Java Multidimensional Array
What is Java Multidimensional Array?
In Java multidimensional array has more than one dimension. It can be thought of as an array of arrays.
A two-dimensional array is a common example of a multidimensional array, where each element of the array contains an array of elements.
To understand the Java Multidimensional Array, Read the Complete Article.
Types of Multi dimensional Array
In Java, arrays can have one or more dimensions, allowing you to store and access multiple values using a single variable. Here are examples of one-dimensional, two-dimensional, and three-dimensional arrays in Java:
One dimensional Array:
A one-dimensional array is the simplest type of array in Java. It is a collection of elements of the same data type that can be accessed using a single index.
Here is an example of how to declare, initialize, and access a one-dimensional array:
int[] numbers = {1, 2, 3, 4, 5};
System.out.println(numbers[2]); // Output: 3
Two dimensional Array:
A two-dimensional array is an array of arrays. It is used to represent a table or grid of elements, with rows and columns.
Here is an example of how to declare, initialize, and access a two-dimensional array:
int[][] matrix = {{1, 2}, {3, 4}, {5, 6}};
System.out.println(matrix[1][0]); // Output: 3
Three dimensional Array:
A three-dimensional array is an array of arrays of arrays. It can be thought of as a cube of elements, with layers, rows, and columns. Here is an example of how to declare, initialize, and access a three-dimensional array:
int[][][] cube = {
{{1, 2}, {3, 4}},
{{5, 6}, {7, 8}},
{{9, 10}, {11, 12}}
};
System.out.println(cube[2][1][0]); // Output: 11
Let’s look at the Java Multi Dimensional Array to perform certain operations.
Example 1: Java program to create one dimensional Array:
Run
//OneDimensionalArrayExample
public class Main {
public static void main(String[] args) {
// Create an array of integers with length 5
int[] numbers = new int[5];
// Assign values to the array
numbers[0] = 1;
numbers[1] = 3;
numbers[2] = 5;
numbers[3] = 7;
numbers[4] = 9;
// Print the values in the array
for (int i = 0; i < numbers.length; i++) {
System.out.println("Element at index " + i + " is " + numbers[i]);
}
}
}
Output
Element at index 0 is 1 Element at index 1 is 3 Element at index 2 is 5 Element at index 3 is 7 Element at index 4 is 9
Explanation:
create an integer array numbers with a length of 5. We then assign values to each element of the array using the index notation, starting from index 0. Finally, we use a for loop to print out the values in the array. The loop iterates from 0 to the length of the array - 1, accessing each element using the index notation.
Example 2 : Java Program to create two dimentional array
Run
public class Main
{
public static void main (String[]args)
{
// Create a two-dimensional array with 3 rows and 5 columns
int[][] arr =
{ {50, 60, 65, 70, 75}, {52, 57, 62, 67, 72}, {78, 83, 88, 93, 97} };
// Print the values of the array
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
System.out.print (arr[i][j] + " ");
}
System.out.println ();
}
}
}
Output
50 60 65 70 75 52 57 62 67 72 78 83 88 93 97
Explanation:
In this program, we create a two-dimensional array arr with 3 rows and 5 columns using the statement int[][] arr = {{50, 60, 65, 70, 75}, {52, 57, 62, 67, 72}, {78, 83, 88, 93, 97}};
Example 3 : Java Program to create three dimentional array:
Run
public class Main
{
public static void main (String[]args)
{
// Create a three-dimensional array with 2 layers, 3 rows, and 4 columns
int[][][] arr = {
{{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}},
{{13, 14, 15, 16}, {17, 18, 19, 20}, {21, 22, 23, 24}}
};
// Print the values of the array
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
for (int k = 0; k < arr[i][j].length; k++)
{
System.out.print (arr[i][j][k] + " ");
}
System.out.println ();
}
System.out.println ();
}
}
}
Output
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Explanation:
In this program, we create a three-dimensional array arr with 2 layers, 3 rows, and 4 columns using the statement int[][][] arr = {{{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}}, {{13, 14, 15, 16}, {17, 18, 19, 20}, {21, 22, 23, 24}}};. Then, we print the values of the array using nested loops.
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