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NMD Java Backend
09. Recursion
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NMD Java Backend
Home
Java
Java
Environment Setup
Environment Setup
Overview
Install JDK 21
Install IDE
Terminal Basics
Git and GitHub
Maven and Hello World
Java Fundamentals
Java Fundamentals
Overview
JVM — How it works
Variables & Data Types
Operators
Control Flow — if / else / switch
Loops — for / while / do-while / for-each
Arrays — 1D & 2D
String and StringBuilder
Methods and Pass-by-value
Enum
File I/O
OOP — Class and Object
Encapsulation and Constructor
Inheritance
Polymorphism
Abstract Class
Records
Interface
instanceof and Type Casting
Exercises
Exercises
Overview
Phase 1 — Language Fundamentals
Phase 1 — Language Fundamentals
Overview
01. Variables, Data Types, Operators
02. Conditionals
03. Loops
04. Methods
05. String
Phase 2 — Programming Thinking
Phase 2 — Programming Thinking
Overview
06. Array & Two Pointers
07. HashMap & HashSet
08. Stack & Queue
09. Recursion
Phase 3 — Core Algorithms
Phase 3 — Core Algorithms
Overview
10. Sorting & Binary Search
11. Sliding Window
12. Linked List
13. Tree & Graph Basics
Phase 4 — Java Advanced
Phase 4 — Java Advanced
Overview
14. OOP
15. Collections Framework
16. Stream API & Lambda
17. Exception & DateTime
18. Concurrency
09. Recursion
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