我如何停止此"IndexOutOfBoundsException"；问题? [英] how do i stop this "IndexOutOfBoundsException" issue?

问题描述

因此，我该应用程序允许用户在网格上放置块，如果用户将3个或更多具有相同颜色或颜色的块排列在一起，则会发生某些情况.当玩家放置一个方块时，我调用此方法:

So I the app lets a user place down blocks on a grid, if the user lines up 3 or more blocks with the same suit, or color, then something happens. When player places a block I call this method:

   blocks_.add(new Block(new Vector2(rect_mouse.x, rect_mouse.y), blocks_.get(0).blockID, blockCount)); 

当您将3个或更多放置在一起时，我将调用以下方法:

When you place 3 or more together I call these methods:

    blocks_.removeValue(blocks_.get(left_bravo_indexNum), true);
    blocks_.removeValue(blocks_.get(center_charlie_indexNum), true);
    blocks_.removeValue(blocks_.get(right_alpha_indexNum), true);


    stack:
    Exception in thread "LWJGL Application" java.lang.IndexOutOfBoundsException: 13
at com.badlogic.gdx.utils.Array.get(Array.java:125)
at com.jrp.mygearapp.GameScreen.touchUp(GameScreen.java:1443)
at com.badlogic.gdx.backends.lwjgl.LwjglInput.processEvents(LwjglInput.java:297)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:186)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:110)

这旨在删除这些块，但导致此IndexOutOfBoundsException.有办法防止此错误吗?

This was intended to remove the blocks, but it resulted in this IndexOutOfBoundsException. Is there a way to prevent this error?

之所以会发生这种情况，是因为数组会自动对元素数量进行排序，并将数量减少到数组中元素的正确数量，而我仍然有一些元素被标记为高于数组的大小.我仍然是新手，因此我的分析可能不正确.如果是这种情况，请提醒我，并帮助我找到解决方法. 谢谢.

This could be occurring because the array auto sorts the number of elements and lowers the number to the correct number of elements in the array, and I still have elements that are labeled higher then the size of the array. I am still a novice, so my analysis could be incorrect. Please alert me if this is the case and help me find a fix. Thanks.

编辑 * TouchUp()函数-------

edirted* TouchUp() function-------

   @Override
     public boolean touchUp(int x, int y, int pointer, int button) {

    if (button == 0)  {

        display_blockCheck = false;

        ////set blockCount to the size of blockArray so blocks can properly be indexed              
        blockCount = blocks_.size;

        if (!overlap) {

            Gdx.app.log("Block Added", "x: " + x + " y: " + y);

            updateQueueBlocks();


            //add block
            Vector2 rect_vector = new Vector2(rect_mouse.x, rect_mouse.y);
            Block block = new Block(rect_vector,blocks_.get(0).blockID, blocks_.size);

            blocks_.add(block);             

     if (center_charlie_suit == "Square") {

                center_charlie_bool = true;

                if (right_bravo_suit == "Square") {

                    right_bravo_bool = true;

                    if (right_alpha_suit == "Square") {

                        Gdx.app.log("3-pair", "Square:345:lr");

                        right_alpha_bool = true;

                        //call 3-pair event
                        blocks_.removeValue(blocks_.get(center_charlie_indexNum), true);
                        blocks_.removeValue(blocks_.get(right_alpha_indexNum), true);
                        blocks_.removeValue(blocks_.get(right_bravo_indexNum), true);
                        }
                }
            }

其余的部分真的很长，只检查彼此相邻的其他块.

the rest is just really long and just checks for other blocks next to each other..

推荐答案

您是对的，在删除块时，索引会更改.

You're right, as you remove the blocks, the indexes change.

您没有显示Collection blocks_的类型(Vector2 ?，您写的是吗?)，但是，不是跟踪元素的索引，而是跟踪元素本身并调用remove()来查找并删除该元素.

You don't show what type of Collection blocks_ is (Vector2?, did you write it?), however, rather than tracking the indices of the elements, simply track the elements themselves and call remove() to find and remove that element.

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