Switch statement - str and ch comparisons

Question

Hi everyone,
As usual lectures are a fat load of good when it comes to explaining anything, can't seem to get this working no matter how much I look over it.
Basically i'm having trouble looking at a string, determining what is at character three in the string, and then responding by saying what it is (for this I used an if statement in the switch, i'm kinda noob so I can't think of any other way and don't particularly want to change it if it can be helped).
The only problem i'm getting is it says "char cannot be dereferrenced" and points to this piece of code -- third.equals("a") || third.equals("e") ...and so on.
I have included the code for you to see...
thx in advance :)
/*Program offering users
*a switch statement choice
import java.util.*;
public class Switch
     public static void main (String[] args)
     Scanner kybd = new Scanner(System.in);
     System.out.println("Please enter a string");
     String input = kybd.nextLine();
     System.out.println("---Choose an option---");
     System.out.println("\n" + "1. Work out how many characters the word is");
     System.out.println("2. Display the first character");
     System.out.println("3. Display the last character");
     System.out.println("4. If longer than 3 chracters, is the 3rd a vowel or digit?");
     int choice = kybd.nextInt();
     int length = input.length();
     char third = input.charAt(2);
          switch(choice)
          case 1:
          System.out.println("The length of the phrase is: " + length);
          break;
          case 2:
          char firstLetter = input.charAt(0);
          System.out.println("The first letter is: " + firstLetter);
          break;
          case 3:
          char lastLetter = input.charAt(length-1);
          System.out.println("The last letter is: " + lastLetter);
          break;
          case 4:
          if (third.equals("a"))
          System.out.println("Third character is a vowel: " + third);
          else
               if (third.equals("0"))
               System.out.println("Third character is a digit: " + third);
               else
               System.out.println("That is neither a vowel or digit");
          break;
          default:
          System.out.println("That is not an acceptable choice");
}

Answer 1

Cheers mate, knew it had to be something obvious.
You would think they would teach us a bit more about ch comparisons before asking us to do it...there's no reference anywhere in lectures to that simple thing.
Thx for your help.