In this post we are going learn java sparse matrix or java program to check if it is a sparse matrix.

Sparse matrix java means a matrix having more 0 elements. For example,

#### Java program to check if it is a sparse matrix

- In java sparse matrix first declare and initialize two dimensional array and count number of rows and columns.
- Two “for loop” loops through given array and gets the total number of zeroes and stores in variable “total”.
- In the next step find size of the array.
- Now if the total is greater than size/2 it is a sparse matrix else it’s not a sparse matrix.

Now let’s see a program to determine whether a given matrix is a sparse matrix,

// java sparse matrix import java.util; public class SparseMatrix { public static void main(String[] args) { int rows, columns, size, total = 0; int arrNumber[][] = { {6, 0, 0}, {0, 9, 0}, {0, 0, 4} }; // calculating number of rows and columns rows = arrNumber.length; columns = arrNumber[0].length; // calculating size of array size = rows * columns; // counting zero elements for(int a = 0; a < rows; a++) { for(int b = 0; b < columns; b++) { if(arrNumber[a][b] == 0) { total++; } } } if(total > (size/2)) { System.out.println("It's a sparse matrix"); } else { System.out.println("Not a sparse matrix"); } } }

**Output:**

It’s a sparse matrix