docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
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+---
+id: java-this-keyword
+title: "Java This Keyword"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["this keyword", "자바 this"]
+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", "oop", "this"]
+raw_sources: ["https://www.w3schools.com/java/java_this.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java This Keyword]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Without `this`, writing `x = x;` inside a constructor whose parameter shadows the class field would silently assign the parameter to itself, leaving the actual class variable uninitialized at 0 — `this.x = x;` is the only way to disambiguate which `x` is meant when names collide. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`this`** — refers to the current object inside a method or constructor. [S1]
+- **Name-shadowing scenario** — when a parameter has the same name as a class attribute, the parameter temporarily hides the class variable within that scope. [S1]
+- **`this.x = x;`** — assigns the parameter's value to the class attribute, resolving the shadow. [S1]
+- **`this(...)`** — calls another constructor in the same class; must be the FIRST statement in the calling constructor. [S1]
+- **Constructor chaining use case** — providing default values or reusing initialization code instead of repeating it. [S1]
+
+## 📖 세부 내용 (Details)
+- Shadow resolution: `public Main(int x) { this.x = x; }` — without `this`, `x = x;` would leave the class variable at its default 0. [S1]
+- Constructor chaining: `public Main(String modelName) { this(2020, modelName); } public Main(int modelYear, String modelName) { this.modelYear = modelYear; this.modelName = modelName; }` — calling `new Main("Corvette")` yields `2020 Corvette` via the default-year chain. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **this() 호출 위치 제약**: 생성자 내에서 this()를 호출할 경우 반드시 첫 번째 문장이어야 한다는 점이 명시됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 기본값(2020년형)을 제공하는 생성자 체이닝은 초기화 코드 중복을 피하는 표준 패턴이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Constructor chaining with this() for default values (Java):
+```java
+public class Main {
+    int modelYear;
+    String modelName;
+    public Main(String modelName) {
+        this(2020, modelName); // must be first statement
+    }
+    public Main(int modelYear, String modelName) {
+        this.modelYear = modelYear;
+        this.modelName = modelName;
+    }
+}
+```
+
+## ✅ 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 Constructors]], [[Java Modifiers]]
+- **참조 맥락:** 이름 충돌 해소 및 생성자 체이닝 — Modifiers 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java this — https://www.w3schools.com/java/java_this.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java this Keyword" page (Astra wiki-curation, P-Reinforce v3.1 format).