2nd/10_Wiki/Dev/Topic_Java/Java_Modifiers.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
java-modifiers	Java Modifiers	Programming_Language	draft	conceptual		access modifiers 자바 접근 제어자		B	0.9	2026-07-04	2026-07-04			java programming w3schools oop modifiers access-control	https://www.w3schools.com/java/java_modifiers.asp

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):

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).