Make Two Arrays Equal by Reversing Sub-arrays LeetCode solution in Java

1
class Solution {
2
  public boolean canBeEqual(int[] target, int[] arr) {
3
    HashMap<Integer, Integer> hm1 = new HashMap();
4
    for (int i : arr) {
5
      if (hm1.containsKey(i)) hm1.put(i, hm1.get(i) + 1);
6
      else hm1.put(i, 1);
7
    }
8
    for (int i : target) {
9
      if (hm1.containsKey(i)) {
10
        hm1.put(i, hm1.getOrDefault(i, 0) - 1);
11
        if (hm1.get(i) == 0) hm1.remove(i);
12
      } else return false;
13
    }
14
    if (hm1.size() == 0) return true;
15

16
    return false;
17
  }
18
}