java 判断两个4*4阶矩阵是否相等

import java.util.Scanner;

class Main {

   public static void main(String[] args) {

      Scanner input = new Scanner(System.in);
      // code here
      int [][] a=new int[4][4];
        int [][] b=new int [4][4];
        for (int i = 0; i <=3; i++) {
            for (int j = 0; j <=3; j++) {
                a[i][j]=input.nextInt();
            }
        }
        for (int i = 0; i <=3; i++) {
            for (int j = 0; j <=3; j++) {
                b[i][j]=input.nextInt();
            }
        }
        for (int i = 0; i <=3; i++) {
            for (int j = 0; j <=3 ; j++) {
                if(a[i][j]!=b[i][j]){
                    System.out.println("NO");
                    break;
                }
                else{
                    if(i==3 && j==3){
                        System.out.println("YES");
                    }
                }
            }
        }

      input.close();
   }
}