Error message

//Hi, I need some help.
//I am having a error message stating "cannot find symbol variable
stop" where the arrow is.
//Can some one help me with thie.
//Thanks ^_^
import java.util.Scanner;

public class IntegerSetTest
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner (System.in);

        System.out.println("Welcome to the Integer Set\n");

     System.out.println("This program is going to find the union or "
+
     "intersection of any two sets you enter.\nAlso it will delete "
+
     "or insert an element and check if the sets are equal." +
     "\nPlease enter the number of sets: ");
     int intArray[] = new int[100];
        int value;
     try
     {
     do
     {
     int i;

     value = input.nextInt();
     intArray[i]=value;
     System.out.println("Enter -1 to finish: ");
     int stop = input.nextInt();
     i++;
 ---> }while(stop != -1);

     for(int i=0; i<intArray.length;i++)
     {
     System.out.println(intArray[i]);
     }
     }
     catch(NumberFormatException ex)
     {

     }
    }
}