Question

Can anyone tell me whats wrong in this method and why it gives a nullpointerException ?

public boolean check(){

    Scanner scan = new Scanner(System.in);

    int[] arr1 = new int []{1,2,3};
    int[] arr2 = new int[]{};

    for(int i = 0;i<arr1.length;i++)
    {
        System.out.println("Enter numbers to check");
        arr2[i] = scan.nextInt();
    }

    if(arr1 == arr2)
        return true;

    return false;
}

Answer 1

Scanner scan = new Scanner(System.in);
int[] arr1 = new int[]{1,2,3};
int[] arr2 = new int[arr1.length];
for (int i = 0 ; i < arr1.length ; i++) {
  System.out.println("Enter numbers to check");
  arr2[i] = scan.nextInt();
  if (arr1[i] != arr2[i])
    return false;
}
return true;