How to declare an array in java

Question

What does the below line of code mean? is it a legal way to declare or define an array. I googled it but couldn't find any information regarding this.

int[] []x[]

Answer 1

This is a valid line of code. It references a 3 dimensional integer array. Following codes are equivalent:

int[][][]x

int[][]x[]

int[]x[][]

int x[][][]

All of them are reference to a 3 dimensional integer array. You can declare a 10x10x10 size array like the following:

x = new int[10][10][10];