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Intro
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Practice Practice Practice
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Textbook
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Discord
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What is Java
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What can you build with Java
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Java Usages
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Compliled vs Interpreted Languages
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Static vs Dynamic Type Checking
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Java version history
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IntelliJ IDEA
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jetbrains.com/idea
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Jetbrains ToolBox
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Quick Word Before We Begin
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Create Project - Part 1
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Create Project - Part 2
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Your First Java Program
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Compiling and Running via Terminal
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Fixing Compilation Errors
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View ByteCode
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Public Static Void Main
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Understanding Java Code
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SOUT Keyboard Shortcut
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Reserved Keywords
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Comments
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Variables
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Primitives Data Types Difference
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Numeric Literals with Underscore
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Arithmetic Operators
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Increment and Decrement Operators
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Comparison Operators
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Short hand re-assignment
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Naming Variables
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Strings
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String API Documentation
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Reference Types and Objects
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Reference Types and Objects Diferences
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Pass py value with Primitives
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Pass py value with Reference Types
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Arrays
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0 and Null Values for Arrays
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Quick word on Arrays
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TextBook and Exercises
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How To Attempt Exercises
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Quick word on the CLI Project
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For Loop
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Loops and Arrays
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Enhanced For Loop
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For i vs Enhanced For Loop
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While Loop
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Do While
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If Statements
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If Statements with Conditions
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Else If
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AND Logical Operators
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OR Logical Operators
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Logical Operators Recap
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! on ifs
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Dont do this with if statements
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Switch Statement
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Data Types for Enums
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New Switch Expression
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Packages
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Creating Packages
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Exploring Packages
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Import keyword
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Optmizing imports
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Import with fully qualified name
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No Import for java lang
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Access Modifiers Intro
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Public Access Modifier
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Private
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Default
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Recap
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When To Use Each Access Modifier
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Static Keyword
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Methods
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Method that add 2 numbers
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Parameters and Arguments
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Void methods
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Naming Convention
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Exercise
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Exercise Solution
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Understanding public static void main
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Program Arguments
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Type Inference with Var
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Break Keyword and Loops
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Continue
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Return Keyword and Void Methods
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Final Keyword
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Enums
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Enums Methods
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Implicit and Explicit Type Casting
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Global and Local Variables
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Wrapper Classes
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Working With Strings
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How Strings are stored in memory
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Strings are Immutable
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String Literal vs String Object
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Comparing Strings with ==
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Comparing Strings with .equals
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Useful String static Methods
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LocalDateTime
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LocalDate and LocalTime
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Creating Specif Dates
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ZoneIds
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Other Date Classes
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The Problem With double
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BigDecimal
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Exploring BigDecimal Methods
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Scanner
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NextInt and other data types
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Outro
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Intro
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What is an exception
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Try Catch
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Multiple Catch Blocks
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Using Or Within Catch
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The Exception Class
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Finally Keyword
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Exception Hierarchy
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Uncheck Exceptions
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Checked Exceptions
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Throw and Throws
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Throwing Exceptions
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When To Use Checked VS Unchecked Exeptions
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Creating Custom Exceptions
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Creating Files
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Writing To Files
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Reading from Files
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Try with Resources
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Intro
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Your first class
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Setters
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Getters
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Constructors
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Default Constructors
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Multiple Contructors
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ToString
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The Inside Constructors
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The This Keyword
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Everything in Java is an Object
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@Override
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Comparing Objects with ==
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Comparing Obects with .equals
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Generating Equals method
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Equals Explained
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Generating Code
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Person and Cats Example
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POJOS
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Java Bean
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Exercise
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Exercise Solution
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Static Keyword
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When to use Static
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Static Initlaization Block
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Instance Block Initializer
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Static Import
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Intro
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Packages
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Models
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Service Classes
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Data Access Object
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Connecting DAO and Service
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N Tier Architecture
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Utitlity Classes
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Intro
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The first CLI project task
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Demo
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Upcoming Section Intro
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Encapsulation
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Encapsulation in Action
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The Problem With Non Private Fields
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Data Hiding
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String Class Encapsulation Example
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What is Inheritance
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Implementing Inheritance
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Create an instance of Programmer
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Super Keyword
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Protected Access Modifier
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Override
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Single and Multi Level Inheritance
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Abstract Keyword on Classes
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Abstract Methods
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A Quick Word Before we move on
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Abstract Classes Example
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What is Polymorphism
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Car Bicycle Electric Scooter Example
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Create Your First Interface
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Implementing Interfaces
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Putting it all together
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Constants
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Default Methods
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CLI Project Exercise
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Don't Do This
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Dependecy Injection
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Dependency Injection In Action
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Singletons and @Inject_@Autowire
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CLI Project Exercise
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SOLID Principles
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Single Responsibitiy
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Open Close
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Liskov
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Interface Segragation
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Dependecy Inversion
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Null Pointer Exception
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The Wrong Way Of Dealing with Null
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Optionals
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Intro
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Overview
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Arrays
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Working With Arrays
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2D Arrays
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Working with 2D Arrays
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Lists
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Working With Lists and ArrayList
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Stack
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Working With Stacks
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Queue
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Working With Queues
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Linked List
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Working with LinkedList
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Sets
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Working with Sets
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Map Interface Hierarchy
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Maps
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Working With Maps
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HashCode
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Working HashCode and HashFunction
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Outro
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HackerRank Big Notation
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CLI Project Exercise
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Intro
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Class Cast Exception
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ClassCastException Example 2
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Type Parameter and Type Argument
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Generic Type Naming Convention
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Generic and Classes
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Generic and Classes Part 2
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Generics and Methods
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Bounded Type Parameters
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Multiple Bounds
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Unbounded Wildcard
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Upper Bounded Wildcards
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Lower Bounded Wildcards
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Difference Between Bounded Type Parameters and Wildcards
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Type Erasure
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Outro
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Intro
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Java Streams
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How Streams Work
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Getting Started With Streams
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Exercise
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Declarative Solution
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Imperative Solution
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Visualise Streams
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Outro
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CLI Exercise
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Maven
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Installing Maven
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Verifying Maven Installation
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Creating a Maven Project
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Maven Folder Structure
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Project Object Model (pom.xml)
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Target Folder
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Installing Maven Dependencies
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Using Java Faker
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.m2 Folder
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Maven Lifecycles
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Running Maven Commands
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Packaging and Jar Files
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CLI Project Exercise
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Intro
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JUnit
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Installing JUNIT
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Launching Your First Test
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Calculator and CalculatorTest Classes
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Writing Your First Unit Test
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Assertions
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Test Scenarios
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Other JUnit Features
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CLI Exercise
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Section Intro
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Intro Spring Boot
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Spring Initializr
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Open the project with IntelliJ
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The pom.xml
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Cleanup Few Things
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JDK
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Your first Spring Boot Application
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Embedded Web Serve
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Configuring Embedded Web Server
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Your first API
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@SpringBootApplication
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Spring Web MVC
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JSON For Java
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Java Objects to JSON Objects
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Introduction to HTTP
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The Evolution of HTTP
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HTTP Request and Response Messages
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HTTP Methods
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HTTP Status Codes
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URL
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API and REST API
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Public APIs and Other Types
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Why build APIs
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Chrome Developer Tools
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Exploring XHR for our API
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Inspecting Instagram Network Activity
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REST Client & Postman
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IntelliJ REST Clients
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CRUD and Section Overview
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Customer Model
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Fake Database
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API Endpoint
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@PathVariable
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N Tier Architecture
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Refactor - Controller Service and DAO
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@RestController @Service @Repository @Component
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Application Context
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Inspecting beans
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Bean Scopes
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Creating Beans
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We are not handling error the right way
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Custom Exception
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@ResponseStatus
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Include error Message to Responses
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Section Intro
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Postgres and Docker
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Verifying Docker Installation
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Postgres DB with Docker compose
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Connecting to Database
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Connecting to DB using IntelliJ IDEA
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Data Source & JPA
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Installing PostgreSQL Driver and Spring Data JPA Dependencies
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Configuring Datasource Properties
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Create Customer Table
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Entity
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Inspecting The Database
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Column Contraints
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CustomerRepository
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CustomerJPADataAccessService class
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@Qualifier
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Saving Entities
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Exploring JPA Methods
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The Problem
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Exercise Solution
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Intro
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Chasing Interface
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Override insert customer
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Business Logic for Adding new Customer
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Controller @RequestMapping and @RequestBody
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Testing POST Request
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Exercise
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Exercise Solution
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Exercise
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Exercise Solution
