Question

我正在用java创建一个基本的连接4游戏为此我创建了一个2d数组，board [] []大小为8 * 8.

为了让它看起来像个不错的游戏，我想让它看起来好像是玩家的代币通过列落到占用网格上方的空间。

但是，我编写的代码会生成ArrayIndexOutOfBoundsException。请检查下面的代码并告诉我哪里出错了。

int a[] = {0,0,0,0,0,0,0,0};//stores the no. of empty space in each column
char board[][] = new char [8][8];
System.out.println("\n        >>>-\\/->>> ENTER THE COLUMN NUMBER : PLAYER "+current_player+"  :PLAYER TOKEN :"+current_player_token);
colno=Integer.parseInt(br.readLine());
tmp=a[colno-1];

//this will do the printing and initiate the falling effect only till the time required
for (k=0 ; k<7-tmp ; k++ )//k here represents the loop control variable that determines how long the element will seem to fall until it reaches the empty space 
{
    System.out.print("\f");
    System.out.println("            1         2         3         4           5         6         7         8        -COLUMN");
    for( i=0 ; i<8 ; i++ )
    {
        System.out.print("       ");
        for( k=1;k<=9;k++)
            System.out.print("---------");
        System.out.println();
        System.out.println();
        System.out.print("       |");
        for ( j=0 ; j<8 ; j++ )
        {
            System.out.print("    "+board[i][j]+"    |");
        }
        System.out.println();
        System.out.println();
    }
    System.out.print("       ");
    for(k=1;k<=9;k++)
        System.out.print("---------");
    //the lines below generates an ArrayIndexOutOfBoundsException
    board[k][colno-1]=current_player_token;
    if(k!=0)
    {   
        board[k-1][colno-1]=' ';
    }

Answer 1

异常在以下行生成：

board[k][colno-1]=current_player_token;

导致您的for循环以k = 1开头并以k = 8结尾。但是你的电路板的大小为8，因此索引从0到7.当你拨打board[8]时，它会失败。

如何在java中的2D数组中启动下降元素效果？

1 个答案: