Modern Java: From Fundamentals to Advanced Architecture

Solution: Username Availability Checker

Explore how to build a username availability checker by reading usernames into a HashSet from a file to eliminate duplicates and efficiently verify availability using Collections methods.

We'll cover the following...

Solution explanation

1.The Java Mindset

2.Variables, Types, and Operators

3.Control Flow and Methods

4.Classes and Objects

5.Inheritance and Polymorphism

6.Strings and Arrays

Mini Project

7.Advanced OOP Features

8.Exception Handling

9.File and Data I/O

10.Collections Framework

11.Generics and Type Safety

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12.Functional Programming in Java

13.Threads and Concurrency

14.Modern Concurrency Tools

15.Reflection and Metadata

16.Testing, Logging, and Build Tools

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17.Wrapping Up

18.Appendix

Solution: Username Availability Checker