Jun 19, 2022 · Jun 12, 2022
diff --git a/java/217-Contains-Duplicate.java b/java/217-Contains-Duplicate.java
 class Solution {
    public boolean containsDuplicate(int[] nums) {
        Set<Integer> numbers = new HashSet<Integer>();
        for (int num : nums) {
            if (numbers.contains(num)) return true;
            numbers.add(num);
        Set<Integer> uniques = new HashSet<>();
        for (final int num : nums) {
            if (!uniques.add(num)) {
                return true;
            }
        }

        return false;
    }
 }
 }
Original file line number	Diff line number	Diff line change
		@@ -1,11 +1,11 @@
		class Solution {
		public boolean containsDuplicate(int[] nums) {
		Set<Integer> numbers = new HashSet<Integer>();
		for (int num : nums) {
		if (numbers.contains(num)) return true;
		numbers.add(num);
		Set<Integer> uniques = new HashSet<>();
		for (final int num : nums) {
		if (!uniques.add(num)) {
		return true;
		}
		}

		return false;
		}
		}
		}