Question

How do I start this Java: Inheritance problem?

• person.java • student.java • studentAthlete.java • app.java • Students should apply consistent indenting in all submissions. This can be done via the NetBeans Source menu. Contents person First name Last name app Creates 1 student-athlete object Hometown Retinfo) 1-Displays the complete information about the student-athlete object student New attributes Maior attributes getinfo) method from the superlas person Student-athlete student's rankine Overrides the method from the superclass student Video from Professor Fisher (7:27 minutes seconds): Link Using inheritance and the classes (below) • The person class has first name o last name age o hometown • a method called getinfo) that returns all attributes from person as a String • The student class is a person with anid and . a major and . a GPA o student has to call super passing the parameters for the super class constructor o 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 getinfol) that returns all attributes from student-athlete as a String o 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 o app o person student inheriting from person student-athlete inheriting from student

Answer 1

CODE

SOLUTION

1/App.java //import the random library file import java.util. Random; public class App 1/ main method public static void main(String[] args) // random object Random ran = new Random(); // declare the student athlete object for size 3 studentathlete stud[] = new studentathlete [3]; // constructor create dynamically stud[0] = new studentathlete ("devi", "Sharmi", 27, "RMD", "11", "opeating system", 9.5, "Basketball", ran.nextInt (100)); stud[1] = new studentathlete ("mano", "bharathi", 32, "BBR", "22", "VB.net", 4.2, "Badminton", ran.nextInt (100)); stud[2] = new studentathlete ("janani", "sri", 44, "RRL", "33", "C", 5.1, "Volleyball", ran.nextInt (100)); // Loops creation for(int x1 = 0; xl < stud.length; xl++) System.out.println(stud[x1].get_Info()); 1/Person.java //import the random library file import java.util. Random; // Creates Person class class Person // create the variables first and last name String first_Name;|| String last_Name; int age; String home_Town; // Default constructor Person() first_Name = last_Name = home_Town = ""; age = 0; // Parameterized variables Person(String fnl, String Ini, int agi, String hti) first_Name = fnl; last Name = lnl; home_Town = ht1;

age = agl; //get the first name String getfirst_Name() //return first name return first_Name; //get last name String getlast_Name() //return last name return last Name; //get homw town String gethome_Town) //return home_Town return home_Town; //get age function int getAge() //return age return age; //get student info String get_Info() //return result return "\n Name " + first_Name + " " + last_Name + "\n Home Town: " + home_Town + "\n Age: " + age; 1/Student.java // Creates a class Student inherit from Person class class Student extends Person // declare the variables ID String ID; 1/declare the variables major String major; //declare the gpa double double gpa; // Default constructor Student () // super class super(); ID = major = "";

gpa = 0; // Parameterized constructor Student (String fnl, String lni, int agi, String hti, String idi, String mal, double gpl) // super class super (fni, lni, agl, ht1); ID = idl; major = mal; gpa = gp1; //get ID function String get_ID() //return ID return ID; // Get major function String get_Major() //return major return major; double get_GPA) return gpa; // Overrides base class String get_Info() // Concatenates information return super.get_Info() + "\n ID: " + ID + "\n Major: " + major + "\n GPA: " + gpa; //studentathlete.java // Creates a class Studentathlete inherit from student class class studentathlete extends Student // declare the variables sports and rankvalue String sports1; int rankvalue; // Default constructor studentathlete() // super class super(); sports1 = "";

rankvalue = 0; // Parameterized constructor studentathlete (String fni, String ini, int agi, String hti, String idi, String mal, double gpl, String spi, int ral) // super class super (fni, Ini, agl, hti, idi, mal, gpl); sports1 = spl; rankvalue = ral; String get_Sports() return sportsl; int getrankvalue () return rankvalue; // Overrides base class String get_Info() // Concatenates get information return super.get_Info() + "\n Sports: " + sportsl + "\n rankvalue: " + rankvalue;

//OUTPUT

Name devi Sharmi Home Town: RMD Age: 27 ID: 11 Major: opeatingsystem GPA: 9.5 Sports: Basketball rankvalue: 37 Name mano bharathi Home Town: BBR Age: 32 ID: 22 Major: VB.net GPA: 4.2 Sports: Badminton rankvalue: 9 Name janani sri Home Town: RRL Age: 44 ID: 33 Major: C GPA: 5.1 Sports: Volleyball rankvalue: 23

//COPYABLE CODE

//App.java

//import the random library file

import java.util.Random;

public class App

{

// main method

public static void main(String[] args)

{

// random object

Random ran = new Random();

//declare the student athlete object for size 3

studentathlete stud[] = new studentathlete[3];

// constructor create dynamically

stud[0] = new studentathlete("devi", "Sharmi", 27, "RMD", "11", "opeatingsystem", 9.5, "Basketball", ran.nextInt(100));

stud[1] = new studentathlete("mano", "bharathi", 32, "BBR", "22", "VB.net", 4.2, "Badminton", ran.nextInt(100));

stud[2] = new studentathlete("janani", "sri", 44, "RRL", "33", "C", 5.1, "Volleyball", ran.nextInt(100));

// Loops creation

for(int x1 = 0; x1 < stud.length; x1++)

System.out.println(stud[x1].get_Info());

}

}

//Person.java

//import the random library file

import java.util.Random;

// Creates Person class

class Person

{

// create the variables first and last name

String first_Name;

String last_Name;

int age;

String home_Town;

// Default constructor

Person()

{

first_Name = last_Name = home_Town = "";

age = 0;

}

// Parameterized variables

Person(String fn1, String ln1, int ag1, String ht1)

{

first_Name = fn1;

last_Name = ln1;

home_Town = ht1;

age = ag1;

}

//get the first name

String getfirst_Name()

{

//return first name

return first_Name;

}

//get last name

String getlast_Name()

{

//return last name

return last_Name;

}

//get homw town

String gethome_Town()

{

//return home_Town

return home_Town;

}

//get age function

int getAge()

{

//return age

return age;

}

//get student info

String get_Info()

{

//return result

return "\n Name " + first_Name + " " + last_Name + "\n Home Town: " + home_Town + "\n Age: " + age;

}

}

//Student.java

// Creates a class Student inherit from Person class

class Student extends Person

{

// declare the variables ID

String ID;

//declare the variables major

String major;

//declare the gpa double

double gpa;

// Default constructor

Student()

{

// super class

super();

ID = major = "";

gpa = 0;

}

// Parameterized constructor

Student(String fn1, String ln1, int ag1, String ht1, String id1, String ma1, double gp1)

{

// super class

super(fn1, ln1, ag1, ht1);

ID = id1;

major = ma1;

gpa = gp1;

}

//get ID function

String get_ID()

{

//return ID

return ID;

}

//Get major function

String get_Major()

{

//return major

return major;

}

double get_GPA()

{

return gpa;

}

// Overrides base class

String get_Info()

{

// Concatenates information

return super.get_Info() + "\n ID: " + ID + "\n Major: " + major + "\n GPA: " + gpa;

}

}

//studentathlete.java

// Creates a class Studentathlete inherit from student class

class studentathlete extends Student

{

// declare the variables sports and rankvalue

String sports1;

int rankvalue;

// Default constructor

studentathlete()

{

// super class

super();

sports1 = "";

rankvalue = 0;

}

// Parameterized constructor

studentathlete(String fn1, String ln1, int ag1, String ht1, String id1, String ma1, double gp1, String sp1, int ra1)

{

// super class

super(fn1, ln1, ag1, ht1, id1, ma1, gp1);

sports1 = sp1;

rankvalue = ra1;

}

String get_Sports()

{

return sports1;

}

int getrankvalue()

{

return rankvalue;

}

// Overrides base class

String get_Info()

{

// Concatenates get information

return super.get_Info() + "\n Sports: " + sports1 + "\n rankvalue: " + rankvalue;

}

}