Write a java program to sum of Diagonal elements in matrix:

Write a java program to sum of Diagonal elements in matrix:

import java.util.Random;

import java.util.Scanner;

public class SumOfDiagonalElements {

public static void main(String[] args) {

int arr[][]=readmatrix();

dispMat(arr);

int sum[]=sumOfDiagonal(arr);

System.out.println("primary Diagonal element sum is : "+sum[0]);

System.out.println("Secondary Diagonal element sum is :"+sum[1]);

}

static int[] sumOfDiagonal(int mat[][]) {

int []sum=new int[2];

int n=mat.length;

for(int i=0;i<n;i++) {

for(int j=0;j<n;j++) {

if(i==j) {

sum[0]=sum[0]+mat[i][j];

}

if(i+j==n-1) {

sum[1]=sum[1]+mat[i][j];

}

}

} return sum;

}

static int[][] readmatrix(){

Random rx=new Random();

Scanner sc=new Scanner(System.in);

System.out.println("Enter Row size and column size :");

int row=sc.nextInt();

int col=sc.nextInt();

int mat[][]=new int[row][col];

System.out.println("Enter Elements in Table : ");

for(int i=0;i<row;i++) {

for(int j=0;j<col;j++) {

mat[i][j]=rx.nextInt(25);

}

sc.close();

}return mat;

}static void dispMat(int mat[][]) {

  for(int i=0;i<mat.length;i++) {

for(int j=0;j<mat[i].length;j++) {

System.out.print(mat[i][j]+" ");

}System.out.println();

}

  }

}