Help needed in java ! Thanx :)

Problem Description (from Big Java: Late Objects, Chapter 2; Programming Project P2.12) The circuit shown below illustrates some important aspects of the connection between a power company and one of its customers. The customer is represented by three parameters, V, P, and pf. V is the voltage accessed by plugging into a wall outlet. Customers depend on having a dependable value of V in order for their appliances to work properly. Accordingly, the power company regulates the value of V carefully. P describes the amount of power used by the customer and is the primary factor in determining the customer's electric bill. The power factor, pf, is less familiar. (The power factor is calculated as the cosine of an angle so that its value will always be between zero and one.) In this problem you will be asked to write a Java program to investigate the significance of the power factor. R=10 P=260 W V, 120 Vrms pf=06 R=10 Power Company Customer Power Lines