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‎Abstract/Abstract - Exercise 1.java

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abstract class Student{
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//Implement your code here
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private String studentName;
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private int[] testScores;
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private String testResult;
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public Student(String studentName){
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this.studentName=studentName;
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this.testScores=new int[4];
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}
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// Getter for studentName
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public String getStudentName() {
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return studentName;
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}
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// Setter for studentName
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public void setStudentName(String studentName) {
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this.studentName = studentName;
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}
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// Getter for testScores
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public int[] getTestScores() {
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return testScores;
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}
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// Setter for testScores
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public void setTestScore(int testNumber,int testScore) {
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this.testScores[testNumber] = testScore;
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}
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// Getter for testResult
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public String getTestResult() {
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return testResult;
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}
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// Setter for testResult
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public void setTestResult(String testResult) {
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this.testResult = testResult;
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}
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public abstract void generateResult();
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}
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class UndergraduateStudent extends Student{
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//Implment your code here
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public UndergraduateStudent(String studentName){
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super(studentName);
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}
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public void generateResult(){
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int[] testScores=new int[4];
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int sum=0,avg;
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testScores=getTestScores();
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for(int score:testScores)
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sum+=score;
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avg=sum/testScores.length;
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if(avg>=60)
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setTestResult("Pass");
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else
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setTestResult("Fail");
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}
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}
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class GraduateStudent extends Student{
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//Implment your code here
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public GraduateStudent(String studentName){
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super(studentName);
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}
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public void generateResult(){
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int[] testScores=new int[4];
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int sum=0,avg;
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testScores=getTestScores();
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for(int score:testScores)
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sum+=score;
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avg=sum/testScores.length;
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if(avg>=70)
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setTestResult("Pass");
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else
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setTestResult("Fail");
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}
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}
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class Tester {
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public static void main(String[] args) {
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UndergraduateStudent undergraduateStudent = new UndergraduateStudent("Philip");
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undergraduateStudent.setTestScore(0, 70);
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undergraduateStudent.setTestScore(1, 69);
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undergraduateStudent.setTestScore(2, 71);
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undergraduateStudent.setTestScore(3, 55);
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undergraduateStudent.generateResult();
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System.out.println("Student name: "+undergraduateStudent.getStudentName());
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System.out.println("Result: "+undergraduateStudent.getTestResult());
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System.out.println();
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GraduateStudent graduateStudent = new GraduateStudent("Jerry");
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graduateStudent.setTestScore(0, 70);
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graduateStudent.setTestScore(1, 69);
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graduateStudent.setTestScore(2, 71);
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graduateStudent.setTestScore(3, 55);
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graduateStudent.generateResult();
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System.out.println("Student name: "+graduateStudent.getStudentName());
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System.out.println("Result : "+graduateStudent.getTestResult());
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//Create more objects of the classes for testing your code
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}
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}

‎Array/Array - Exercise 1.java

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class Tester {
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public static int calculateSumOfEvenNumbers(int[] numbers){
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//Implement your code here and change the return value accordingly
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int sum=0;
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for(int i:numbers){
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if(i%2==0)
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sum+=i;
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}
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return sum;
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}
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public static void main(String[] args) {
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int[] numbers = {68,79,86,99,23,2,41,100};
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System.out.println("Sum of even numbers: " +calculateSumOfEvenNumbers(numbers));
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}
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}

‎Association/Aggregation - Assignment 3.java

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class Room {
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//Implement your code here
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//Uncomment the below method after implementation before verifying
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//DO NOT MODIFY THE METHOD
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/*
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public String toString(){
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return "Room\nroomNo: "+this.roomNo+"\ncapacity: "+this.capacity;
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}
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*/
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private int roomNo;
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private int capacity;
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private static int roomCounter;
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static {
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roomCounter = 500;
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}
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public Room() {
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this.roomNo = roomCounter;
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roomCounter++;
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this.capacity = 4;
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}
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// Getter and Setter methods for roomNo
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public int getRoomNo() {
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return roomNo;
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}
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public void setRoomNo(int roomNo) {
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this.roomNo = roomNo;
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}
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// Getter and Setter methods for capacity
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public int getCapacity() {
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return capacity;
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}
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public void setCapacity(int capacity) {
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this.capacity = capacity;
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}
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// Getter and Setter methods for roomCounter
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public static int getRoomCounter() {
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return roomCounter;
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}
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public static void setRoomCounter(int roomCounter) {
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Room.roomCounter = roomCounter;
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}
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public String toString() {
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return "Room No: " + roomNo + ", Capacity: " + capacity;
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}
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}
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class Member {
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//Implement your code here
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//Uncomment the below method after implementation before verifying
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//DO NOT MODIFY THE METHOD
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/*
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public String toString(){
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return "Member\nmemberId: "+this.memberId+"\nname: "+this.name;
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}
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*/
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private int memberId;
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private String name;
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private Room room;
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public Member(int memberId, String name) {
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this.memberId = memberId;
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this.name = name;
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}
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public int getMemberId() {
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return memberId;
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}
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public void setMemberId(int memberId) {
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this.memberId = memberId;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Room getRoom() {
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return room;
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}
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public void setRoom(Room room) {
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this.room = room;
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}
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public String toString() {
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return "Member ID: " + memberId + ", Name: " + name + ", Room: " + (room != null ? room.getRoomNo() : "Not Assigned");
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}
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}
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class Admin {
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//Implement your code here
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public void assignRoom(Room[] rooms, Member member) {
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System.out.println("Assigning room for Member ID: " + member.getMemberId() + ", Name: " + member.getName());
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for (Room room : rooms) {
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if (room.getCapacity() > 0) {
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room.setCapacity(room.getCapacity() - 1);
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member.setRoom(room);
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System.out.println("Room assigned for Member ID: " + member.getMemberId() + ", Name: " + member.getName() + " is Room No: " + room.getRoomNo());
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return;
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}
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}
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System.out.println("No available rooms for Member ID: " + member.getMemberId() + ", Name: " + member.getName());
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}
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}
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class Tester {
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public static void main(String args[]) {
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Room room1 = new Room();
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Room room2 = new Room();
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Room room3 = new Room();
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Room room4 = new Room();
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Room room5 = new Room();
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Room[] totalRooms = { room1, room2, room3, room4, room5 };
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Admin admin = new Admin();
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Member member1 = new Member(101, "Serena");
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Member member2 = new Member(102, "Martha");
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Member member3 = new Member(103, "Nia");
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Member member4 = new Member(104, "Maria");
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Member member5 = new Member(105, "Eva");
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Member[] members = { member1, member2, member3, member4, member5 };
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for (Member member : members) {
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admin.assignRoom(totalRooms, member);
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if(member.getRoom()!=null) {
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System.out.println("Hi "+member.getName()+"! Your room number is "+member.getRoom().getRoomNo());
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}
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else {
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System.out.println("Hi "+member.getName()+"! No room available");
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}
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}
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}
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}
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‎Association/Association - Exercise 1.java

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class CabServiceProvider{
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//Implement your code here
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private String cabServiceName;
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private int totalCabs;
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public CabServiceProvider(String cabServiceName, int totalCabs) {
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this.cabServiceName = cabServiceName;
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this.totalCabs = totalCabs;
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}
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public String getCabServiceName() {
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return cabServiceName;
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}
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public void setCabServiceName(String cabServiceName) {
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this.cabServiceName = cabServiceName;
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}
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public int getTotalCabs() {
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return totalCabs;
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}
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public void setTotalCabs(int totalCabs) {
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this.totalCabs = totalCabs;
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}
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public double calculateRewardPrice(Driver driver) {
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float averageRating = driver.getAverageRating();
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double bonus = 0;
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if (averageRating >= 4 && averageRating <= 5) {
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switch (cabServiceName) {
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case "Halo":
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if (averageRating >= 4.5) {
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bonus = 10 * averageRating;
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} else {
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bonus = 5 * averageRating;
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}
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break;
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case "Aber":
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if (averageRating >= 4.5) {
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bonus = 8 * averageRating;
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} else {
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bonus = 3 * averageRating;
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}
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break;
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default:
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bonus = 0;
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}
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}
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return Math.round(bonus * 100.0) / 100.0;
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}
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}
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class Driver {
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private String driverName;
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private float averageRating;
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public Driver(String driverName, float averageRating){
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this.driverName=driverName;
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this.averageRating=averageRating;
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}
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public String getDriverName(){
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return this.driverName;
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}
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public void setDriverName(String driverName){
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this.driverName=driverName;
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}
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public float getAverageRating(){
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return this.averageRating;
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}
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public void setAverageRating(float averageRating){
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this.averageRating=averageRating;
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}
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//DO NOT MODIFY THE METHOD
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//Your exercise might not be verified if the below method is modified
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public String toString(){
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return "Driver\ndriverName: "+this.driverName+"\naverageRating: "+this.averageRating;
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}
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}
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class Tester {
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public static void main(String args[]){
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CabServiceProvider cabServiceProvider1 = new CabServiceProvider("Halo", 50);
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Driver driver1 = new Driver("Luke", 4.8f);
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Driver driver2 = new Driver("Mark", 4.2f);
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Driver driver3 = new Driver("David", 3.9f);
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Driver[] driversList = { driver1, driver2, driver3 };
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for (Driver driver : driversList) {
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System.out.println("Driver Name: "+driver.getDriverName());
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double bonus = cabServiceProvider1.calculateRewardPrice(driver);
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if (bonus>0)
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System.out.println("Bonus: $"+bonus+"\n");
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else
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System.out.println("Sorry, bonus is not available!");
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}
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//Create more objects of CabServiceProvider and Driver classes for testing your code
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}
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}

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