二维数组对象有问题

Question

所以在我进一步编写代码之前，我想确保它正确打印出来。不幸的是，我似乎找不到在屏幕上打印出整个数组的代码。在我的 GameBoard 类中，mines[][] 和 tileCount[][] 应该在数组中的每个 apot 中都有某种值，所以它们应该能够正确输出这些值吗？在我的主要方法中，我尝试了几种不同的方法，唯一一种接近 deeptoString 但只输出空值（所以我的想法是数组仍未初始化？）一个矩阵（用户输入可以将其更改为任何内容），如果调用 mines[][] 将值也作为矩阵输出。 总的来说，我正在寻找一种将二维数组输出到屏幕上的方法。

    import java.util.Random;
    import java.util.Scanner;

public class GameBoard
{
    private int[][] mines;
    private char[][] tileCount;
    private int Row, Column; 
    Random random = new Random();
    Scanner input = new Scanner(System.in);

public GameBoard(int Row, int Column)
{
    Row = Row;
    Column = Column;
    mines = new int[Row][Column];
    tileCount = new char[Row][Column];        
    startMines();
    randomMines();
    fillTips();
    startBoard();

}
public void startMines(){
    for(int i=0 ; i<mines.length ; i++)
        for(int j=0 ; j<mines[0].length ; j++)
            mines[i][j]=0;

}

public void randomMines()
{
    boolean raffled; 
    int x = Row * Column;
    int tempRow, tempColumn;

    for(int i=0 ; i<x ; i++)
    { 
        tempRow = (int)(Math.random() + 1.0);
        tempColumn = (int)(Math.random() + 1.0);

        if(mines[tempRow][tempColumn] == 0)
        {
            mines[tempRow][tempColumn] = 11;
        }

    }
}

public void fillTips(){
    for(int i=1 ; i < Row ; i++)
        for(int j=1 ; j < Column ; j++){

            for(int x=-1 ; x<=1 ; x++)
                for(int y=-1 ; y<=1 ; y++)
                    if(mines[i][j] != -1)
                        if(mines[i+x][j+y] == -1)
                            mines[i][j]++;

        }

}

public void startBoard(){
    for(int i=1 ; i<mines.length ; i++)
        for(int j=1 ; j<mines.length ; j++)
            tileCount[i][j]= '_';

}

public String toString()
{
    System.out.println("\n     Row");
    System.out.print("Row: " + Row + "\nColumn: " + Column);
    for(int i = 1 ; i < Row ; i++){
        System.out.print("       "+Row + " ");

        for(int j = 1 ; j < Column ; j++){
            return "   "+ tileCount[i][j];
        }

        System.out.println();
    }

    return "\n            1   2   3   4   5   6   7   8\n                      Columns";

}

}

import java.util.Scanner;
import java.util.Arrays;
public class GameClient {
int grid;

public static void main(String args[]) {
    System.out.println("Welcome to the game minesweeper, I hope you enjoy your stay.");
    System.out.println("We will begin by asking how large you would like the game.");
    System.out.println("---------------------------------------------------------------");
    System.out.println("Input two values please: ");
    Scanner grid = new Scanner(System.in);
    int grid1 = grid.nextInt();
    int grid2 = grid.nextInt(); 
    double mineCount = ((grid1*grid2)*.25);
    System.out.println("Enter a number of mines, please 25% less than the total tiles which is " + mineCount);
    Scanner mineCounts = new Scanner(System.in);
    mineCount = mineCounts.nextInt();
    GameBoard[][] tileSize = new GameBoard[grid1][grid2];
    tileSize[0][0] = new GameBoard(grid1, grid2);      


    System.out.println(tileSize.toString());

    System.out.println(tileSize[0][0]);
    System.out.println(Arrays.deepToString(tileSize));





}

}

Answer 1

因为在初始化tileSize[0][0]时发生了异常。

查看我的日志：

Welcome to the game minesweeper, I hope you enjoy your stay.
We will begin by asking how large you would like the game.
---------------------------------------------------------------
Input two values please: 
100
10
Enter a number of mines, please 25% less than the total tiles which is 250.0
3
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
    at GameBoard.startBoard(GameBoard.java:67)
    at GameBoard.<init>(GameBoard.java:21)
    at GameClient.main(GameClient.java:19)

您的代码中有一个错误：

public GameBoard(int Row, int Column)
{
    Row = Row;
    Column = Column;
    .......
}

应该是：

public GameBoard(int Row, int Column)
{
    this.Row = Row;
    this.Column = Column;
    .....
}

方法fillTips中的另一个错误：

当 i 在最后一个循环中有一个数字 (Row - 1) 时，mines[i+x] 可能 mines[Row -1 + 1] 是 mines[Row] 并且会抛出异常(java.lang.ArrayIndexOutOfBoundsException) .

另一个错误...：

for(int j = 1 ; j < Column ; j++){
            return "   "+ tileCount[i][j];
        }

应该是：

for(int j = 1 ; j < Column ; j++){
            System.out.print( "   "+ tileCount[i][j]);
        }