Java Collections and Streams

The Java Collection Framework is a unified architecture for representing and manipulating collections of objects. It provides a set of interfaces and classes to store, retrieve, manipulate, and communicate aggregate data focused on Collections, Streams, Generics, Exception Handling, Regular Expressions, and Annotations.

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📚 Branches Overview

Branch Name	Topics Covered	Code Solutions
java-generics	Introduction to Generics, Type Parameters, Generic Classes and Methods, Bounded Types, Wildcards	Implementations showing type-safe reusable code using generics
java-collections	Collections Framework Overview, Lists, Sets, Queues, Deques, Maps, Interface Hierarchy, Best Practices	Practical use cases and comparisons of different collection types
java8-features	Functional Interfaces, Lambda Expressions, Stream API	Stream processing examples, lambda usage, and functional programming patterns
exception-handling	Exception types, Checked vs Unchecked Exceptions, Custom Exceptions, try-catch-finally, try-with-resources, throws, throw	Robust error handling strategies with custom exception demos
regex-patterns	Regex basics, Metacharacters, Quantifiers, Password Strength, Phone Number Validation, Java Regex API usage	Real-world regex examples and utilities using Pattern and Matcher classes
java-annotations	Built-in annotations, Creating and processing custom annotations, Advanced use cases	Annotation creation, usage, and processing tools with practical examples

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🔍 Detailed Branch Descriptions

1. java-generics

Generics enable types (classes and methods) to operate on objects of various types while providing compile-time type safety.

• Understand generic classes and methods to avoid code duplication.
• Learn bounded type parameters for restricting types.
• Explore wildcards for flexibility in method parameters and return types.

2. java-collections

Dive into Java’s powerful Collections Framework that provides data structures and algorithms.

• Get familiar with Lists, Sets, Queues, and Maps.
• Understand interface hierarchies and implementations like ArrayList, LinkedList, HashSet, TreeSet, HashMap, and TreeMap.
• Learn best practices to choose the right collection for your use case.

3. java8-features

Master modern Java programming paradigms introduced in Java 8.

• Explore functional interfaces and their roles in lambda expressions.
• Use Lambda expressions to write concise and readable code.
• Leverage the Stream API for efficient collection processing with map, filter, reduce, and more.

4. exception-handling

Handle errors gracefully using Java’s exception mechanisms.

• Differentiate between checked and unchecked exceptions.
• Create and throw custom exceptions for business-specific error handling.
• Use advanced try-catch-finally patterns including try-with-resources to manage resources.

5. regex-patterns

Harness the power of regular expressions to validate and manipulate strings.

• Understand regex syntax including metacharacters and quantifiers.
• Implement practical validations like password strength checks and phone number formats.
• Use Java’s Pattern and Matcher classes effectively to search, match, and replace patterns in text.

6. java-annotations

Explore Java’s metadata feature with annotations.

• Learn about common built-in annotations like @Override, @Deprecated, and @SuppressWarnings.
• Create your own custom annotations to add metadata to your code.
• Understand annotation processing and real-world use cases such as code generation and validation frameworks.

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🚀 How to Use This Repository

1. Clone the repository

   git clone https://github.com/disha2301/Java-Collections-and-Java8.git
   

2. Navigate into the directory

   cd Java-Collections-and-Streams
   

3. Switch to a branch

   git checkout <branch-name>
   

4. IDE

   Open in your favorite IDE (IntelliJ, Eclipse, VS Code) and explore the code examples.