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Премиум
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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