Clean Code with Java: Learn Simple Design, Refactoring & TDD

Learn to Write Clean Code with Java. Get Hands-on with Code Examples involving 4 principles of Simple Design, Refactoring & TDD.

• Step I : Understand Clarity of Code (Unit Tests)
• Step II: Focus on 4 Principles of Simple Design
• Step III: Get started with Refactoring
• Step IV : Understand TDD

Exercises

GildedRose

• Goal
  • Understand Clarity of Code
  • Give importance to Unit Testing
• GildedRoseADefaultItemTest.java
• GildedRoseBAgedBrieTest.java
• GildedRoseCBackstagePassesTest.java
• More details - Gilded Rose Exercises

4 Principles of Simple Design

• Refactor Code
  • StudentHelper.isGradeB()
  • StudentHelper.getGrade()
  • StudentHelper.willQualifyForQuiz()
• Write Code
  • TextHelper.swapLastTwoCharacters()
  • TextHelper.truncateAInFirst2Positions()
• Refactor Unit Test
  • CustomerBOTest

Refactoring

• CustomerBOImpl.getCustomerProductsSum(List<Product>)
• Movie.isValidRating()
• MenuAccess.setAuthorizationsInEachMenus(List<MenuItem>, Role[])
• UserLoginChecker.isUserAllowedToLogin(long, String, boolean, User, List)

Try on Your Own (With Solutions)

• UserLoginCheckerTest
• MenuAccessTest

TDD

• More details - TDD Exercises
• Truncate A in first 2 positions of a String
• Check if first two and last two characters in the string are the same.
• Bowling Kata

Step By Step Details

Getting Started with Clarity in Code

• Clean Code with Simple Design, Refactoring and TDD - Getting Setup
• Step 00 - Clarity in Code - Problem 1 - Gilded Rose - Introduction
• Step 01 - Clarity in Code - Problem 1 - Gilded Rose - Refactoring Unit Test 1 - Default Item
• Step 02 - Clarity in Code - Problem 1 - Gilded Rose - Refactoring Unit Test 2 - Default Item
• Step 03 - Clarity in Code - Problem 1 - Gilded Rose - Refactoring Unit Test 3 - Aged Brie
• Step 04 - Clarity in Code - Problem 1 - Gilded Rose - Refactoring Unit Test 4 - Backstage Passes
• Step 05 - Clean Code - Attitude for the course

Getting Started with 4 Principles of Simple Design

• Step 01 - 4 Principles of Simple Design - An Introduction
• Step 02 - 4 Principles of Simple Design - Exercise - StudentHelper.isGradeB
• Step 03 - 4 Principles of Simple Design - Exercise - StudentHelper.getGrade
• Step 04 - 4 Principles of Simple Design - Exercise - StudentHelper.willQualifyForQuiz
• Step 06 - Most difficult challenge in programming - Naming
• Step 07 - 4 Principles of Simple Design - Exercise - TextHelper.swapLastTwoCharacters
• Step 07 - Should you have comments in code?
• Step 08 - 4 Principles of Simple Design - Exercise - TextHelper.truncateAInFirst2Positions
• Step 09 - 4 Principles of Simple Design - Exercise - CustomerBOTest
• Step 10 - 4 Principles of Simple Design - Exercise - CustomerBOTest
• Step 11 - Attitude towards Unit Testing
• Step 12 - Unit Testing Principles

Getting Started with Refactoring

• Step 01 - Introduction to Refactoring
• Step 02 - Refactoring - Exercise - CustomerBOImpl.getCustomerProductsSum
• Step 03 - Refactoring - Exercise - Movie.isValidRating
• Step 04 - Refactoring - Exercise - MenuAccess.setAuthorizationsInEachMenus
• Step 05 - Refactoring - Exercise - UserLoginChecker.isUserAllowedToLogin - 1
• Step 06 - Refactoring - Exercise - UserLoginChecker.isUserAllowedToLogin - 2
• Step 07 - My 10 Tips for Good Programmers

Getting Started with Test Driven Development

• Step 01 - Introduction to Test Driven Development - TDD
• Step 02 - Test Driven Development - TDD - Exercise - StringHelper.replaceAInFirst2Positions
• Step 03 - Test Driven Development - TDD - Exercise - StringHelper.replaceAInFirst2Positions
• Step 04 - Test Driven Development - TDD - Exercise - StringHelper.areFirstTwoAndLastTwoCharsTheSame
• Step 05 - Test Driven Development - TDD - Exercise - Bowling Kata - Introduction
• Step 06 - Test Driven Development - TDD - Exercise - Bowling Kata - Getting Started
• Step 07 - Test Driven Development - TDD - Exercise - Bowling Kata - Spare
• Step 08 - Test Driven Development - TDD - Exercise - Bowling Kata - Strike
• Step 09 - 3 Tips for Test Driven Development - TDD

Thank You

• Clean Code with Simple Design, Refactoring and TDD - Thank You