Week 3 - Day 1

    package week3.day1;

    public class AccessCreditCard {

        public static void main(String[] args) {
            
            CreditCard access = new CreditCard();
            System.out.println(access.getCreditCardNumber());
            access.setCreditCardNumber("1111 1111 1111 1111");
            System.out.println(access.getCreditCardNumber());
        }

    }

    package week3.day1;

    public interface Android {
        
        public void getKernerlInfo();
        
        public void getKeyboardType();

    }

    package week3.day1;

    public class Auto extends Vehicle{
        
        public void startUsingHandStart() {
            System.out.println("The auto is started using hand start");
        }

    }

    package week3.day1;

    public class BajajAuto extends Auto {

        public void fillGas() {
            System.out.println("The auto is loaded with the LPG");
        }
        
    }

    package week3.day1;

    public class BMW extends Car{
        
        public void openSunRoof() {
            System.out.println("Sunroof is open");
        }
        
        public void applyBrake() {
            System.out.println("The ABS brake is applied");
        }

    }

    package week3.day1;

    public class BuildHouse {

        public static void main(String[] args) {
            
            // Wanted to create an object
            // ClassName obj = new ClassName();
            // House build = new House();
            /*MyHouse build = new MyHouse();
            build.getAddress();
            build.getNumberOfBedRooms();
            System.out.println(build.baseColor); */
            
            //PartialHouse build = new PartialHouse();
            BuildNewHouse build = new BuildNewHouse();
            build.buildLivingRoom();
            build.buildKitchen();
            build.buildRoof();
            

        }

    }

    package week3.day1;

    // Extends -> build parent - child relationship !!
    public class BuildNewHouse extends PartialHouse{

        public void buildRoof() {
            System.out.println("Roof is ready");
            
        }

        
    }

    package week3.day1;

    public class BuyVecicle {

        public static void main(String[] args) {
            
            BMW myCar = new BMW();
            myCar.openSunRoof();// BMW
            myCar.turnAC(); 	// Car
            myCar.applyBrake(); // BMW 
            //myCar.applyABS();   // ABS
            
            BajajAuto myAuto = new BajajAuto();
            myAuto.startUsingHandStart(); // Auto
            myAuto.fillGas(); // Bajaj
            myAuto.applyBrake(); // Vehicle

        }

    }

    package week3.day1;

    public class Car extends Vehicle{
        
        public void turnAC() {
            System.out.println("Turned ON the air condition");
        }

    }

    package week3.day1;

    public class ConcreteClass {
        
        public  void run() {
            
        }

    }

    package week3.day1;

    public class CreditCard {
        
        private String creditCardNumber = "2019 9292 2992 2939";

        public String getCreditCardNumber() {
            return creditCardNumber;
        }

        public void setCreditCardNumber(String creditCardNumber) {
            this.creditCardNumber = creditCardNumber;
        }

        

    }

    package week3.day1;

    public interface House {
        
        // Variable
        public static String baseColor = "White";
        
        // Method -> Interface methods cannot have body (the implementation)
        // 100% abstract 
        public int getNumberOfBedRooms();
        
        // Address
        public String getAddress();
        
        // Interface cannot have constructor and hence
        // You cannot create an object for the interface !!
        
        
        // Exception: From Java 8, default methods are allowed with implementation !!
        // We will learn this week 8.
        
        

    }

    package week3.day1;

    public class Lunch {
        
        /*
        * Within the same class, you have more than 1 method
        * - with same signature
        * - with different input arguments
        * - can be by number of arguments or data type of arguments
        * 
        * What is real purpose?
        * Simplify the verbose 
        * 
        * This will be known when you code itself !! Compile time polymorphism
        * 
        */
        
        public String bringLunch() {
            return "Variety Rice";
        }
        
        public String bringLunch(String type) {
            if(type.equalsIgnoreCase("potluck"))
                return "Chicken Briyani";
            else
                return "Curd Rice";
        }

    }

    package week3.day1;

    // Concrete class -> Class with complete implementation !!

    public class MyHouse implements House{

        public int getNumberOfBedRooms() {
            return 3;
        }

        public String getAddress() {
            return "25, Poes Garden, Chennai";
        }
        
    }

    package week3.day1;

    public class MyPhone {
        
        public static void main(String[] args) {
            Samsung myPhone = new Samsung();
            myPhone.getKernerlInfo();
            
            OnePlus myNewPhone = new OnePlus();
            myNewPhone.getKernelInfo();
            myNewPhone.setMemOptimization();
        }

    }

    package week3.day1;

    public class OnePlus extends Oxygen{

        @Override
        public void getKernelInfo() {
            System.out.println("The kernel is designed for playing games");
            
        }

    }

    package week3.day1;

    public abstract class Oxygen {
        
        public void setMemOptimization() {
            System.out.println("Implemented");
        }
        
        public abstract void getKernelInfo();

    }

    package week3.day1;


    // Partially implemented class + Design to implement by concrete class
    // May have unimplemented methods and hence
    // Abstract class does not allow you to create object

    public abstract class PartialHouse {

        public void buildKitchen() {
            System.out.println("Modular Kitchen ready");
        }
        
        public void buildLivingRoom() {
            System.out.println("Modern Living Room ready");
        }
        
        public abstract void buildRoof();
        
    }

    package week3.day1;

    public class RowHouse implements House{

        public int getNumberOfBedRooms() {
            // TODO Auto-generated method stub
            return 0;
        }

        public String getAddress() {
            // TODO Auto-generated method stub
            return null;
        }

    }

    package week3.day1;

    public class Samsung implements Android{

        public void getKernerlInfo() {
            System.out.println("The kernel is built on C++ with Kysis");
        }

        public void getKeyboardType() {
            System.out.println("The keyboard with android icons");	
        }

    }

    package week3.day1;

    public class Vehicle {
        
        public void applyBrake() {
            System.out.println("The brake is applied");
        }
        
        public void soundHorn() {
            System.out.println("Horn to let people know that my vehicle is coming");
        }

    }