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Thread: Trying to understand what boolean[][][] is

  1. #1
    Junior Member
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    Default Trying to understand what boolean[][][] is

    As the title says I'm trying to figure out how boolean[][][] works. I've got some code i was trying to understand, but I've never seen this before as I've only been doing java for a month.
    Here is a snippet of the code I'm trying to figure out.
         int goal;
         boolean[][][] computed;
         double[][][] p;
         boolean[][][] roll;
         computed = new boolean[goal][goal][goal];
         if (computed[i][j][k]) return p[i][j][k];
    Last edited by JB4times4; August 29th, 2011 at 04:56 PM.

  2. #2
    Administrator copeg's Avatar
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    Default Re: Trying to understand what boolean[][][] is

  3. #3
    Super Moderator Sean4u's Avatar
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    Tavistock, UK
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    Default Re: Trying to understand what boolean[][][] is

    An old version of something I wrote once implemented a 3D grid laid out in layers, rows and columns. At each point in the grid a value was either true or false, and I used boolean[][][] to represent it. To get or set the value of a point in the 3D grid, I once coded this:
    boolean[][][] example;
    // set a single point (2, 1, 4) in the 3D space
    example[2][1][4] = false;
    Watch out for nested arrays in Java (it doesn't have multidimensional arrays) - your example may look like a cuboid 3D space, but in Java boolean[][][] is an array of arrays of boolean arrays. Each individual array can have a different length.

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