How would i do this code with a while loop to remove the letters? and you

There is of course a replace() function in java that lets you do this without a while loop. If you want to do it letter by letter, it gets a little complicated because you have to take care not to index the string outside its bounds.

I did not bother to create a separate runner class. The Main is just inside this class and everything is static.

public class LetterRemover {

   public static String RemoveLetters(String s, char c)

   {

       int loc = s.indexOf(c);

       while(loc >= 0)

       {            

           if (loc == 0) {

               s = s.substring(1);

           } else if (loc == s.length()-1) {

               s = s.substring(0, loc);

           } else {

               s = s.substring(0, loc) + s.substring(loc+1);

           }

           loc = s.indexOf(c);

       }

       return s;

   }

   public static void Test(String s, char c) {

       System.out.format("%s - letter to remove %c\n%s\n", s, c, RemoveLetters(s,c));

   }

   public static void main(String[] args) {

       Test("I am Sam I am", 'a');

       Test("xeesss", 's');

       Test("qwertyqwertyqwerty", 'a');

   }

}