Java Program to determine whether two matrices are equal

In this program, we need to check whether given matrices are equal or not.

Two matrices are said to be equal if and only if they satisfy the following conditions:

Both the matrices should have the same number of rows and columns.
Both the matrices should have the same corresponding elements.

Java Program to determine whether two matrices are equal

Consider the above example, where matrices A and B are equal as they have the same size and same corresponding elements.

Algorithm

STEP 1: START
STEP 2: DEFINE row1, col1, row2, col2
STEP 3: INITIALIZE first matrix a[][] ={{1, 2, 3}, {8, 4,6}, {4, 5,7}}
STEP 4: INITIALIZE second matrix b[][] ={{1 2, 3}, {8, 4, 6}{4, 5, 7}}
STEP 5: row1 = a.length
STEP 6: col1 = a[0].length
STEP 7: row2 =b.length
STEP 8: col2 = b[0].length
STEP 9: if(row1!=row2 || col1!=col2)
then
PRINT "No"
else
go to step 10;
STEP 10: REPEAT STEP 11 UNTIL i<row1
//for(i=0; i<row1; i++)
STEP 11: REPEAT STEP12 UNTIL j<col1
//for(j=0; j<col1; j++)
STEP 12: if(a[i][j]=b[i][j]) then
flag =false
break
STEP 13: if(flag)
then PRINT "Yes"
else
PRINT "No"
STEP 14: END

program

public class EqualMatrix  
{  
    public static void main(String[] args) {  
        int row1, col1, row2, col2;  
        boolean flag = true;  
          
        //Initialize matrix a  
        int a[][] = {     
                        {1, 2, 3},  
                        {8, 4, 6},  
                        {4, 5, 7}  
                    };  
            
          //Initialize matrix b  
        int b[][] = {     
                        {1, 2, 3},  
                        {8, 4, 6},  
                        {4, 5, 7}  
            };  
            
        //Calculates the number of rows and columns present in the first matrix  
  
          row1 = a.length;  
        col1 = a[0].length;  
          
        //Calculates the number of rows and columns present in the second matrix  
  
          row2 = b.length;  
        col2 = b[0].length;  
          
        //Checks if dimensions of both the matrices are equal  
        if(row1 != row2 || col1 != col2){  
            System.out.println("Matrices are not equal");  
        }  
        else {  
            for(int i = 0; i < row1; i++){  
                for(int j = 0; j < col1; j++){  
                  if(a[i][j] != b[i][j]){  
                      flag = false;  
                      break;  
                  }  
                }  
            }  
              
            if(flag)  
                System.out.println("Matrices are equal");  
            else  
                System.out.println("Matrices are not equal");  
        }  
    }  
}  

Output: