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class ComparableSample {
	public static void main(String[] args) {
		Set<String> stringTest = new HashSet<>();
		String[] sample = { "b", "a" };
		Collections.addAll(stringTest, sample);
		for (String s : stringTest) {
			System.out.println(s);
		}

		Set<Integer> integerTest = new HashSet<>();
		Integer[] integer = { 3, 1 };
		Collections.addAll(integerTest, integer);
		for (Integer i : integerTest) {
			System.out.println(i);
		}

	}
}