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我正在制作 BrickBreaker 游戏，由于未知原因，我遇到了一个令人讨厌的错误，我无法追踪。目前游戏状态：

破砖机

这是我想要做的：假设我点击上图中圈出的红色按钮。我希望红砖消失，红色上方的砖可以适当地占据位置。

到目前为止的代码：

private void moveBrick(BrickHolder brickHolder) {

    Point brickHolderLocation = brickHolder.getBrickHolderLocation();

    Brick containedBrick = getBrickByXAndY(brickHolderLocation.x, brickHolderLocation.y); // getting the Brick at that location

    if (containedBrick == null) {
        // If in any case there should be no brick at that position, just go on with the Brick above
        if (brickHolderLocation.y == 0) { // Should we be at the top row, there's no need to continue
            return;
        } else {
            BrickHolder nextBrickHolder = getPanelByXAndY(brickHolderLocation.x, brickHolderLocation.y - 1);
            moveBrick(nextBrickHolder);
        }
    }

    if (brickHolderLocation.y == 0) { // Should we be at the top row, there's no need to continue
        return;
    }

    // Removing the current Contained Brick
    brickHolder.remove(containedBrick);

    // Getting the Brick I want to move, normally hosted at the above Panel
    Brick theOneToBeMoved = getBrickByXAndY(brickHolderLocation.x, brickHolderLocation.y - 1);

    if (theOneToBeMoved == null) {
        // If in any case the Panel above doesn't contain a Brick, then continue with the Panel above.
        BrickHolder nextBrickHolder = getPanelByXAndY(brickHolderLocation.x, brickHolderLocation.y - 1);
        moveBrick(nextBrickHolder);
    }

    // Getting the Panel above the current one, so that we may move the Brick hosted there,
    // To the current Panel
    BrickHolder toHoldTheNewBrick = getPanelByXAndY(brickHolderLocation.x, brickHolderLocation.y - 1);

    brickHolder.add(theOneToBeMoved); // Moving the Brick at the current Panel
    toHoldTheNewBrick.remove(theOneToBeMoved); // Removing that same brick from the Panel above
    theOneToBeMoved.setBrickLocation(brickHolderLocation); // Setting the Brick's new location.

    // Since we have gotten so far, we assume that everything worked perfectly and that it's time to continue
    // with the Panel above
    BrickHolder theNextOne = getPanelByXAndY(brickHolder.getBrickHolderLocation().x, brickHolder.getBrickHolderLocation().y - 1);

    moveBrick(theNextOne);
}

从我所做的调试来看，我相信问题出在某个地方：

if (brickHolderLocation.y == 0) { // Should we be at the top row, there's no need to continue
            return;
        }

一些兴趣点：

  • Brick - 我创建的扩展 JButton 的类。而已。把它想象成一个带有背景的普通 JButton
  • BrickHolder - 我创建的用于托管 Bricks 的类。这个类扩展了 JPanel。唯一的添加是（点）位置变量，添加是为了更容易操作。

编辑：谢谢大家！您的评论和/或答案向我展示了继续前进的正确道路！

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1 回答 1

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我没有足够的评论点，所以这更像是一个建议，但如果你在最上面一行，你不还是想移走砖块吗？这与您在调试中发现的问题所在的区域相同。

于 2012-06-18T16:10:53.147 回答