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-non-access-modifiers
+title: "Java Non Access Modifiers"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["non-access modifiers", "자바 비접근 제어자"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["java", "programming", "w3schools", "oop", "modifiers", "static", "abstract", "final"]
+raw_sources: ["https://www.w3schools.com/java/java_non_modifiers.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Non Access Modifiers]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`static` methods "cannot use variables or methods that belong to an object" — this is the key limitation that separates them from instance methods, and it directly explains why `main()` (always static) needs an object to call any instance method inside it. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Non-access modifiers** — don't control visibility, but add other features; most common: `final`, `static`, `abstract`. [S1]
+- **`final`** — prevents attribute values from being overridden. [S1]
+- **`static`** — belongs to the class itself; callable without creating an object; shared across all instances; CANNOT access object-specific (instance) members. [S1]
+- **`abstract`** — an abstract method has no body; the body is provided by a subclass; only valid inside an abstract class. [S1]
+- **Class-level list** — for classes: `final` (cannot be inherited) or `abstract` (cannot instantiate directly). [S1]
+- **Member-level list** — `final`, `static`, `abstract`, `transient` (skipped during serialization), `synchronized` (one-thread-at-a-time access), `volatile` (always read from main memory, no thread-local caching). [S1]
+
+## 📖 세부 내용 (Details)
+- Final attributes: `final int x = 10; final double PI = 3.14; ... myObj.x = 50; // Error`. [S1]
+- Static method call without object: `static void myStaticMethod() {...} ... myStaticMethod(); Main.myStaticMethod();`. [S1]
+- Abstract class/method: `abstract class Main { public abstract void study(); } class Student extends Main { public void study() { System.out.println("Studying all day long"); } }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **static의 제약**: 클래스 자체에 속하므로 객체 없이 호출 가능하지만, 객체에 속한 변수/메서드는 사용할 수 없다는 점이 명시됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — abstract 클래스/메서드는 상속(Inheritance)/추상화(Abstraction) 챕터에서 본격적으로 다뤄지는 개념의 예고편이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Abstract class with subclass providing the method body (Java):
+```java
+abstract class Main {
+    public abstract void study(); // no body
+}
+class Student extends Main {
+    public void study() {
+        System.out.println("Studying all day long");
+    }
+}
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Java Tutorial]]
+- **관련 개념:** [[Java Modifiers]], [[Java Inheritance]], [[Java Abstraction]], [[Java Constants Final]]
+- **참조 맥락:** static/abstract/final의 기초 — 상속/추상화 챕터에서 심화.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Non-Access Modifiers — https://www.w3schools.com/java/java_non_modifiers.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Non-Access Modifiers" page (Astra wiki-curation, P-Reinforce v3.1 format).