Java Varargs - Simple Addition

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    class Add {
        public void add(int... n) {
            int sum = 0;
            List<String> arr = new ArrayList<>();
            for (int num : n) {
                sum += num;
                arr.add(Integer.toString(num));
            }
            
            System.out.println(String.join("+", arr) + "=" + sum);
        }
    }