Java: Calling a parent's method with child's member variable

Let's say I have an abstract parent class that has member variables which are used in a method.

public abstract class Person{
    public String jobTitle;
    public void printJob(){
        System.out.println(jobTitle);
    }
}

If I now have two child classes

public class Teacher extends Person{
    public String jobTitle = "Teacher";
}
public class Janitor extends Person{
    public String jobTitle = "Janitor";
}

and I want to avoid code cloning, i.e. implementing the same printJob()-method in both classes, I now have a problem, since the printJob()-method is unable to access member variables of the child classes.

Is there any way that i can call a parent classes' method but have the method use the child classes' member variables?

You can use abstract methods like this

public abstract class Person {
   public void printJob() {
      System.out.println(getJobTitle());
   }

   protected abstract String getJobTitle();

   public static void main(String[] args) {
      Person teacher = new Teacher();
      Person janitor = new Janitor();

      System.out.println(teacher.getJobTitle());
      System.out.println(janitor.getJobTitle());
   }
}

class Teacher extends Person {
   @Override
   protected String getJobTitle() {
      return "Teacher";
   }
}

class Janitor extends Person {
   @Override
   protected String getJobTitle() {
      return "Janitor";
   }
}

Updated after op's comment for code cloning...

public class Person {
   public static void main(String[] args) {
      System.out.println(new Teacher().job);
      System.out.println(new Janitor().job);
   }

   private static class Teacher extends Person {
      private String job = "Teacher";
   }

   private static class Janitor extends Person {
      private String job = "Janitor";
   }
}