how does java handle 2d array code example

Example 1: accessing 2d array in java

(m x n matrix) - (2 x 3 matrix)  
m	n ------------------ >
|	a[0][0] a[0][1] a[0][2]
v	a[1][0] a[1][1] a[0][2]

Example 2: 2d array java

char[][] array = new int[rows][columns];