/**
 *  Name: Erica Eddy
 *  Course: CSCI 145/241 - Computer Science I
 *  Section: 00_
 *  Assignment Number: ??
 *
 *  Project/Class Description
 *  This contains an examples illustrating how to fix
 *  looping problems with StringBuilders.
 *  --  Eliminating selected vowels from a StringBuilder.
 *
 *  Known Bugs: you get to fix this one!
 */
import java.io.*;

public class StringBuilderLoopDelete
{
    public static void main (String [] args) throws IOException
    {       
        // This code is supposed to pull all occurrences of
        // 'a', 'e' and 'o' out of the StringBuilder
        // It doesn't work; positions of characters change
        // during the loop due to deleteCharAt().

        StringBuilder sb = new StringBuilder("season");
        for (int j = 0; j < sb.length(); j++)
        {
            char ch = sb.charAt(j);
            System.out.println("ch = " + ch);
            if (ch == 'a' || ch == 'e' || ch == 'o')
                sb.deleteCharAt(j);
        }
        System.out.println(sb.toString());
    }
}

        // How to fix:  use a while loop, adjusting j's value
        // only when a character is NOT deleted