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.
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---
id: java-modifiers
title: "Java Modifiers"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["access modifiers", "자바 접근 제어자"]
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", "modifiers", "access-control"]
raw_sources: ["https://www.w3schools.com/java/java_modifiers.asp"]
applied_in: []
github_commit: ""
---
# [[Java Modifiers]]
## 🎯 한 줄 통찰 (One-line insight)
Classes only get two access modifier choices (`public`/default), while attributes/methods/constructors get four (`public`/`private`/default/`protected`) — the extra granularity for members exists because access control needs to operate at a finer level than whole-class visibility. [S1]
## 🧠 핵심 개념 (Core concepts)
- **Access modifier** — controls the access level of classes, attributes, methods, constructors. [S1]
- **For classes** — `public` (accessible by any class) or `default` (package-only, used when no modifier is specified). [S1]
- **For members (attributes/methods/constructors)** — `public`, `private` (class-only), `default` (package-only), `protected` (package + subclasses). [S1]
- **Real-life analogy** — public = public park (anyone enters); private = house key (only you). [S1]
## 📖 세부 내용 (Details)
- Public vs. private: `class Person { public String name = "John"; private int age = 30; } ... p.name // works; p.age // Error: age has private access in Person`. [S1]
## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.
## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — public/private 분리는 캡슐화(Encapsulation) 챕터의 직접적 기반이다. [S1]
## 💻 코드 패턴 (Code patterns)
Public vs. private attribute access (Java):
```java
class Person {
public String name = "John"; // accessible everywhere
private int age = 30; // only accessible inside this class
}
```
## ✅ 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 Non Access Modifiers]], [[Java Encapsulation]], [[Java Packages]], [[Java Inheritance]]
- **참조 맥락:** 접근 제어자의 기초 — 캡슐화/패키지/상속 챕터로 확장.
## 📚 출처 (Sources)
- [S1] W3Schools — Java Modifiers — https://www.w3schools.com/java/java_modifiers.asp
## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "Java Modifiers" page (Astra wiki-curation, P-Reinforce v3.1 format).