Multi-Dimensional Array and ArrayIndexOutOfBoundsException

Question

Hello,

I have a strange problem which I can't fix:

A field:

private boolean[][][] gaps;

Constructor (1st line):

gaps = new boolean[NOBARRICADES][WIDTH][HEIGHT];

Constructor (2nd line):

for (int i = 0; i < NOBARRICADES; i++) {

Java throws an error for the 2nd line, saying:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException

Does it have anything to do with Java syntax (the mistake is in these lines of code) or I should look for the problem somewhere else?

Answer 1

You're probably misreading the error output. Your second line does not even access the array - make sure that it's not the first line of the body of the for-loop that throws the exception. Also, make sure that you use i only to index the first dimension of your array.

Answer 2

sometimes the java compiler is off by a line or two. You may check the lines of code around the line that it says the error is on and see if you see anything.

Answer 3

Sorry, but you really don't want to do that.

Multidimensional arrays are never worth the confusion they cause--they have no positive value at all (with the POSSIBLE exception of a clear, obvious x,y array).

I suggest you try starting with either a list of two-dimensional arrays or a two-dimensional array of objects where each object contains a list.