Java Advanced: Exception Handling & Collections

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🚀 Overview

This repository contains advanced Java exercises (Q1–Q5) focusing on:

• Custom Exception Handling
• Input Validation
• Java Collections Framework
• HashMap operations
• Stack implementation
• User‑driven logic & error handling

All tasks include screenshots, organized source code, and a fully automated CI workflow.

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📁 Project Structure

java-advanced-exceptions-collections/
│
├── .github/workflows/
│   └── java-build.yml
│
├── screenshots/
│   ├── 1.a.png
│   ├── 1.b.png
│   ├── 1.c.png
│   ├── 1.d.png
│   ├── 2.a.png
│   ├── 2.b.png
│   ├── 3.a.png
│   ├── 3.b.png
│   ├── 3.c.png
│   ├── 4.a.png
│   ├── 4.b.png
│   ├── 4.c.png
│   ├── 4.d.png
│   └── 5.png
│
├── src/
│   ├── AgeNotWithinRangeException.java
│   ├── NameNotValidException.java
│   ├── Student.java
│   ├── Voter.java
│   ├── QuestionThree.java
│   ├── QuestionFour.java
│   ├── QuestionFive.java
│   └── (supporting logic)
│
├── LICENSE
└── README.md

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🧠 Task Breakdown

Q1 — Student Class with Custom Exceptions

Validates:

• Age must be between 15–21
• Name must not contain numbers or special symbols

Uses two custom exceptions:

• AgeNotWithinRangeException
• NameNotValidException

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Q2 — Voter Age Validation

Ensures:

• Age ≥ 18
  Else throws Invalid Age Exception.

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Q3 — Weekday Array Handling

• Takes a day index as input
• Prints weekday name
• Handles:
  • Invalid numeric input
  • Array out‑of‑bounds cases

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Q4 — Student Grades Using HashMap

Supports:

• Add student + grade
• Remove student
• Fetch grade

Uses:

HashMap<String, Integer>

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Q5 — Stack Implementation (Collections)

Operations:

• push()
• pop()
• isEmpty()

Uses:

Stack<Integer>

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🖼️ Screenshots (Grid Layout)

Q1 — Student Management

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Q2 — Voter Age Validation

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Q3 — Weekday Array

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Q4 — HashMap Grades

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Q5 — Stack

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▶️ How to Run

Clone

git clone https://github.com/TheComputationalCore/java-advanced-exceptions-collections.git

Navigate

cd java-advanced-exceptions-collections/src

Compile Everything

javac *.java

Run Any Task

java Student          # Q1
java Voter            # Q2
java QuestionThree    # Q3
java QuestionFour     # Q4
java QuestionFive     # Q5

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📜 License

Distributed under the MIT License.

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⭐ Contribution

Feel free to open PRs, file issues, or suggest improvements!