Is an array mirror like

Question

I'm trying to compare first and second half of an array. For example: [3, 7, 7, 3] , 3, 7 is the first half and 7, 3 is the second half. I tried with nested loops but it haven't worked so far. Here is my code and the question is what is wrong with it?

int [] arr = {3, 7, 7, 3};
boolean isMirror = false;

for (int i = arr.length/2 -1; i>=0; i--) {
    for (int j = arr.length/2; j < arr.length; j++) {
        if (arr[i] == arr[j]) {
            isMirror = true;
            break;
        } else {
            isMirror = false;
            break;
        }
    }
}
if (isMirror) {
    System.out.println("The array is mirror-like");
} else {
    System.out.println("The array is not mirror-like");
}

Answer 1

Issue is you are comparing 7 with 7 and 3 using nested loop hence, isMirror will be false so remove nested loop and use two variable with single loop

boolean isMirror=true;
for(int i=0, j = arr.length-1; i<arr.length/2;i++,j--){
    if(arr[i]!=arr[j]){
        isMirror=false;
        break;// not equal so go out
    }
}

Answer 2

If you want to find a mirror, just one loop needed:

set boolean mirror = true;
walk from i=0 (first element) to the mid of the array length (say n/2).

  if array[i] != array[maxlength - i] 
     set mirror = false, and the you may end

Answer 3

You just need one loop and set isMirror = false when arr[i] and arr[j] don't equal:

int[] arr = {3, 7, 7, 3};
boolean isMirror = true;

for (int i = 0; i <= arr.length/2; i++) {
    int j = arr.length - 1 - i;
    if (arr[i] != arr[j]) {
        isMirror = false;
        break;
    }
}
if (isMirror) {
    System.out.println("The array is mirror-like");
} else {
    System.out.println("The array is not mirror-like");
}