Write a Java program that prompts the user to enter two 3-by-3 arrays of integer

Question

Write a Java program that prompts the user to enter two 3-by-3 arrays of integers and displays whether the two are identical.

The two-dimensional arrays m1 and m2 are identical if they have the same contents. Write a method that returns true if m1 and m2 are identical, using the following header:

public static boolean equals(int[ ][ ] m1, int[ ][ ] m2)

Sample runs:

Enter list1: 51 25 22 6 1 4 24 54 6 <- this line is user prompt input
Enter list2: 51 22 25 6 1 4 24 54 6 <- this line is user prompt input
The two arrays are identical

Enter list1: 51 5 22 6 1 4 24 54 6 <- this line is user prompt input
Enter list2: 51 22 25 6 1 4 24 54 6 <- this line is user prompt input
The two arrays are not identical

Explanation / Answer

import java.util.*;

class MatrixEqual{

public static boolean equals(int[][] m1, int[][] m2){
   for(int i=0; i<3; i++){
       for(int j=0; j<3; j++){
           if(m1[i][j] != m2[i][j]){
               return false;
               }
           }
       }
       return true;
   }
  
public static void main(String [] args){
   int[][] mat1 = new int[3][3];
       int[][] mat2 = new int[3][3];

       Scanner in = new Scanner(System.in);
       System.out.print("Enter list1:");
       for(int i=0; i<3; i++){
       for(int j=0; j<3; j++){
           mat1[i][j] = in.nextInt();
           }
       }
      
       System.out.print("Enter list2:");
       for(int i=0; i<3; i++){
       for(int j=0; j<3; j++){
           mat2[i][j] = in.nextInt();
           }
       }
      
       if(equals(mat1, mat2)){
       System.out.println("The two arrays are identical");
       }else{
       System.out.println("The two arrays are not identical");
       }
   }
}

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