Displays every permutation of the given letters. Probably a horrible way of doing it.

FormWords.java

import java.util.*;
class FormWords {

        private String joinLetters(ArrayList<String> letters) {
                String word = "";
                for (String letter : letters) {
                        word += letter;
                }

                return word;    
        }
        /**
          * Move the first letter to the end of the queue
        **/
        private ArrayList<String> jumbleLetters(ArrayList<String> letters, int fromPos, int toPos) {
                String letter = letters.remove(fromPos);
                letters.add(toPos, letter);
                return letters;
        }

        public static void main(String[] argv) {
                FormWords joined = new FormWords();
                ArrayList<String> letters = new ArrayList<String>();

                //Could split a string from argv to create list
                letters.add("c");       
                letters.add("a");       
                letters.add("r");       
                letters.add("b");       
                letters.add("o");       
                letters.add("n");       


                for (int j=0;j<letters.size();j++) {
                        for (int i=0;i<letters.size();i++) {
                                String joinedWord = joined.joinLetters(letters);
                                if (i != j) {
                                        System.out.println(joinedWord);
                                        letters = joined.jumbleLetters(letters, i, j);  
                                }
                        }
                }
        }
}