Introducing Arrays - JAVA Programming for Engineers - page 56

// 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 variables
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: