Question

5: Assume that a Sports Club at the University wishes to store details about its members. Design and implement a Java application to support this requirement. The application should be able to print out and manage information about the members of the club. The following guidelines should be used to construct the applicatiorn a: A Java class, called Member, should be defined to store and manage member details. The class should include methods for updating member details and querying their registration status i.e. are they fully paid up members of the club Each member of the club should also have a unique membership id number, this number is automatically assigned when the member object is created. The Member class should implement the Comparable interface and use the membership id number to define the natural order for these objects 10 MARKS b: Define another Java class, called SportsClub, that will be used to manage club membership and access details about individual members. Member objects added to the SportsClub should be stored using a suitable collection object. Member objects should be sorted by their id number as they are added to the collection. SportsClub should include methods for adding new members removing members and returning a list of current members. 10 MARKS c: Write a short driver program, in a class called ClubManager, that creates an instance of SportsClub and uses its methods to add, lookup and remove club members. The program should also be able to save the full application state on exit, using Object Serialization, and load up the saved state at startup

Answer 1

Done. Have a look and in case of any doubt leave a comment.

/////////////////////////////////////Member.java/////////////////////////////////////

package com.java.sportsClub;

import java.util.ArrayList;

import java.util.Collections;

//Member class which implements Comparable interface and implement CompareTo using membership id.

public class Member implements Comparable<Member> {

private int membershipId;

private boolean isFullyPaid;

private String name;

private static ArrayList<Integer> numbers = new ArrayList<>();

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getMembershipId() {

return membershipId;

}

public void setMembershipId(int membershipId) {

this.membershipId = membershipId;

}

public boolean isFullyPaid() {

return isFullyPaid;

}

public void setFullyPaid(boolean isFullyPaid) {

this.isFullyPaid = isFullyPaid;

}

// create a arraylist of integers from 1-100 for generating random nymbers later

static {

for (int i = 0; i < 100; i++) {

numbers.add(i + 1);

}

}

@Override

// It should return a negative integer, if the current

// object is less than the passed one, and positive integer if

// greater than, and 0 if equal.

public int compareTo(Member arg0) {

// TODO Auto-generated method stub

if (this.membershipId == arg0.membershipId) {

return 0;

}

if (this.membershipId < arg0.membershipId) {

return -1;

} else {

return 1;

}

}

// Constructor with two parameters and assign membership id automatically

public Member(String name, boolean isFullyPaid) {

this.name = name;

this.isFullyPaid = isFullyPaid;

this.membershipId = generateRandomNumber();

}

// generate random number

private int generateRandomNumber() {

Collections.shuffle(numbers);

// System.out.println("Elem : " + numbers.get(0));

return numbers.get(0);

}

@Override

// print all information about Members i.e. name, id and isFullyPaid or not

public String toString() {

return "Name=" + name + ", membershipId=" + membershipId + ", isFullyPaid=" + isFullyPaid;

}

}

///////////////////////////End Member.java//////////////////////////////////////////////////////

////////////////////////////////SportsClub.java//////////////////////////////////////

package com.java.sportsClub;

import java.util.ArrayList;

import java.util.Collections;

//Class that maintains list of members. Manage them

public class SportsClub {

// list of members

private ArrayList<Member> members = new ArrayList<>();

// add new member and sort them

public void addMemember(Member member) {

this.members.add(member);

Collections.sort(members);

}

// return list of all member

public ArrayList<Member> getMembers() {

return this.members;

}

// If the parameter given is in the list them remove from list

public void removeMember(Member m) {

if (members.contains(m)) {

members.remove(m);

System.out.println("Removed element " + m);

return;

}

}

// search for the paramter member. Return member if found . Null otherwise

public Member findMember(Member m) {

for (int i = 0; i < members.size(); i++) {

if (members.get(i).equals(m)) {

return members.get(i);

}

}

return null;

}

}

////////////////////////////////End SportsClub.java//////////////////////////////////////

///////////////////////////ClubManager.java/////////////////////////////////////////

package com.java.sportsClub;

//Driver class to test SportsCLub and Member class

public class ClubManager {

public static void main(String args[]) {

// create instance of SportsClub

SportsClub club = new SportsClub();

// add memebers to club

Member member1 = new Member("Member1", false);

Member member2 = new Member("Member2", true);

Member member3 = new Member("Member3", false);

Member member4 = new Member("Member4", true);

club.addMemember(member1);

club.addMemember(member2);

club.addMemember(member3);

club.addMemember(member4);

// Print list of all the members

for (int i = 0; i < club.getMembers().size(); i++) {

System.out.println(club.getMembers().get(i).toString());

}

// find Member

Member r = club.findMember(member4);

System.out.println(r == null ? "Member Not Found" : ("Member Found " + r.toString()));

// Remove the element

club.removeMember(r);

// we removed the element so nothing will be returned after findMember

r = club.findMember(member4);

System.out.println(r == null ? ("Member Not Found") : ("Member Found " + r.toString()));

}

}

///////////////////////////End SportsManager.java/////////////////////////////////////////

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