Are upper and lower bounds equivalent to rows and columns in Java 2D arrays?

Question

I've been having some issues trying to make sense of Java's 2D arrays. I've read about upper and lower bounds, are they equivalent to rows and columns or am I misinterpreting something? Thanks in advance.

Answer 1

int[][] arr = new int[x][y];

A two dimensional array is essentially an array of arrays. You could think of them as rows and columns, but they're really showing this:

arr = {{0, 1, 2}, {3, 4, 5}, {6, 7, 8}};

Which you can think of as:

0 1 2
3 4 5
6 7 8