docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

10_Wiki/Topic_Programming/Topic_Java/Java_Variables.md

@@ -0,0 +1,77 @@
+---
+id: java-variables
+title: "Java Variables"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["자바 변수"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["java", "programming", "w3schools", "variables"]
+raw_sources: ["https://www.w3schools.com/java/java_variables.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Variables]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Unlike Python, Java is statically typed — every variable declaration must state a type (`type variableName = value;`), and that type cannot silently change later the way Python's dynamic typing allows. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Basic types** — `String` (text, double-quoted), `int` (whole numbers), `float` (decimals), `char` (single character, single-quoted), `boolean` (true/false). [S1]
+- **Declaration syntax** — `type variableName = value;`. [S1]
+- **Declare-then-assign** — `int myNum; myNum = 15;` is also valid, splitting declaration and assignment. [S1]
+- **Reassignment overwrites** — assigning a new value replaces the old one. [S1]
+- **`final` keyword** — makes a variable unchangeable/read-only; reassigning raises a compile error. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Static typing is the core Java/Python divergence** — every Java variable's type is fixed at declaration and enforced by the compiler, unlike Python where `x = 4; x = "Sally"` is legal. [S1]
+
+## 📖 세부 내용 (Details)
+- String declaration: `String name = "John"; System.out.println(name);`. [S1]
+- Int declaration: `int myNum = 15;`. [S1]
+- Separate declare/assign: `int myNum; myNum = 15;`. [S1]
+- Reassignment: `int myNum = 15; myNum = 20;`. [S1]
+- final (immutable): `final int myNum = 15; myNum = 20; // error`. [S1]
+- All basic types together: `int myNum = 5; float myFloatNum = 5.99f; char myLetter = 'D'; boolean myBool = true; String myText = "Hello";`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 이후 Data Types 챕터에서 각 타입이 상세히 다뤄진다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Five basic types declared (Java):
+```java
+int myNum = 5;
+float myFloatNum = 5.99f;
+char myLetter = 'D';
+boolean myBool = true;
+String myText = "Hello";
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.90
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Java Tutorial]]
+- **관련 개념:** [[Java Data Types]], [[Java Constants Final]], [[Python Variables]]
+- **참조 맥락:** 정적 타이핑이라는 Java의 핵심 특성 — Python의 동적 타이핑과 대비.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Variables — https://www.w3schools.com/java/java_variables.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Variables" page (Astra wiki-curation, P-Reinforce v3.1 format).