Question

How to check if a matrix is symmetric (square matrix that is equal to its transpose) in Java

Answer 1

public class MyClass {
    private static boolean checkSymmetric(int[][] matrix) {
        int rows = matrix.length;
        int cols = matrix[0].length;
        
    	if (rows != cols) {
    		return false;
    	}
    
    	for (int i = 0; i < rows; i++) {
    		for (int j = 0; j < cols; j++) {
    			if (matrix[i][j] != matrix[j][i]) {
    				return false;
    			}
    		}
    	}
    
    	return true;
    }
    public static void main(String args[]) {
       	int[][] matrix =
            	{
            		{1, 5, 2, 4},
            		{5, 6, 3, 7},
            		{2, 3, 9, 0},
            		{4, 7, 0, 8}
            	};

        if (checkSymmetric(matrix)) {
		    System.out.print("yes");
	    }
	    else {
		    System.out.print("no");
	    }
    }
}





/*
run:
 
yes
 
*/

 

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