/*	Punters Lounge JAVA programming course
 *	
 *	Lesson63.java
 *
 *	Author	:	Erik Datapunter
 *	Date	:	28/apr/2004
 *
 *	Text manipulation example program
 *
 */

public class Lesson63 {
public static void main(String[ ] arguments) {

	// string buffers to hold the existing text
	StringBuffer mytext = new StringBuffer(100);

	// one string array to hold the word to look for
	String[] searchletters = new String[5];
	searchletters[0] = "a";
	searchletters[1] = "e";
	searchletters[2] = "i";
	searchletters[3] = "o";
	searchletters[4] = "u";

	// one int array to hold the number of times each letter is found
	int[] nrletters = new int[5];

	// an integer to use in a for loop to loop for each letter
	int lettercounter = 0;

	// search position variables
	int startsearch = 0;
	int foundposition = 0;

	// use the append method to put the text into the buffer
	mytext = mytext.append(arguments[0]);


	// for the amount of letters to count do a while loop for each letter
	for ( lettercounter = 0 ; lettercounter < 5 ; lettercounter = lettercounter + 1)
	{

		// reset search counters
		startsearch = 0;
		foundposition = 0;

		/* using a while loop
		 *
		 *	we search for the letter using the indexOf method,
		 *	with each search we move the starting position based on the
		 *	position of the previously found letter
		 *
		 *	if no (more) letter found then foundposition becomes -1
		 *
		 *	so as long as foundposition is not -1 we have found a letter
		 *
		 */
		while ((foundposition = mytext.indexOf(searchletters[lettercounter],startsearch)) != -1)
		{
			// another letter found
			nrletters[lettercounter] = nrletters[lettercounter] + 1;
			// move the start position of the search to the letter after the found letter
			startsearch = foundposition + 1;
		}
	}
	
	for ( lettercounter = 0 ; lettercounter < 5 ; lettercounter = lettercounter + 1)
	{
		System.out.println("Found "+searchletters[lettercounter]+" : "+nrletters[lettercounter]+" times.");
	}
	
}
}