, col);
print board
System.out.println(b);
}
print outcome
}
}
class TicTacToeBoard
{
private char [][] board = ...;
public TicTacToeBoard()
{
initialize board with spaces
}
public void makeMove (char c, int row, int col)
{
store symbol in specified position
}
public boolean isEmpty(int row, int col)
{
return true if square is unfilled
}
public boolean gameWon()
{
check board for a win
}
public String toString ()
{
return String representation of board
}
}
答案 0 :(得分：4)
编程语言对于错误是无法容忍的，并且会对我们施加严格和谨慎。
您的代码很难让我们阅读，因此我们和您都需要进行调试，从您的缩进开始，但也有粗心的错误，特别是这一个：
for (int r = 0; r < board.length; rows++)
你看到这里有什么问题吗？ r与rows不同，您不能使用一个作为循环的索引，然后增加另一个。你在循环中使用这两个变量。代码中还有其他一些粗心的错误。
我建议你重新开始，但要小心你的代码，并特别小心你的缩进。如果你没有正确地排列花括号，你将看不到一个代码块何时结束而另一个代码块何时开始（我们也不会！）。
哦，下次，请告诉我们您的代码中哪些行导致了您的错误。如果我们不必猜测这些信息，那么帮助您会更容易。
修改
你的新代码缩进是更好的，但仍然是关闭。这就是你所拥有的：
String move(char x, int rows, int columns)
{
String b = "";
// creates a vertical bar at the beginning and the end of each row
for (int r = 0; r < board.length; r++)
{
b += "| ";
for (int c = 0; c < board[r].length; c++)
{
b += board[rows][columns] + " ";
这就是我的建议：
String move(char x, int rows, int columns) {
String b = "";
// creates a vertical bar at the beginning and the end of each row
for (int r = 0; r < board.length; r++) {
b += "| ";
for (int c = 0; c < board[r].length; c++) {
// let's check to see what the variables hold!
System.out.printf("rows: %d, columns %d, r: %d, c: %d%n", rows, columns, r, c);
b += board[rows][columns] + " "; // **** the offending line ****
更重要的是，请注意printf语句的结果，紧接着是异常：
rows: 1, columns 3, r: 0, c: 0
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
所以这里是列变量，其值为3并导致数组爆炸。您需要跟踪以查看您如何调用此方法以及为何将3传递到列parmaeter中。
编辑2
在重新审核您的最新帖子时，您仍然难以编写移动方法以接受3作为列参数：
game.move('x', 1, 3);
首先解决这个问题。该参数不能为3。