Session1 Notes

Java - A concurrent class based statically typed language concurrent class based statically typed platform independent

Amazon On Fri : Mobile Phone 10575.55 17.5k 532.88 On Sat : Mobile Phone 10575.55 21.75k

1. Time
2. Accuracy

Why Software (Program) Hence, need of PL

Java

Orange Juice in Making

Orange -> Source

Juicer

Liquid Juice

Pack It

_/ Glass -> End Result

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MyApp.cpp -> Source Code | High Level Language

Compiler -> Pre Built Software for us

MyApp.obj -> Object Code | Low Level Code

Pack It

W MyApp.exe -> Executable Code M MyApp.dmg L MyApp.sh

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MyApp.java -> Source Code | High Level Language

Compiler

MyApp.class -> Bytecode

Thats it

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MyApp.py

Thats It

JVM Java Virtual Machine | Pre-Installed To execute .class files i.e. Java Bytecode -> Machine Codes

JDK Java Development Kit is a TOOL KIT | Library | Compiler | Interpreter

JRE Java Runtime Environment Gets Installed with JDK

Step # 1 : Install JDK Step # 2 : Install Eclipse / IntelliJ / Netbeans

Java JSE | Java Standard Edition Desktop Apps JEE | Java Enterprise Edition Web Apps JME | Java Mobile Edition Feature Phones

SOFTWARE ARCHITECTURE

MODEL VIEW CONTROLLER

MODEL -> Data (Required to solve a Problem) VIEW -> UI i.e. User Interface (Required to take data as input from user and show some data to user) CONTROLLER -> Computation + Conditional Flow + Iterations -> LOGIC to Solve Problem

Uber

Use Case : Book a Ride on Uber (PROBLEM)

MODEL sourceLocation destinationLocation typeOfCab typeOfPayment bookForWhome favLocations

View Uber GUI

CONTROLLER Shortest Distance Least Traffic TimeToSource TimeToDest Calculation of Fare

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MVC : MODEL VIEW CONTROLLER

Model > Model means Data > Data Must be Stored in the Memory > We need containers to Store Data in memory 1. Single Value Container 2. Multi Value Container 2.1 Homogeneous 2.2 Hetrogeneous

	Static Storage Containers : Size is Fixed (Primitives)-> Single Value
	Dynamic Storage Container : Size can be adjusted dynamically

Storage containers are variables in basic terminology		


Lets Consider a use case
Amazon Pay CashBack

Amount 1000
Cashback flat 10% i.e. 100


CONTROLLER (LOGIC to Solve Problem)
	1. Computation		 -> Operators
	2. Conditional Flow 
	3. Iterations