import java.util.*;

public class Ex17VowelCount {

	// don't need
	public static boolean isVowel(char ch) {
		ch = Character.toLowerCase(ch);
		return ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u';
	}

	public static int getVowelIndex(char ch) {
		ch = Character.toLowerCase(ch);
		if (ch == 'a') return 0;
		if (ch == 'e') return 1;
		if (ch == 'i') return 2;
		if (ch == 'o') return 3;
		if (ch == 'u') return 4;
		return -1;
	}
	
	public static int[] vowelCount1(String s) {
		int[] list = new int[5];
		for (int i = 0; i < s.length(); i++) {
			char ch = s.charAt(i);
			int index = getVowelIndex(ch);
			if (index != -1) {
				list[index]++;
			}
		}
		return list;
	}

	// don't need
	public static boolean isVowel(String ch) {
		ch = ch.toLowerCase();
		return ch.equals("a") || ch.equals("e") || 
			   ch.equals("i") || ch.equals("o") || ch.equals("u");
	}
	
	public static int getVowelIndex(String ch) {
		ch = ch.toLowerCase();
		if (ch.equals("a")) return 0;
		if (ch.equals("e")) return 1;
		if (ch.equals("i")) return 2;
		if (ch.equals("o")) return 3;
		if (ch.equals("u")) return 4;
		return -1;
	}
	
	public static int[] vowelCount2(String s) {
		int[] list = new int[5];
		for (int i = 0; i < s.length(); i++) {
			String ch = s.substring(i,i+1);
			int index = getVowelIndex(ch);
			if (index != -1) {
				list[index]++;
			}
		}
		return list;
	}
	
	public static void main(String[] args) {
		String str = "I think, therefore I am.";
		System.out.println( Arrays.toString( vowelCount1(str) ) );
		System.out.println( Arrays.toString( vowelCount2(str) ) );
	}

}