Pukkah/codelex-java

My Notes and Exercises from CODELEX Java Course

Java pieraksti un praktiskie uzdevumi

Day01 (21.02.2022)

• Main - Scanner un System.in() pamati
• Personal Challenge: PersonalID - Personas koda pārbaude

Day02 (22.02.2022)

• GitHub access token and Git
• Main - Operators...

Exercises: Types and Variables, Arithmetic

Day03 (23.02.2022)

• Main - Casting, Control flow, loops...

• Update Branch before Pull

  If you've not pushed yet:

  • git commit -m WorkInProgress (or git stash)
  • git rebase master
  • Resolve any conflicts
  • git stash pop if you stashed

  If you have pushed already:

  • Ensure your current branch's commits are production quality
  • git stash
  • git pull (will not conflict, but will create merge commit)
  • git stash pop

Exercises: Flow-control, Loops

Day04 (25.02.2022)

• Exceptions - Catching and Throwing
• String.class - String Object and Methods
• RegularExpressions - RegEx
• Code Example: HackingTime - Example using RegEx to scrape data from webpage
• http://regexplanet.com
• http://regexr.com

Day05 (28.02.2022)

• Arrays
• Methods
• Classes , SampleClass

Exercises: Arrays

Day06 (02.03.2022)

• Packages
• Classes continued, see Classes , SampleClass
• Code Example: CurrencyConverter - Example / practice application

Exercises: Classes and Objects

Day07 (04.03.2022)

TODO

Day08 (07.03.2022)

• DateAndTime LocalTime, LocalDate , LocalDateTime , Instant, Period, Duration
• Varargs
• Lists
• Code Example: ChainAndLink -> Chain -> Link
• Exercise: POINT.md -> Point

Day09 (09.03.2022)

• Code Style...

Exercises: Date and Time

Day10 (11.03.2022)

• Basic Java Quiz - Practical test: Implement Author, so it works with AuthorTest
• Code Example: PasswordValidator - Compare strings with execution time hack protection.
• CodinGame: WavyText (my implementation)

Day11 (14.03.2022)

• Abstract Classes
• Inner Classes
• Anonymous Classes

Day12 (16.03.2022)

• Resolving Git Merge Conflicts
• Interfaces
• Termini - Polymorphism, Inheritance, Composition, Encapsulation, Abstraction
• Enums

Day13

• Exception Handling
• Annotation
• Reflection - accessing and modifying private fields

Day14 (21.03.2022)

• Collections - Set, List, Queue and Stack, Map
• Generics

Day15 (23.03.2022)

• I/O (Input/Output) Operations - java.io, java.nio
• TDD - JUnit 5

Day16 (25.03.2022)

• Functional Programming
• Stream API

Day17 (28.03.2022)

• Custom Stream Collector, see: CharacterToStringCollector
• Optionals
• Concurrency - Thread, ExecutorService & keywords - synchronized, volatile

Day18 (30.03.2022)

• Summary exercises - OOP & Generics

Day19 (01.04.2022)

• See TEST.md