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๐Ÿ“ฆ Java Wrapper Classes & Autoboxing โ€” Gift Wrapping & Packaging Store! ๐ŸŽ๐Ÿ“ฆ

โฌ…๏ธ Previous: Exception Handling | ๐Ÿ  INDEX | โžก๏ธ Next: Classes & Objects

Overview
๐ŸŒŸ

๐Ÿ“ฆ Java Wrapper Classes & Autoboxing โ€” Gift Wrapping & Packaging Store! ๐ŸŽ๐Ÿ“ฆ โ€” Quick Facts

๐Ÿ“Œ

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

Topic 1
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐ŸŽ Real-World Analogy: Gift Wrapping & Packaging Store ๐ŸŽ๐Ÿ“ฆ

๐Ÿ“š Wrapper classes ek gift wrapping store hai โ€” saadi cheez (primitive) ko sundar packagingโ€ฆ
Topic 2
๐Ÿ’ก ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ 1. Wrapper Classes โ€” Packaging Counter ๐Ÿ“ฆ

๐Ÿ’ก `mermaid graph LR A["Primitives"] --> B["byte โ†’ Byte"] A --> C["short โ†’ Short"] A -->โ€ฆ
Topic 3
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 2. Autoboxing & Unboxing โ€” Auto-Wrap Machine ๐ŸŽ

๐ŸŽฏ `mermaid graph LR A["int 42"] -- "Autoboxing" --> B["Integer 42"] B -- "Unboxing" -->โ€ฆ
Topic 4
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 3. Parsing โ€” Label Reading Machine ๐Ÿท๏ธ

โญ `java public class Parsing { public static void main(String[] args) { // ๐Ÿท๏ธ String โ†’โ€ฆ
Topic 5
โœจ

๐Ÿ“Œ 4. Integer Cache โ€” Display Shelf (-128 to 127) ๐Ÿ—„๏ธ

๐Ÿ”‘ `java public class IntegerCache { public static void main(String[] args) { // โš ๏ธโ€ฆ
Topic 6
โœจ

๐Ÿ“Œ 5. Useful Wrapper Methods โ€” Toolkit ๐Ÿ”ง

โœจ `java public class WrapperMethods { public static void main(String[] args) { // ===โ€ฆ
Topic 7
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 6. Null Handling โ€” Empty Box Trap โš ๏ธ

๐ŸŒŸ `java public class NullTrap { public static void main(String[] args) { // โš ๏ธ Unboxingโ€ฆ
Topic 8
โœจ

๐Ÿ“Œ 7. Performance โ€” Packaging Speed Test โฑ๏ธ

๐Ÿš€ `java public class WrapperPerformance { public static void main(String[] args) { // โŒ BADโ€ฆ
Topic 9
โœจ

โŒ Common Mistakes (Galti Chart)

๐Ÿ“š | # | Galat โŒ | Sahi โœ… | Kyun? | |---|---------|--------|-------| | 1 | == se wrapperโ€ฆ
Topic 10
โœจ

๐Ÿงช Exercises

๐Ÿ’ก

User se String input lo

๐Ÿ”‘

parseInt, parseDouble,โ€ฆ

โšก

NumberFormatException handle karo

๐ŸŽฏ

Conversion results print karo

Topic 11
๐Ÿ”’

โœ… Summary Table

๐ŸŽฏ | Topic | Key Point | |-------|-----------| | Wrapper classes | 8 primitive โ†’ objectโ€ฆ
Diagram
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

Visual Flow

๐Ÿ“Š Diagram visualization โ€” details in narration
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

๐Ÿ“ฆ Java Wrapper Classes & Autoboxing โ€” Gift Wrapping & Packaging Store! ๐ŸŽ๐Ÿ“ฆ ka sabse sahi definition kya hai?

Complete! ๐ŸŽ‰
COMPLETE

๐Ÿ“ฆ Java Wrapper Classes & Autoboxing โ€” Gift Wrapping & Packaging Store! ๐ŸŽ๐Ÿ“ฆ Complete!

Aliens School ยท HIEN ยท Cinematic Knowledge

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