🚀 Java Advanced: Stream API, Lambda & Date Handling

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📌 Overview

This repository contains advanced Java programs demonstrating:

• ✔ Stream API
• ✔ Lambda Expressions
• ✔ java.time Date and Time Handling
• ✔ Functional Processing
• ✔ Real‑world data transformations & filtering

The project includes four tasks (Q1.1 – Q1.4) focused on functional-style Java development.

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📁 Project Structure

java-advanced-streams-lambda-date/
│
├── .github/
│   └── workflows/
│       └── java-build.yml
│
├── screenshots/
│   ├── 1.png
│   ├── 2.png
│   ├── 3.png
│   └── 4.png
│
├── src/
│   ├── QuestionFour.java
│   ├── QuestionOne.java
│   ├── QuestionThree.java
│   └── QuestionTwo.java
│
├── LICENSE
└── README.md

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🧠 Task Breakdown

🔹 Q1.1 — Convert Strings to Uppercase

Uses Stream API’s map() to transform all strings into uppercase.

🔹 Q1.2 — Filter Non‑Empty Strings

Uses filter(str -> !str.isEmpty()) to clean the list.

🔹 Q1.3 — Filter Students Starting with “A”

Demonstrates lambda expressions with startsWith("A").

🔹 Q1.4 — Age Calculator Using LocalDate

Parses a birthdate and computes age in years, months, days.

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🖼 Screenshots (Grid)

Q1.1	Q1.2

Q1.3	Q1.4

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▶️ How to Run

1️⃣ Clone the repo

git clone https://github.com/TheComputationalCore/java-advanced-streams-lambda-date.git

2️⃣ Navigate

cd java-advanced-streams-lambda-date

3️⃣ Compile

javac src/*.java

4️⃣ Run tasks

java src/QuestionOne      # Q1.1
java src/QuestionTwo      # Q1.2
java src/QuestionThree    # Q1.3
java src/QuestionFour     # Q1.4

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🛠 Tech Stack

• Java 17
• Stream API
• Lambda Expressions
• java.time.LocalDate
• Functional Programming Concepts

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📦 Requirements

• JDK 8+ (Java 17 Recommended)
• IDE or terminal

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🏷 Topics

java • streams • lambda • functional-programming • localdate • date-handling

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📜 License

Distributed under the MIT License.