This is the java program to find out a given matrix is sparse matrix or not. Sparse matrix contains zero elements above a certain threshold. This threshold is given by (n*m)/2, where n and m are the rows and columns in matrix. Hence, if a matrix contains more than nm/2 mumber of zeros it is sparse matrix otherwise not.
Here is the source code of the Java Program to Check if it is a Sparse Matrix. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.
//This is a sample program to check whether the matrix is sparse matrix or not
//The complexity of the code is O(n^2)
public class Sparsity_Matrix
public static void main(String args)
Scanner sc = new Scanner(System.in);
System.out.println("Enter the dimensions of the matrix: ");
int m = sc.nextInt();
int n = sc.nextInt();
double mat = new double[m][n];
int zeros = 0;
System.out.println("Enter the elements of the matrix: ");
for(int i=0; i<m; i++)
for(int j=0; j<n; j++)
mat[i][j] = sc.nextDouble();
if(mat[i][j] == 0)
if(zeros > (m*n)/2)
System.out.println("The matrix is a sparse matrix");
System.out.println("The matrix is not a sparse matrix");
$ javac Sparsity_matrix.java $ java Sparsity_matrix Enter the dimensions of the matrix: 2 3 Enter the elements of the matrix: 1 0 0 2 1 1 The matrix is not a sparse matrix $ javac Sparsity_matrix.java $ java Sparsity_matrix Enter the dimensions of the matrix: 3 4 Enter the elements of the matrix: 1 0 0 0 0 1 0 0 0 0 1 1 The matrix is a sparse matrix
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