Need help passing values through classes

This is a pretty basic concept, but I'm struggling with it. I've got three classes that I'm using for an assignment, basically, I'm passing over a string of a number into a class that parses the number and stores each individual piece of the number in different nodes as a linked list. My problem lies in sending over the number in the first place. I don't want to make my method static, so i have a bit of a problem.

In the class that parses the string you can pass the string through a constructor, or a method. I'll show you how to do it with a constructor.

Code java:

---

//this is the class that does the parsing
public class parsingClass { 
   String stringToParse;
 
   public  parsingClass(String stringToParse){
      this.stringToParse = stringToParse; //Sets the string in this class to the one passed as an argument
   }
 
   //TODO: method that parses the string
}

---

and

Code java:

---

//this will be the main class, or the one that passes the string to be parsed.
public class assignmentMain {
   public static void main(String[] args){
      parsingClass parsingClass = new parsingClass(String of numbers here);
      //Rest of code
   }
}

---

This should be a gentle nudge in the right way.

Thanks, I appreciate the response. I ultimately got past it last night, and it was a weird mistake to make. It's just been a while since I programmed, school just started back up.