Question

Create a java class for an object called Student which contains the following private attributes: a given name (String), a surname (family name) (String), a student ID number (an 8 digit number, String or int) which does not begin with 0. There should be a constructor that accepts two name parameters (given and family names) and an overloaded constructor accepting two name parameters and a student number. The constructor taking two parameters should assign a random number of 8 digits. The constructor should check if the given number is between 8 and 10 digits long. There should be public accessors (“getters”) for each of the 3 attributes and there should be a public mutator (“setters”) for the first and last name, but not for the student ID number. There should be a public toString() method that returns the name of the student written as: family, given (student ID).

In addition to the above requirements, your student class should include an integer representing the number of courses this student has completed, and an array of all the grades the student has earned. There should also be a void method called：

void addGrade(int g)

which will increment the number of grades the student has completed, and replace the old array with a new and larger array containing the passed-in grade.

There should also be a method double getAverage() which returns the average of all grades obtained by this student.

The class should contain an override of the boolean equals(Object o) method which will return true whenever this student number is equal to o’s student number (names do not count since many students could have the same name).

Also include a method called String generateEmailAddress() which returns a string. The returned string should be all lowercase and in the form [alias]@alumni.ubc.ca where [alias] is created using the first letter of the given name concatenated with the last word of the family name. For example, of a student has given name “Oscar” and surname “de la Hoya” then the email address should be [email protected] .

Your class does not require a main() method.

Answer 1

Step 1: create a new Java Class called Main.java and paste the following code

<=============(this line is not in the code) ===============>

import java.util.concurrent.ThreadLocalRandom;
import java.util.*;
public class Main
{
   public static void main(String[] args) {
       Student s = new Student("tony","Stark",12000000);
       Student s1 = new Student("cap","America",22000000);
       System.out.println(s.GetName());
       System.out.println(s.generateEmailAddress());
       System.out.println(s1.generateEmailAddress());
   }
}

class Student{
String name = "";
String surName = "";
long id = 0;
int coursesCount = 0;
ArrayList<Integer> list = new ArrayList<Integer>();
  
// constructor of the Student class
public Student(String s_name,String s_surName ){
name = s_name;
surName = s_surName;
id = (long) (Math.random() * ((99999999 - 10000000) + 1)) + 10000000;
}
// constructor of the Student class
public Student(String s_name,String s_surName ,long s_id){
name = s_name;
surName = s_surName;
id = s_id;
}
// mutator of the name member
public void SetName(String s_name){
name = s_name;
}
// mutator of the surName member
public void SetSurName(String s_surName){
surName = s_surName;
}
// mutator of the id member
public void SetID(long s_id){
id = s_id;
}
// accessor of the name member
public String GetName(){
return name;
}
// accessor of the surname member
public String GetSurName(){
return surName;
}
// accessor of the id member
public long GetID(){
return id;
}
// adding grade into the list of the marks
public void addGrade(int marks){
coursesCount += 1;
list.add(marks);
}

// overridden method
public boolean equals(Student obj)
{
if(this.id == obj.GetID())
return true;
else{
return false;
}
}

// this generates the email address
public String generateEmailAddress(){
String email = String.valueOf(name.charAt(0));
String[] words = surName.split("\\s");
email += words[words.length - 1];
email += "@alumni.ubc.ca";
return email.toLowerCase();
}

}

<====================================>

Note: if you want to separate out the student class then paste the student class code into the new File named Student.java

Step 2: Compile and run your code

Here is sample run of this code.

any problem ask me in the comment section

Thumbs up is appreciated.