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.
2026-07-05 00:10:59 +09:00
parent a397bc4720
commit 1cfd3bbb56
1495 changed files with 68534 additions and 27 deletions
@@ -0,0 +1,75 @@
+---
+id: java-enums
+title: "Java Enums"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["enum keyword", "자바 열거형"]
+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", "enums"]
+raw_sources: ["https://www.w3schools.com/java/java_enums.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Enums]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Enums can have attributes and methods just like classes, but with one key restriction that defines their whole purpose — enum constants are always `public`, `static`, and `final`, meaning you can never create an object from an enum or override its values, only select from a fixed listed set. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`enum`** — a special class representing a group of unchangeable constants. [S1]
+- **Naming convention** — constants written in uppercase, comma-separated. [S1]
+- **Dot-syntax access** — `Level myVar = Level.MEDIUM;`. [S1]
+- **Enum inside a class** — enums can be nested inside a regular class. [S1]
+- **Switch compatibility** — enums work naturally as switch expressions, with case labels matching constant names (no dot prefix in case labels). [S1]
+- **`values()`** — built-in method returning an array of all enum constants, useful for looping. [S1]
+- **Constraints vs. classes** — cannot instantiate objects from an enum; cannot extend other classes (but CAN implement interfaces). [S1]
+
+## 📖 세부 내용 (Details)
+- Basic enum: `enum Level { LOW, MEDIUM, HIGH } ... Level myVar = Level.MEDIUM;`. [S1]
+- Switch on enum: `switch(myVar) { case LOW: ...; case MEDIUM: System.out.println("Medium level"); break; case HIGH: ...; }`. [S1]
+- Loop via values(): `for (Level myVar : Level.values()) { System.out.println(myVar); } // LOW MEDIUM HIGH`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **불변성 제약**: enum 상수는 public, static, final이므로 객체 생성이 불가하고 값 재정의도 불가하다는 점이 명확히 구분됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 요일, 색상, 카드 덱처럼 값이 절대 바뀌지 않는 고정 집합을 표현할 때 사용된다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Enum used in a switch statement (Java):
+```java
+enum Level { LOW, MEDIUM, HIGH }
+Level myVar = Level.MEDIUM;
+switch (myVar) {
+    case LOW: System.out.println("Low level"); break;
+    case MEDIUM: System.out.println("Medium level"); break;
+    case HIGH: System.out.println("High level"); break;
+}
+```
+
+## ✅ 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 Switch]], [[Java Enum Constructor]], [[Java Interface]]
+- **참조 맥락:** 고정 상수 집합 표현 — 생성자를 갖는 enum(Enum Constructor)으로 확장.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Enums — https://www.w3schools.com/java/java_enums.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Enums" page (Astra wiki-curation, P-Reinforce v3.1 format).