Demonstrate Multidimensional Arrays

package sanchez.julio;
 
/*
 Java Programming for Engineers
 Julio Sanchez
 Maria P. Canton
 
 
 ISBN: 0849308100
 Publisher: CRC Press
 */
 
// File name: MultiArray.java
//Reference: Chapter 6
//
//Java program to demonstrate multidimensional arrays
//Topics:
// 1. Simultaneous declaration and initialization
// 2. Use of the length operator to obtain the size
//    of multidimensional arrays
public class MultiArray {
    // Declare constants
    final static int ROWS = 10;
 
    final static int COLS = 5;
 
    public static void main(String[] args) {
 
	// Local varaibles
	int rowCount;
	int colCount;
	int totalSize;
 
	// Declare and allocate an array of bytes
	byte[][] screenPix = new byte[ROWS][COLS];
 
	// Obtain and store array dimensions
	rowCount = screenPix.length;
	colCount = screenPix[COLS].length;
	totalSize = rowCount * colCount;
 
	// To obtain the total number of elements of a
	// two-dimensional ragged array you need to get the size of
	// each array dimension separately
 
	// Display array dimensions
	System.out.println("Array row size:    " + rowCount);
	System.out.println("Array column size: " + colCount);
	System.out.println("Total size:        " + totalSize);
 
	// *************************
	// ragged arrays
	// *************************
	// First allocate the rows of an array
	byte[][] raggedArray = new byte[5][];
 
	// Now allocate the columns
	raggedArray[0] = new byte[2];
	raggedArray[1] = new byte[2];
	raggedArray[2] = new byte[4];
	raggedArray[3] = new byte[8];
	raggedArray[4] = new byte[3];
 
	// The resulting ragged array is as follows:
	// x x
	// x x
	// x x x x
	// x x x x x x x x
	// x x x
 
	// ************************************
	// static array initialization
	// ************************************
	byte[][] smallArray = { { 10, 11, 12, 13 }, { 20, 21, 22, 23 }, { 30, 31, 32, 33 }, { 40, 41, 42, 43 }, };
 
	// Display the array element at row 2, column 3
	System.out.println(smallArray[1][2]); // Value is 21
    }
}