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Out of curiosity, how many dimensions of an array can you have in Java?
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Theoratically no limit. The only practical limits are memory size and compilers.
You could create a Sodoku hypercube with 4 dimensions and stores the numbers the user enters into a 4dimensional int array.
Array elements are accessed by the numeric indexes, with the first element stored at 0 indexes. There are basically two types of arrays in Java, i.e. one-dimensional and multi-dimensional arrays. 3D arrays fall under the category of multidimensional arrays.
Multidimensional arrays don't need to be conceptualised as rectangles, cubes, etc. There is another way of looking at them. A 2-dimensional array is a 1-dimensional array of equal-sized 1-dimensional arrays. A 3-dimensional array is a 1-dimensional array of 2-dimensional arrays.
The Java language does not limit the number of dimensions, but the Java VM spec limits the number of dimensions to 255.
For example, the following code will fail to compile:
class Main { public static void main(String[] args) { final int[][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] [][][][][][][][][][][][][][][][] x; } } with error:
1.java:18: error: array type has too many dimensions [][][][][][][][][][][][][][][][] x; ^ 1 error (Ref: https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.1 "An array type descriptor is valid only if it represents 255 or fewer dimensions.")
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