当我询问的数组索引不超出范围时,ArrayIndexOutOfBoundsException

Question

我一直存在的问题是它说java.lang.ArrayIndexOutOfBoundsException:165

165是它实际应包含的值的数量.

我尝试将整数数组的长度更改为更大的数字,但它一直给我错误,无论是更大的数字.

我把所有内容都打印出来,看看问题是否可能是我的for循环,但是那里的一切似乎都很好(165个阵列中有正确的数字)

我看不出问题出在哪里.

public int[][] getTilePositionsIn(int pixelLeft, int pixelBottom, int pixelRight, int pixelTop){
    int starterTileX = pixelLeft/getTileLength();
    if (starterTileX < 0)
        starterTileX = 0;
    System.out.println(starterTileX);
    int starterTileY = pixelBottom/getTileLength();
    if (starterTileY < 0)
        starterTileY = 0;
    System.out.println(starterTileY);
    int tileLength = getTileLength();
    int blockWidth = pixelRight - pixelLeft + 1;
    int widthInTiles = blockWidth/tileLength +1;
    int blockHeight = pixelTop - pixelBottom + 1;
    int heightInTiles = blockHeight/tileLength +1;
    int numberOfTiles = widthInTiles * heightInTiles;
    System.out.println(widthInTiles);
    System.out.println(heightInTiles);
    System.out.println(numberOfTiles);
    int[][] tiles = new int[numberOfTiles][2];

    for (int y = 0; y <= heightInTiles; y++) {
        for (int x = 0; x <= widthInTiles; x++) {
            int index = y*widthInTiles + x;
            System.out.println(index);
            tiles[index][0] = x;
            tiles[index][1] = y;
            System.out.println(Arrays.toString(tiles[index]));
        }
    }
    return tiles;
}

Answer 1

我一直存在的问题是它说java.lang.ArrayIndexOutOfBoundsException:165

165是它实际应包含的值的数量.

右 - 然后索引165超出范围.

Java中的数组是从0开始的,因此如果数组有165个值,则有效索引为0到164(含).

你的for循环应该使用<而不是<=边界:

for (int y = 0; y < heightInTiles; y++) {
    for (int x = 0; x < widthInTiles; x++) {