Question

**Using NetBeans**

Lesson

Using inheritance to reuse classes.

Deliverables

• person.java
• student.java
• studentAthlete.java
• app.java

Using inheritance and the classes (below)

• The person class has
  • first name
  • last name
  • age
  • hometown
  • a method called getInfo() that returns all attributes from person as a String
• The student class is a person with
  • an id and
  • a major and
  • a GPA
  • student has to call super passing the parameters for the super class constructor
  • a method called getInfo() that returns all attributes from student as a String
    • this methods has to override the method getInfo() in person
• The student-athlete class is a student with
  • a sports (football, or track, or soccer, volleyball, etc.)and
  • a ranking (a random number between 0 and 100)
  • student-athlete has to call super passing the parameters for the super class constructor
  • a method called getInfo() that returns all attributes from student-athlete as a String
  • this methods has to override the method getInfo() in student

Create an application (app) that:

• Creates one student-athlete object.
• Displays all information about the student-athlete object
• Does it in the most efficient way possible (avoids unnecessary duplication of attributes and methods)
• Uses the classes
  • app
  • person
  • student inheriting from person
  • student-athlete inheriting from student

person First name Last name аpp Age Hometown Creates 1 student-athlete object getlnfo() 1-Displays the complete information about the student-athlete object student Id New attributes in addition to Major person's attributes GPA Overrides the getinfo() method from the superclass person New attributes Student-athlete in addition to sports ranking student attributes Overrides the getlnfo() method from the superclass student

Answer 1

class person
{
   private String firstName,lastName,hometown;
   private int age;
  
   public person(String firstName,String lastName,int age,String hometown)
   {
       this.firstName = firstName;
       this.lastName = lastName;
       this.age = age;
       this.hometown = hometown;
   }
   public String getInfo()
   {
       return "Name : "+firstName+" "+lastName+" Age : "+age +" Hometown : "+hometown;
   }
}

class student extends person
{
   private int id;
   private String major;
   private double gpa;
  
   public student(String firstName,String lastName,int age,String hometown,int id,String major,double gpa)
   {
       super(firstName,lastName,age,hometown);// call to base class person constructor
       this.id = id;
       this.major = major;
       this.gpa = gpa;
   }
   public String getInfo()
   {
       return super.getInfo() +" ID : "+id +" Major : "+major +" GPA : "+gpa;
   }
}

class studentAthlete extends student
{
   private String sports;
   private int ranking;
  
   public studentAthlete(String firstName,String lastName,int age,String hometown,int id,String major,double gpa,String sports,int ranking)
   {
       super(firstName,lastName,age,hometown,id,major,gpa);// call to base class student constructor
       this.sports = sports;
       this.ranking = ranking;
   }
   public String getInfo()
   {
       return super.getInfo() +" Sports : "+sports +" Ranking : "+ranking;
   }
}

class app
{
   public static void main (String[] args)
   {
       studentAthlete sa = new studentAthlete("Jim","Haward",21,"New Jersey",1006,"Finance Accounting",3.75,"football",25);
      
       System.out.println(sa.getInfo());
   }
}

Output:

Name : Jim Haward Age : 21 Hometown : New Jersey ID : 1006 Major : Finance Accounting GPA : 3.75 Sports : football  Ranking : 25

Do ask if any doubt. Please upvote.