Mega Code Archive
Java program to demonstrate multidimensional arrays
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/*
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
}
}
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