Java Program to Accept a Matrix of Order M x N & Interchange the Diagonals

Problem Description: Write a Java program that accepts a matrix of M × N order and then interchange diagonals of the matrix.

Steps:  

1. We can only interchange diagonals for a square matrix.

2. Create a square matrix of size [M × M].

3. Check the matrix is a square matrix or not. If the matrix is square then follow step 3 else terminate the program.

4. Apply logic for interchange diagonal of the matrix some logic is given below.

Method 1: Swap element a[i][i] and a[i][n - i -1]

               for (j = 0; j < m; j++) {

               temp = a[j][j];

               a[j][j] = a[j][n - 1 - j];

               a[j][n - 1 - j] = temp;

           }

Example:

Output:

Enter number of rows 3

Enter number of columns 3

Enter all the values of matrix  

1

2

3

4

5

6

7

8

9

Original Matrix:

1   2   3  

4   5   6  

7   8   9  

After interchanging diagonals of matrix  

3   2   1  

4   5   6  

9   8   7 

Example 2:

Output:

Enter number of rows 2

Enter number of columns 1

Enter all the values of matrix  

1

2

Rows not equal to columns