Part I (20%) [File: Student.java]
Create a class called Student that has the following stored
properties:
• StudentID
• First Name
• Last Name
Class Student should have read/write properties, constructor(s) and
should implement the Academic interface. For academic methods,
return zero for average, zero for credits and false for graduate.
Also implement the toString() method that returns the above
information as a String.
Part II (5%) [File: Academic.java]
Create an interface Academic that declares three methods:
1. average - that returns the average grade for students
2. credits – returns the number of credits that students
have.
3. graduate – Boolean that returns true if the student is eligible
to graduate.
Part III (25%) [File: UndergraduateStudent.java]
Create a class called UndergraduateStudent that inherits from
Student and has the following members:
• grades – array of student marks for each course
Class UndergraduateStudent should have read/write property,
constructors(s) and should override the description property. It
should also implement the Academic interface. Undergraduate student
get 0.5 credits per course and are eligible to graduate if they
have 10 credits. They can only receive a credit if their mark for a
course is 50% or higher. It should override the toString() method
as well.
Part IV (25%) [File: GraduateStudent.java]
Create a class called GraduateStudent that inherits from Student
and has the following members:
• grades - array of student marks for each course
• thesis – description of thesis (String type)
• weeklyHours – number of hours teaching per week
Class GraduateStudent should have read/write properties,
constructor(s) and should override the toString() method. It should
also implement the Academic interface. Graduate student gets 1.0
credits per course and is eligible to graduate if they have 6
credits. They can only receive a credit if their mark for a course
is 60% or higher.
Part VI (25%) [File: main.java]
Create an array that can hold Student objects. Populate this array
with 6 objects (3 of UndergraduateStudent and 3 of GraduateStudent
objects).
Sort and display the students based on credits earned from high to
low and by average from high to low. Also display all other
relevant information including availability to graduate.
Academic.java
public interface Academic {
double average();
double credits();
boolean graduate();
}
Student.java
public class Student implements Academic{
int studentID;
String firstName;
String lastName;
@Override
public String toString() {
return "Student [studentID=" +
studentID + ", firstName=" + firstName + ", lastName=" + lastName +
"]";
}
public Student(int studentID, String firstName,
String lastName) {
super();
this.studentID = studentID;
this.firstName = firstName;
this.lastName = lastName;
}
public int getStudentID() {
return studentID;
}
public void setStudentID(int studentID) {
this.studentID = studentID;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
@Override
public double average() {
// TODO Auto-generated method
stub
return 0;
}
@Override
public double credits() {
// TODO Auto-generated method
stub
return 0;
}
@Override
public boolean graduate() {
// TODO Auto-generated method
stub
return false;
}
public int compareTo(UnderGraduateStudent arg0)
{
// TODO Auto-generated method
stub
return 0;
}
public void setGrades(double[] grades) {
// TODO Auto-generated method
stub
}
}
UnderGraduateStudent.java
import java.util.Arrays;
public class UnderGraduateStudent extends Student{
double[] grades;
public UnderGraduateStudent(int studentID, String
firstName, String lastName,double[] grades) {
super(studentID, firstName,
lastName);
this.grades = grades;
// TODO Auto-generated constructor
stub
}
public double[] getGrades() {
return grades;
}
public void setGrades(double[] grades) {
this.grades = grades;
}
@Override
public String toString() {
return
super.toString()+"UnderGraduateStudent [grades=" +
Arrays.toString(grades) + "]";
}
@Override
public double average() {
// TODO Auto-generated method
stub
double sum =0;
for(int
i=0;i<grades.length;i++)
sum = sum +
grades[i];
return sum/grades.length;
}
@Override
public double credits() {
// TODO Auto-generated method
stub
double credit = 0;
for(int i=0;i<grades.length;i++)
{
if(grades[i]>=50)
credit = credit + 0.5;
}
return credit;
}
@Override
public boolean graduate() {
// TODO Auto-generated method
stub
double credit = credits();
if(credit>=10)
return
true;
return false;
}
}
GraduateStudent.java
import java.util.Arrays;
public class GraduateStudent extends Student{
double[] grades;
public GraduateStudent(int studentID, String
firstName, String lastName,double[] grades) {
super(studentID, firstName,
lastName);
this.grades = grades;
// TODO Auto-generated constructor
stub
}
public double[] getGrades() {
return grades;
}
public void setGrades(double[] grades) {
this.grades = grades;
}
@Override
public double average() {
// TODO Auto-generated method
stub
double sum =0;
for(int
i=0;i<grades.length;i++)
sum = sum +
grades[i];
return sum/grades.length;
}
@Override
public double credits() {
// TODO Auto-generated method
stub
double credit = 0;
for(int i=0;i<grades.length;i++)
{
if(grades[i]>=60)
credit = credit + 1;
}
return credit;
}
@Override
public boolean graduate() {
// TODO Auto-generated method
stub
double credit = credits();
if(credit>=6)
return
true;
return false;
}
@Override
public String toString() {
return
super.toString()+"GraduateStudent [grades=" +
Arrays.toString(grades) + "]";
}
}
Main..java
import java.util.Arrays;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method
stub
Student students[] = new Student[6];
// Under Graduate Students
double[] grades = { 10, 20, 30, 40,
60, 70, 80, 40, 90 };
students[0] = new
UnderGraduateStudent(1, "john", "Victor",grades);
double[]
grades1={60,70,80,40,90,60,70,80,20,90,100};
students[1] = new
UnderGraduateStudent(2, "john", "Jashuar",grades1);
double[]
grades2={60,70,80,40,90,60,70,80,20,90,100,60,50,60,67,87,58,74,57,57,78.98,98,77,76,86,79,58,37,80,98.89,70,98};
students[2] = new
UnderGraduateStudent(2, "betal", "Jeshan",grades2);
// Graduate Students
double[] grades3 = { 10, 20, 30,
40, 60, 70, 80, 40, 90 };
students[3] = new GraduateStudent(1, "john", "blaker",grades3);
double[] grades4={60,70,80,40,90,60,70,80,20,90,100};
students[4] = new
GraduateStudent(2, "guita", "Blake",grades4);
double[]
grades5={60,70,80,40,90,60,70,80,20,90,100,60,50,60,67,87,58,74,57,57,78.98,98,77,76,86,79,58,37,80,98.89,70,98};
students[5] = new
GraduateStudent(2, "john", "JPeterr",grades5);
for (int i = 0; i < 6;
i++)
{
for (int j = i + 1; j < 6; j++)
{
if (students[i].credits() > students[j].credits())
{
Student temp = students[i];
students[i] = students[j];
students[j] = temp;
}
}
}
for(int i=0;i<6;i++) {
System.out.println(students[i].toString());
System.out.println("Number of credits is "+
students[i].credits());
System.out.println("Graduate status is
"+students[i].graduate());
}
}
}
Output
Student [studentID=1, firstName=john,
lastName=Victor]UnderGraduateStudent [grades=[10.0, 20.0, 30.0,
40.0, 60.0, 70.0, 80.0, 40.0, 90.0]]
Number of credits is 2.0
Graduate status is false
Student [studentID=1, firstName=john,
lastName=blaker]GraduateStudent [grades=[10.0, 20.0, 30.0, 40.0,
60.0, 70.0, 80.0, 40.0, 90.0]]
Number of credits is 4.0
Graduate status is false
Student [studentID=2, firstName=john,
lastName=Jashuar]UnderGraduateStudent [grades=[60.0, 70.0, 80.0,
40.0, 90.0, 60.0, 70.0, 80.0, 20.0, 90.0, 100.0]]
Number of credits is 4.5
Graduate status is false
Student [studentID=2, firstName=guita,
lastName=Blake]GraduateStudent [grades=[60.0, 70.0, 80.0, 40.0,
90.0, 60.0, 70.0, 80.0, 20.0, 90.0, 100.0]]
Number of credits is 9.0
Graduate status is true
Student [studentID=2, firstName=betal,
lastName=Jeshan]UnderGraduateStudent [grades=[60.0, 70.0, 80.0,
40.0, 90.0, 60.0, 70.0, 80.0, 20.0, 90.0, 100.0, 60.0, 50.0, 60.0,
67.0, 87.0, 58.0, 74.0, 57.0, 57.0, 78.98, 98.0, 77.0, 76.0, 86.0,
79.0, 58.0, 37.0, 80.0, 98.89, 70.0, 98.0]]
Number of credits is 14.5
Graduate status is true
Student [studentID=2, firstName=john,
lastName=JPeterr]GraduateStudent [grades=[60.0, 70.0, 80.0, 40.0,
90.0, 60.0, 70.0, 80.0, 20.0, 90.0, 100.0, 60.0, 50.0, 60.0, 67.0,
87.0, 58.0, 74.0, 57.0, 57.0, 78.98, 98.0, 77.0, 76.0, 86.0, 79.0,
58.0, 37.0, 80.0, 98.89, 70.0, 98.0]]
Number of credits is 24.0
Graduate status is true
//Student.java
package Test.main;
public class Student implements Academic {
public long studentID;
public String fName;
public String lName;
public Student(long studentID, String fName, String lName) {
this.studentID = studentID;
this.fName = fName;
this.lName = lName;
}
public double Average() {
return 0;
}
public double Credits() {
return 0;
}
public boolean Graduate() {
return false;
}
public String toString() {
return fName + " "+ lName +" " + studentID ;
}
}
//UnderGraduate.java
package Test.main;
public class UndergraduateStudent extends Student{
int[] grades= new int[20];
UndergraduateStudent(long studentID, String fName, String lName,int grades[]) {
super(studentID,fName,lName);
this.grades = grades;
}
public double Average() {
int numberofCourses = grades.length;
double average = 0;
for(int i=0;i<numberofCourses;i++) {
average += grades[i];
}
return average/numberofCourses;
}
public double Credits() {
int numberofCourses = grades.length;
double credits = 0;
for(int i=0;i<numberofCourses;i++) {
if(grades[i]>50)
credits+=0.5;
}
return credits;
}
public boolean Graduate() {
if(Credits()>=10)
return true;
return false;
}
public String toString() {
return super.toString() + grades;
}
}
//Graduate.java
package Test.main;
public class GraduateStudent extends Student{
int grades[];
String thesis;
int weeklyHours;
GraduateStudent(long studentID, String fName, String lName,int grades[], String thesis, int weeklyHours) {
super(studentID,fName,lName);
this.grades = grades;
this.thesis = thesis;
this.weeklyHours = weeklyHours;
}
public double Average() {
int numberofCourses = grades.length;
double average = 0;
for(int i=0;i<numberofCourses;i++) {
average += grades[i];
}
return average/numberofCourses;
}
public double Credits() {
int numberofCourses = grades.length;
double credits = 0;
for(int i=0;i<numberofCourses;i++) {
if(grades[i]>60)
credits++;
}
return credits;
}
public boolean Graduate() {
if(Credits()>=6)
return true;
return false;
}
public String toString() {
return super.toString() + grades+ "" +thesis+ "" + weeklyHours;
}
}
//Main.java
package Test.main;
import java.util.*;
import java.io.*;
interface Academic{
double Average();
double Credits();
boolean Graduate();
String toString();
}
public class Main {
public static void main(String args[]) {
UndergraduateStudent [] UG;
UG = new UndergraduateStudent[3];
int grades1[] = new int[] {48,49,50,52,53,43,78,67,76,56,48,82,81,71,61,61,83,84,74,74};
int grades2[] = new int[] {90,89,50,52,53,43,78,67,76,56,48,82,81,71,61,61,83,84,74,74};
int grades3[] = new int[] {77,78,50,52,53,43,78,67,76,56,48,82,81,71,61,61,83,84,74,74};
UG[0] = new UndergraduateStudent(123, "James" , "Bond" , grades1);
UG[1] = new UndergraduateStudent(456, "Lord" , "Snow" , grades2 );
UG[2] = new UndergraduateStudent(789, "Tom" , "Cruise", grades3);
GraduateStudent [] G;
G = new GraduateStudent[3];
int grades4[] = new int[] {52,53,43,78,67,76,56,48,82,81};
int grades5[] = new int[] {50,52,53,43,78,67,76,56,48,82};
int grades6[] = new int[] {77,78,50,52,53,43,78,67,76,56};
G[0] = new GraduateStudent(112, "Robin", "Singh", grades4, "Recognition System", 20);
G[1] = new GraduateStudent(112, "Sachin", "Ramesh", grades5, "Recommendation System",40);
G[2] = new GraduateStudent(112, "Virendra", "Sehwag", grades6, "Mobile System",30);
double [] avg;
avg = UG.Average();
double [] crd;
crd = UG.Credits;
Arrays.sort(avg);
Arrays.Sort(crd);
double [] avg1;
avg1 = UG.Average();
double [] crd1;
crd1 = UG.Credits;
Arrays.sort(avg1);
Arrays.Sort(crd1);
System.out.printf("Modified arr[] : %s", Arrays.toString(UG));
System.out.printf("Modified arr[] : %s", Arrays.toString(G));
}
}
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