public static void main (String [] args) {

		String word = "caramel";
		boolean [] array = new boolean[35];

		for (int i = 0; i < word.length(); i++) {

			char ch = word.charAt(i);

			int k = Character.getNumericValue(ch);

			if (array[k] == true) {
				System.out.println("There is a duplicate.");
				System.exit(0);
			}

			array[k] = true;
		}
		System.out.println("There are all unique characters.");
	}