public static String caesarCipher(String x){
      String temp = "";
      x = x.trim(); //remove whitespace
      x = x.toLowerCase(); //In java, 'A' != 'a', so we want the letters in one case

   //This section establishes the alphabet in an ArrayList.
      ArrayList<Character> reference = new ArrayList<Character>();
      for(char i = 'a'; i <= 'a' + 25; i++) reference.add(i);

   //This section handles the encryption
      for(int i = 0; i < x.length(); i++){

     //Checks to see if the character is a letter
          if(!Character.isLetter(x.charAt(i))) temp += x.charAt(i);
          else{temp += reference.get((reference.indexOf(x.charAt(i)) + 3)&);}
          
          }
      return temp;
 }
        
        public static String decipherCaesar(String x){
      String temp = "";
      x = x.trim(); //remove whitespace
      x = x.toLowerCase(); //In java, 'A' != 'a', so we want the letters in one case

   //This section establishes the alphabet in an ArrayList.
      ArrayList<Character> reference = new ArrayList<Character>();
      for(char i = 'a'; i <= 'a' + 25; i++) reference.add(i);

   //This section handles the encryption
      for(int i = 0; i < x.length(); i++){

     //Checks to see if the character is a letter
          if(!Character.isLetter(x.charAt(i))) temp += x.charAt(i);
          else{temp += reference.get((reference.indexOf(x.charAt(i)) - 3)&);}
          
          }
      return temp;
 }