What is an array to show 4X4?

An array of 4 times 8 is a 2D array with 4 Rows and 8 Columns.

// Declaration of a 2D array [ROWS] [COLUMNS]

int [][] arr = new int[4][8];

// What a 2D Array looks like populated with numbers

//

// _____________________

// Row 0 | 1 0 0 0 0 0 0 7

// Row 1 | 0 0 0 0 0 0 0 0

// Row 2 | 0 0 0 0 0 0 4 0

// Row 3 | 0 0 0 0 0 0 0 0

The example array above has the number 1 place in the first row of the first column.

In the first row of the eight column the number 7 is placed.

In the third row of the seventh column the number 4 is placed.

// Accessing these values

int one = arr[0][0];

int seven = arr[0][7];

int four = arr[2][6];