Week 4: Java Collections, Streams, and Advanced Features

Welcome to the Week 4 repository of our Java learning series. This week was dedicated to mastering *Java Generics, **Collections Framework, **IO Streams, **Exception Handling, **Regular Expressions, **JUnit Testing, and *Java 8 Features. These topics are essential for writing professional and scalable Java applications.

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📅 Schedule & Submissions

Day	Topic	Status	Submission Title	Notes
01	Java Generics	✅ Completed	01 - Submission of Java Generics	No due date
02	Java Collections Framework	✅ Completed	02 - Submission of Collections	No due date
03	Java IO Streams	✅ Completed	03 - Submission of Java IO Streams	No due date
04	Exception Handling	✅ Completed	04 - Submission of Exceptions	No due date
05	Regex and JUnit Testing	✅ Completed	05 - Submission of Regex & JUnit	No due date
06	Java 8 Features	✅ Completed	06 - Submission of Java 8 Features	No due date

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📚 Table of Contents

• Overview
• Topics Covered
  • Day 1: Java Generics
  • Day 2: Java Collections
  • Day 3: Java IO Streams
  • Day 4: Exception Handling
  • Day 5: Regex & JUnit Testing
  • Day 6: Java 8 Features
• How to Use This Repository

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📝 Overview

Week 4 provided deeper insights into core and advanced Java features, including working with data using collections, handling input/output streams, implementing robust exception handling, writing testable code using JUnit, and applying modern programming paradigms introduced in Java 8.

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🧠 Topics Covered

Day 1: Java Generics

• Introduction to Generics
• Generic classes and methods
• Bounded type parameters
• Benefits of using Generics

Day 2: Java Collections

• Overview of the Collections Framework
• List, Set, Map interfaces and their implementations (ArrayList, HashSet, HashMap)
• Iterators and enhanced for-loops
• Sorting and searching in collections

Day 3: Java IO Streams

• Byte and character streams
• InputStream, OutputStream, Reader, and Writer
• Buffered IO
• File handling and serialization

Day 4: Exception Handling

• Types of exceptions: checked and unchecked
• try, catch, finally, throw, and throws
• Custom exceptions
• Best practices in exception handling

Day 5: Regex & JUnit Testing

• Introduction to Regular Expressions in Java
• Pattern matching with Pattern and Matcher classes
• Unit testing basics using JUnit
• Writing test cases and assertions

Day 6: Java 8 Features

• Lambda expressions
• Functional interfaces
• Streams API
• Method references
• Optional class

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🚀 How to Use This Repository

Each topic has a dedicated folder with:

• Code examples
• Practice problems
• Lab or assignment submissions
• Supporting documentation or summaries

You can explore each folder by topic or clone the repository to experiment with the examples in your local IDE.

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Happy Exploring! 🌟