Skill Topic · Cinematic

📮 Java Generics — Post Office aur Parcel Sorting System! 📦📮

⬅️ Previous: Inner Classes | 🏠 INDEX | ➡️ Next: Collections Framework

Overview

📮 Java Generics — Post Office aur Parcel Sorting System! 📦📮 — Quick Facts

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[🏠 INDEX](./00_INDEX.md): ➡️ Next: Collections Framework

Topic 1

📮 Real-World Analogy: Post Office aur Parcel Sorting System 📦📮

📚 Generics ek Post Office hai — parcels ko type ke hisaab se sort karta hai, galat parcel…

Topic 2

📌 1. Generics Kya Hai? — Smart Sorting 🎯

💡 `mermaid graph LR A["📮 Without Generics<br>List (Object)<br>Kuch bhi daalo"]…

Topic 3

📌 2. Generic Class — Labeled Mailbox 📬

🎯 `java // 📬 Generic class — T = Type parameter (parcel ka label): class Box<T> { private T…

Topic 4

📌 3. Generic Methods — Universal Sorter 🔄

⭐ `java import java.util.Arrays; import java.util.List; public class GenericMethods { // 🔄…

Topic 5

📌 4. Bounded Type Parameters — Restricted Zone 🏷️

🔑 `java // 🏷️ Upper bound — T must be Number ya uske subclass: class NumberBox<T extends…

Topic 6

📌 5. Wildcards (`?`) — Flexible Counters ❓

✨ `java import java.util.List; import java.util.ArrayList; public class Wildcards { // ❓…

Topic 7

📌 6. Generic Interface & Implementation — Repository Pattern 🗃️

🌟 `java import java.util.ArrayList; import java.util.List; // 🗃️ Generic interface — entity…

Topic 8

📌 7. Type Erasure — Label Hatao Delivery Ke Baad 🗑️

🚀 `java import java.util.ArrayList; import java.util.List; public class TypeErasure {…

Topic 9

❌ Common Mistakes (Galti Chart)

📚 | # | Galat ❌ | Sahi ✅ | Kyun? | |---|---------|--------|-------| | 1 | Raw type use…

Topic 10

🧪 Practice Exercises

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GenericStack<T> class with push(),…

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Internal array ya LinkedList use

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String, Integer, Double testcases

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EmptyStackException handle karo

Topic 11

✅ Summary Table

🎯 | Topic | Key Point | |:-----:|:---------:| | Generics | <T> type parameter —…

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quick Quiz

Quiz — Question 1

📮 Java Generics — Post Office aur Parcel Sorting System! 📦📮 ka sabse sahi definition kya hai?

Complete! 🎉

📮 Java Generics — Post Office aur Parcel Sorting System! 📦📮 Complete!

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