Need help with hw

/*
 * Main.java
 *
 * Created on September 13, 2007, 10:58 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package johnsmith_ucf_reg;

import java.util.Scanner;

/**
 *
 * @author Smi
 */
public class Main {
    
    /** Creates a new instance of Main */
    public Main() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
   
        String fname = " ";
        String lname = " ";
        String fullname = " ";
        int Student_Number = 0;
        double Registration_Semester = 0;
        double Class_1 = 0 ;
        double Class_2 = 0;
        double Class_3 = 0;
        double Class_4 = 0;
        
        
        Scanner scan = new Scanner(System.in);
        
        System.out.print("Enter first name: ");
        fname = scan.nextLine();
        System.out.print("Enter last name: ");
        lname = scan.nextLine();
        System.out.print("Enter Student Number: ");
        Student_Number = scan.nextInt();
        System.out.print("Enter Registration Semester: ");
        Registration_Semester =scan.nextDouble();
        System.out.print("Enter Class 1: ");
        Class_1 = scan.nextDouble();
        System.out.print("Enter Class 2: ");
        Class_2 = scan.nextDouble();
        System.out.print("Enter Class 3: ");
        Class_3 = scan.nextDouble();
        System.out.print("Enter Class 4: ");
        
        
        System.out.println("End of Statement");
    }