Hi, i have a simple question

Question

Hi all. New to the forums, and Java.
My question is probably very simple to all of you, but call me dumb, I just can't figure it out. I'm trying to figure out how to "check" an input so it is not 0. If it is, I want the program to use the while loop to prompt for a re-enter, and when it gets an input other than 0, the program continues. Here is the code:
import java.util.Scanner;
public class Assig1Ex1Ver2
   public static void main(String[] args)
      Scanner input = new Scanner(System.in);
      System.out.println("Type in the first number and hit \"enter\": ");
      double input1 = -1;
      double input2 = -1;
      if (input.hasNextDouble())
           input1 = input.nextDouble();
      else
           System.out.println("Entry of first number failed");
           System.out.println("The first number will be set to -1");
           input.nextLine(); // we must read what the user typed and then ignore it
      System.out.println("Type in the second number and hit \"enter\": ");
      if (input.hasNextDouble())
             if (input2 == 0);
                  while (input2 == 0);
                       System.out.println("Do not input 0. Please re-enter");
             else
                  input2 = input.nextDouble();
      else
           System.out.println("Entry of second number failed");
            System.out.println("The second number will be set to -1");
            input.nextLine(); // we must read what the user typed and then ignore it
      double answer = input1 / input2;
      System.out.println("The quotient is: " + answer);
}The "else" above "input2 = input.nextDouble()" for some reason is seen as an error (I guess that's my second question), but I if I omit that "else" I get this answer:
Type in the first number and hit "enter":
34
Type in the second number and hit "enter":
6
Do not input 0. Please re-enter
The quotient is: 5.666666666666667It's seeing the second input as always being 0. Anyone have an idea for this?

Answer 1

Ok, I rewrote it and got rid of the while statement.
import java.util.Scanner;
public class Assig1Ex1Ver2
     public static void main(String[] args)
          Scanner input = new Scanner(System.in);
          System.out.println("Type in the first number and hit \"enter\": ");
          double input1 = -1;
          double input2 = -1;
          if (input.hasNextDouble())
               input1 = input.nextDouble();
          else
               System.out.println("Entry of first number failed");
               System.out.println("The first number will be set to -1");
               input.nextLine(); // we must read what the user typed and then ignore it
          System.out.println("Type in the second number and hit \"enter\" (Do not enter 0): ");
          if (input.hasNextDouble())
               if (input.nextDouble()==0)
                    System.out.println("Cannot divide by 0.");
               else
                    input2 = input.nextDouble();
          else
               System.out.println("Entry of second number failed");
               System.out.println("The second number will be set to -1");
               input.nextLine(); // we must read what the user typed and then ignore it
          double answer = input1 / input2;
          System.out.println("The quotient is: " + answer);
}Now what happens is that after I push enter after inputting the second number, nothing happens. What's wrong now? Please help.