and welcome to the JavaRanch. Let me see if I can give you a few pointers, so you can continue your school project/assignment.
Before I can help you, I need you to clarify the following: 1) Why did you locate the method calls where you did? in the class P4_4
Please explain the "public interface" of the Die class (i.e. it's public methods). Btw. according to the "Java naming convention" we name references or variables with a lowercase character as the first character (e.g. Person svend = new Person())
What's die1 and die2?
Please take an extra look at the lefthand side of this assignment.