Intersection of Multiple Arrays LeetCode solution in Java

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class Solution {
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  public List<Integer> intersection(int[][] nums) {
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    List<Integer> ans = new ArrayList<>();
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    int[] count = new int[1001];
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    for (int[] arr : nums) {
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      for (int i : arr) {
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        count[i]++;
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      }
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    }
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    for (int i = 0; i < count.length; i++) {
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      if (count[i] == nums.length) {
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        ans.add(i);
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      }
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    }
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    return ans;
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  }
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}