=======================================
Student.java
=======================================
import java.util.Scanner;
    public class Student
    {
        Scanner scanner = new Scanner (System.in);
        
        String student1, student2 = "";  
        int s1Score1, s1Score2, s2Score1, s2Score2 = 0;
        double average1, average2 = 0;
        //Student Name
        public Student (String s1, String s2)
        {
            student1 = s1;
            student2 = s2; 
        }
        //return student1's name back to Grades
        public String getStudentName1()
        {
            return student1;
        }
        //return student2's name back to Grades
        public String getStudentName2()
        {
            return student2;
        }
        //get all the marks from Grades, then caculate in here.
        public int inputGrades(int s1s1, int s1s2, int s2s1, int s2s2)
        {
            s1Score1 = s1s1;
            s1Score2 = s1s2;
            s2Score1 = s2s1;
            s2Score2 = s2s2;
            
            average1 = (double)((s1Score1 + s1Score2)/2);
            average2 = (double)((s2Score1 + s2Score2)/2);
            return 0;
        }
        //return average1 and average2.
        public double getAverage1(){
            return average1;
        }
        public double getAverage2(){
            return average2;
        }
}
=======================================
Grades.java
=======================================
import java.util.Scanner;  
    public class Grades
    {
        public static void main(String[] args)
        {       
            String student1 = "Mary";
            String student2 = "Mike";
            Student X1 = new Student (student1, student2);
            
            Scanner scanner = new Scanner (System.in);
            
            //Studnet1's marks.
            //s1Score1 = Student1's first test score.
            //s1Score2 = Student1's second test score.
            System.out.print("Please enter Test1 score for " + student1 );
            System.out.println(" :");
            int s1Score1 = scanner.nextInt();
            
            System.out.print("Please enter Test2 score for " + student1 );
            System.out.println(" :");
            int s1Score2 = scanner.nextInt();
            
            //Student2's marks. 
            //s2Score1 = Student2's first test score.
            //s2Score2 = Student2's second test score.
            System.out.print("Please enter Test1 score for " + student2 );
            System.out.println(" :");
            int s2Score1 = scanner.nextInt();
            
            System.out.print("Please enter Test2 score for " + student2 );
            System.out.println(" :");
            int s2Score2 = scanner.nextInt();
            
            //send the marks to Studnet, then Student will caculate for it.
            X1.inputGrades(s1Score1, s1Score2, s2Score1, s2Score2);
            
            //print out the final reslut, finished.
            System.out.println("The average for "+ X1.getStudentName1() + " is " + X1.getAverage1());
            System.out.println();
            System.out.println("The average for "+ X1.getStudentName2() + " is " + X1.getAverage2() );
            System.out.println("Done");
    }
}
=======================================
Ticket.java
=======================================
import java.util.Scanner;
public class Ticket
{
String firstName, lastName = "";
String depCity, depCountry, depPoint = "";
String arvCity, arvCountry, arvPoint = "";
String fullForm, compactForm = "";

public Ticket (String fn, String ln)
        {
            firstName = fn;
            lastName = ln; 
        }
        
        public String getFirstName()
        {
            return firstName;
        }
        
        public String getLastName()
        {
            return lastName;
        }
        
        public String setDeparturePoint (String dCity, String dCountry)
        {
            depCity = dCity;
            depCountry = dCountry;
            depPoint = (String)(dCity + " (" + dCountry + ")");
            return null;
        }
        
        public String setArrivalPoint(String aCity, String aCountry)
        {
            arvCity = aCity;
            arvCountry = aCountry;
            arvPoint = (String)(aCity + " (" + aCountry + ")");
            return null;
        }
        
        public String printFullForm()
        {
            fullForm = (String)(firstName + " " + lastName + 
            ": " + depPoint + "-" +arvPoint);
            return fullForm;
        }
        
        public String printCompactForm()
        {
            compactForm = (String)(firstName.substring(0,1).toUpperCase() + "." +
            lastName + ": " + depCity + " (" + depCountry.substring(0,2).toUpperCase() + 
            ") - " + arvCity + " (" + arvCountry.substring(0,2).toUpperCase() + ")");
            
            return compactForm;
        }
    }

=================================================
TicketTest.java
=================================================
import java.util.Scanner;  
    public class TicketTest
    {
         
        public static void main(String[] args)
        {       
            Scanner in = new Scanner(System.in);
            System.out.println("Please enter the First Name: ");
            String firstName = in.nextLine();
            System.out.println("Please enter the Last Name: ");
            String lasttName = in.nextLine();
            
            Ticket N1 = new Ticket (firstName, lasttName);
            
            System.out.println("Please enter the names of departure city: ");
            String depCity = in.nextLine();
            System.out.println("Please enter the names of departure country: ");
            String depCountry = in.nextLine();
            System.out.println("Please enter the names of arrival city: ");
            String arvCity = in.nextLine();
            System.out.println("Please enter the names of arrival country: ");
            String arvCountry = in.nextLine();
            
            N1.setDeparturePoint(depCity, depCountry);
            N1.setArrivalPoint(arvCity, arvCountry);
            
            System.out.println ("Full Form ...");
            System.out.println (N1.printFullForm());
            System.out.println ("Comapct Form ...");
            System.out.println (N1.printCompactForm());
            
            System.out.println ("DONE");
    }
}