{"repo":"Ahmedabdelaziz77/JAVA_NOTES","free":true,"listed":false,"github":"https://github.com/Ahmedabdelaziz77/JAVA_NOTES","clone":"git clone https://github.com/Ahmedabdelaziz77/JAVA_NOTES.git","description":"my java notes while learning (notes organized by chatgpt 5.2)","language":null,"stars":11,"topics":["clean-code","io-streams","java-design-patterns","java-functional-programming","java-notes","java-roadmap","jdbc-dao","jpa-hibernate","jsp-servlet-jstl","logging"],"license":null,"category":"productivity","readme_excerpt":"📘 Java Notes (Obsidian → GitHub) This repository contains my personal Java knowledge base organized by chatgpt 5.2, originally maintained in Obsidian and organized here for long‑term reference, revision, and interview preparation. The repo is intentionally simple: All notes live under the JAVA directory, grouped by topic , concept , and framework . --- 📂 Repository Index 🔹 JAVA A complete Java ecosystem reference covering core language, JVM, collections, concurrency, frameworks, security, testing, and best practices. --- 🗂️ JAVA Folder Index 1️⃣ Collections Purpose: Master Java Collections Framework, internals, performance, and comparisons. Topics: - Collection Interface & hierarchy - List, Set, Map implementations - Internal mechanics (HashMap, TreeMap, collisions) - Iterators & immutability - Sorting & comparators Files: - ArrayList vs Vector vs CopyOnWriteArrayList vs Stack - Collection Interface - Collections Diagram - Collections vs Arrays - Comparable vs Comparator - HashMap & Sorting - Internal Mechanics of Map, Set, HashMap, Search & Collisions - Iterators - JEP 431 – Sequenced Collections - LinkedHashMap vs HashMap - Map - Marker Interface - Queue vs Deque - Set - TreeMap Internals - Unmodifiable Lists --- 2️⃣ Date & Time in JDK Purpose: Understand legacy and modern Java date/time APIs. Files: - Date & Calendar & GMT & UTC - Time Package (java.time) --- 3️⃣ Design Patterns Purpose: Learn object‑oriented design patterns and real‑world usage. Web App Design Pattern","default_branch":null,"files":null,"tree":[],"storefront":"/r/Ahmedabdelaziz77","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/Ahmedabdelaziz77/JAVA_NOTES/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}