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โš–๏ธ Java Interfaces โ€” Legal Contract & Law System! ๐Ÿ“œโš–๏ธ

โฌ…๏ธ Previous: Abstraction | ๐Ÿ  INDEX | โžก๏ธ Next: Inner Classes

Overview
๐ŸŒŸ

โš–๏ธ Java Interfaces โ€” Legal Contract & Law System! ๐Ÿ“œโš–๏ธ โ€” Quick Facts

๐Ÿ“Œ

[๐Ÿ  INDEX](./00_INDEX.md): โžก๏ธ Next: Inner Classes

Topic 1
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

โš–๏ธ Real-World Analogy: Legal Contract & Law System ๐Ÿ“œโš–๏ธ

๐Ÿ“š Interface ek legal contract hai โ€” "ye capabilities honi chahiye" define karta hai,โ€ฆ
Topic 2
๐Ÿ’ก

๐Ÿ“Œ 1. Interface Basics โ€” Contract Sign ๐Ÿ“œ

๐Ÿ’ก `mermaid graph TD A["๐Ÿ“œ Flyable<br>fly()<br>getMaxAltitude()"] --> B["๐Ÿฆ† Duck<br>fly()โ€ฆ
Topic 3
๐Ÿ”’

๐Ÿ“Œ 2. Interface Constants & Rules โš–๏ธ

๐ŸŽฏ `java interface AppConstants { // Interface fields automatically: public static finalโ€ฆ
Topic 4
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 3. Default Methods (Java 8+) โ€” Standard Clause ๐Ÿ“‹

โญ `java interface Collection2 { int size(); // Default method โ€” backward compatible:โ€ฆ
Topic 5
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 4. Static & Private Methods โ€” Utility Laws ๐Ÿ”ง

๐Ÿ”‘ `java interface StringUtils { // Static method โ€” interface se directly call: staticโ€ฆ
Topic 6
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ 5. Interface Inheritance โ€” Contract Chain ๐Ÿ”—

โœจ `java // Interface extends interface(s): interface Readable { String read(); } interfaceโ€ฆ
Topic 7
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 6. Functional Interface & Lambda โ€” Single Obligation ๐ŸŽฏ

๐ŸŒŸ `java // ๐ŸŽฏ Functional interface โ€” sirf 1 abstract method: @FunctionalInterface interfaceโ€ฆ
Topic 8
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 7. Built-in Functional Interfaces ๐Ÿ“ฆ

๐Ÿš€ `java import java.util.function.*; public class BuiltInFunctional { public static voidโ€ฆ
Topic 9
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 8. Strategy Pattern โ€” Swappable Contracts ๐Ÿ”„

๐Ÿ“š `java // Strategy interface: interface SortStrategy { void sort(int[] array); Stringโ€ฆ
Topic 10
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

โŒ Common Mistakes (Galti Chart)

๐Ÿ’ก | # | Galat โŒ | Sahi โœ… | Kyun? | |---|---------|--------|-------| | 1 | Interface meโ€ฆ
Topic 11
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿงช Exercises

๐Ÿ’ก

Drawable interface: draw(),โ€ฆ

๐Ÿ”‘

Measurable interface: area(),โ€ฆ

โšก

Circle, Rectangle implementing both

๐ŸŽฏ

Polymorphic array iteration

Topic 12
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

โœ… Summary Table

โญ | Topic | Key Point | |-------|-----------| | Interface | Pure contract, implementsโ€ฆ
Diagram
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

Visual Flow

๐Ÿ“Š Diagram visualization โ€” details in narration
Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 1

โš–๏ธ Java Interfaces โ€” Legal Contract & Law System! ๐Ÿ“œโš–๏ธ ka sabse sahi definition kya hai?

Complete! ๐ŸŽ‰
COMPLETE

โš–๏ธ Java Interfaces โ€” Legal Contract & Law System! ๐Ÿ“œโš–๏ธ Complete!

Aliens School ยท HIEN ยท Cinematic Knowledge

โœ…

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