Week1 - Day 1

	package week1.day1;

	public class Airplane {
		
		// Actions -> applyBrake , takeLeft, turnHeadLight, turnAC !! 
		/*
		* 4 Pillars 
		* 
		* 1) Access Modifier - public, private, protected, default/package
		* 2) Return Type (output)  - primitive data type / Class / void -> not to return anything
		* 3) Method Name  - Name of the method (meaningful name -> verbNoun)
		* 4) Input Argument -> Input to your method (0/1/...) -> Primitive/class
		* 
		* last one -> logic !!
		* 
		*/
		
		public void applyBrake(String brakeType) {
			System.out.println("The brake with type "+brakeType+" applied");
		}
		
		public boolean takeLeft() {
			return true;
		}
		
		public String getFlightName() {
			return "Boeing";
		}
		
		/*Mobile class

		write 3 methods
		one method with void as return type -> syso
		method 2 -> should return boolean
		method 3 -> should return String */
		
		/*
		* 4 Access Modifiers for a method / variable:
		* 
		*  public		: Anyone can access (within or outside the project)
		*  private 	: Only within the class alone can access 
		*  protected	: Others within the same package can access 
		*  			  or inherited members can access
		*  default / package : Others within the same package can access 
		*  
		*  2 Access Modifiers for a class
		*  
		*  public 		: Anyone can access
		*  default		: Only member of the same package can access
		* 
		*/
		
		/*
		* public 	- profile / name / blood group 
		* package - posts, photo, status
		* private	- password / dob 
		* protected - dob, activities, mobile number
		* 
		*/
		
		/*
		* public 		- common area, mini hall, door bell, lift, security
		* package 	- Gym, Swimming pool, terrace, car park, play area 
		* private		- keys / bedroom
		* protected 	- credit card / mobile / 
		* 
		*/
		
		/*
		* Input argument -> Zero or multiple argument
		* primitive data type or it can be class
		* 
		* add numbers -> what you need as input? 
		* 1) How many inputs? 2 inputs -> data type and number of inputs
		* 2) What data type? int / long / float / double 
		* 
		* 2 input, both are int !! -> add 2 numbers -> int as return type
		* 3,4 -> 7 (int)
		* 3.2f, 4.5f -> 7.7f(float)
		* 
		* did you eat? do you need input from me? (zero argument)
		* what will you return -> boolean 
		* 
		* Assume, you have 2 cars with you and 2 different color !! 
		* what is color of your car? -> Do you need an input?
		* What input will you ask me?  which car?  Model / brand 
		* What will you return? Color -> String 
		* 
		* What was your previous project name? (Assume you worked on multiple)
		* Do you need more input? 1, 2, 3 (int)
		* What will you return back to me? String -> Name of the project
		* "Automax" 
		* 
		* 
		*/
		
		
		
		
		
		
		
		
		
		
		

	}

	package week1.day1;

	// Java reserved keywords - lowercase - dark pink / purple

	// interface, enum, @interface
	public class Car {
		
		// primitive data type works
		boolean isNewCar = false;
		// boolean -> data type of the variable 
		// isNewCar -> name of the variable
		// = -> assignment operator
		// true -> value of that variable 
		char logo = 'M';
		// character is represented in single quote
		
		// Kilometers the car has run
		int run = 200000;
		
		// Chasis number (long number)
		long chasis = 8283883788l;
		
		// How many liters of petrol you to be filled
		float petrol = 1.12f;
		
		// Represent long decimal
		double percentage =  10.31232;
		
		// Exception: String -> Class 
		String brand = "Maruti";
		
		String regNum = "TN22BU0005";
		
		

	}

	package week1.day1;

	public class ConditionalStatements {

		public static void main(String[] args) {
		
			int regNumber = 4000;
			
			// Audi -> 1234 => Red , BMW -> 4567 -> White , Ferrari -> 1001 -> Gray, 
			// Hyundai -> 4000 -> Red , MG -> 5005 -> Black !!
			if(regNumber == 1234 || regNumber == 4000) // Compare operator
				System.out.println("Red");
			else if(regNumber == 4567)
				System.out.println("White");
			else if(regNumber == 1001)
				System.out.println("Gray");
			else
				System.out.println("Black");
			
			// Expected print -> Red
			// Arithmetic Operations
			// + (add)   - (sub) * (multiply)  / (division -> quotient)
			// remainder % (mod)
			// 12 % 5 ->  2 

		}

	}

	package week1.day1;

	public class MyVehicles {

	/*
		* Main method is the entry point for java execution
		* Any code you write inside main method -> will get executed
		* public -> access modifier 
		* static -> create single memory in Java 
		* void -> return type
		* main -> method name
		* String[] args -> input arguments
		*/
	public static void main(String[] args) {
		// How to access other classes -> you are trying to call your school mate?
		// Store the number in the phone (your memory) -> call or sms or whatsapp 
		// Syntax 1: Create reference to that class (saving to the memory)
		// Syntax: ClassName reference = new ClassName();
		Airplane myFlight = new Airplane(); 
		// Send SMS to him stating that you will call him tomorrow
		// Syntax 2: Call the method of that class using the reference
		// Syntax: reference.methodName();
		myFlight.applyBrake("Back");
		boolean isLeft = myFlight.takeLeft();
		System.out.println(isLeft);
		String flightName = myFlight.getFlightName();
		System.out.println(flightName);
		System.out.println("^^^^^^^^^^^^^^^^^");
		// How to access variables 
		// Create reference, call variable
		Car myCar = new Car();
		boolean isNewCar = myCar.isNewCar;
		System.out.println(isNewCar);
		System.out.println(myCar.run);
		
		
	}

	/*	-> Call Mobile class
		-> Create a main method
		-> Within main method,
			Call each of the 3 methods and print the values */

	}

	package week1.day1;

	public class Welcome {

		public static void main(String[] args) {
			
			// Single line comment
			System.out.println("Welcome each one of you !!");

		}

	}