Josephus Flavius Problem Help Please

hey folks i did solve josephus problem to day , but when i made a
little change and i took some code from JosephusApp to josephus it is
all ruined and i dono why i ll post everything maybe u can help me ,
anybody please;
Josephus
//===================================================================
class Josephus
{
    Node first;
    Node last;
    Node ring;

    Josephus()
        {
            first = null;
            last = null;
            ring = null;
        }

    Node circle(int key)
    {
        Node first = new Node(key);
        Node last = first;
        first.key = key;

        for (int j = key - 1; j > 0 ; j--)
        {
            Node ring = new Node(j);
            ring.key = j;
            ring.next = first;
            first = ring;
        }
         last.next = first;
         return last;
    }

 public void suicide()
    {
     Node reference = circle(A);
        while (reference != reference.next) //when there are still
more than 1 person
        for (int i = 1; i < B; i++)//you can still execute the B
person
        reference = reference.next;
        System.out.println( "-R.I.P # "+ reference.next.key );
        reference.next = reference.next.next;
        System.out.println();
        System.out.println("Josephus has to take position ( " +
reference.key + " ) to survive!");

     }
}
//===================================================================
JosephusApp
//===================================================================
import java.io.*;
//---------------
class JosephusApp
{
     public static void main (String[] args) throws IOException
       {
        InputStreamReader inStream = new InputStreamReader(System.in);
        BufferedReader stdin = new BufferedReader(inStream);
        Josephus Josephus = new Josephus();
        String inData;
        int A;
        int B;

        System.out.println("Welcome to 'Josephus, a smart jew' problem
solver.");

System.out.println("**************************************************");
    System.out.println("How Many Jews want to commit suicide
today?");
        inData = stdin.readLine();
        A = Integer.parseInt(inData);

    if (A <=0)
        {
         System.out.println("Try a positive number!");
        }
    else
        {
         System.out.println();
            System.out.println("Eliminate one every :");
            inData = stdin.readLine();
            B = Integer.parseInt(inData);
            System.out.println();

    if (B <=0)
        {
         System.out.println("Try a positive number!");
        }

    else
        {
            Josephus.suicide();
     }
    }
  }
}

//===================================================================
THE ERROR
//===================================================================
--------------------Configuration: JDK version 1.3
<Default>--------------------
F:\Josephus.java:35: cannot resolve symbol
symbol : variable A
location: class Josephus
     Node reference = circle(A);
                                ^
F:\Josephus.java:37: cannot resolve symbol
symbol : variable B
location: class Josephus
        for (int i = 1; i < B; i++)//you can still execute the B
person
                            ^
2 errors
Process completed.
//===================================================================
Can anyone help Please guyz!!??