Java program to check whether a matrix is symmetric or not

Program to check matrix is symmetric or not in java

// This program will find weather 
// the matrix is symmetric or not.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ExArrayFindSymmetric {
  public static void main(String args[]) throws IOException {
    // create buffer class object.
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

    // enter how many elements you have to enter.
    System.out.print("Enter the number of elements : ");
    int m = Integer.parseInt(br.readLine());
    int A[][] = new int[m][m];

    // Check for rows and column.
    if (m > 2 && m < 10) {
      // enter the elements here.
      System.out.println("\nInput the elements of the Matrix : \n");
      for (int i = 0; i < m; i++) {
        for (int j = 0; j < m; j++) {
          System.out.print("Enter the elements : ");
          A[i][j] = Integer.parseInt(br.readLine());
        }
      }

      // here the original matrix.
      System.out.println("\nThe Original Matrix is : ");
      for (int i = 0; i < m; i++) {
        for (int j = 0; j < m; j++) {
          System.out.print(A[i][j] + "\t");
        }
        System.out.println();
      }

      // check weather matrix is symmetric or not.
      int flag = 0;
      for (int i = 0; i < m; i++) {
        for (int j = 0; j < m; j++) {
          if (A[i][j] != A[j][i]) {
            // When elements do not matched.
            flag = 1;
            break;
          }
        }
      }
      // check for symmetric or not.
      if (flag == 1)
        System.out.println("\nThe given Matrix is Not Symmetric");
      else
        System.out.println("\nThe given Matrix is Symmetric");

      // calculate sum of diagonals.
      int ld = 0, rd = 0;
      for (int i = 0; i < m; i++) {
        for (int j = 0; j < m; j++) {
          // for the left diagonal
          if (i == j) {
            ld = ld + A[i][j];
          }
          // for the right diagonal
          if ((i + j) == (m - 1)) {
            rd = rd + A[i][j];
          }
        }
      }

      // print sum of left and right diagonals.
      System.out.println("The sum of the left diagonal = " + ld);
      System.out.println("The sum of the right diagonal = " + rd);
    } else
      System.out.println("The Matrix Size is Out Of Range....");
  }
}

Output

First run:
Enter the number of elements : 3

Input the elements of the Matrix :
Enter the elements : 11
Enter the elements : 12
Enter the elements : 12
Enter the elements : 55
Enter the elements : 65
Enter the elements : 66
Enter the elements : 45
Enter the elements : 25
Enter the elements : 35

The Original Matrix is : 
11	12	12	
55	65	66	
45	25	35	

The given Matrix is Not Symmetric
The sum of the left diagonal = 111
The sum of the right diagonal = 122

Second run:
Enter the number of elements : 3

Input the elements of the Matrix :
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11
Enter the elements : 11

The Original Matrix is : 
11	11	11	
11	11	11	
11	11	11	

The given Matrix is Symmetric
The sum of the left diagonal = 33
The sum of the right diagonal = 33

Third run:
Enter the number of elements : 2
The Matrix Size is Out Of Range....