2nd/10_Wiki/Dev/Topic_Java/Java_List.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-list	Java List	Programming_Language	draft	conceptual		List interface 자바 리스트		B	0.88	2026-07-04	2026-07-04			java programming w3schools collections-framework list	https://www.w3schools.com/java/java_list.asp

Java List

🎯 한 줄 통찰 (One-line insight)

List is an interface, so new List<String>() is impossible — you must always instantiate a CONCRETE implementer like ArrayList or LinkedList, a distinction that mirrors the abstract-class rule from the OOP section (cannot instantiate the abstraction itself). [S1]

🧠 핵심 개념 (Core concepts)

• List interface — ordered collection; supports index access, duplicates, and preserves insertion order. [S1]
• Cannot instantiate directly — must use an implementing class: ArrayList (resizable array, fast random access) or LinkedList (linked container chain, easy insert/remove). [S1]
• Common methods — add(), get(), set(), remove(), size(). [S1]
• List vs. plain array — array is fixed-size and not part of the Collections Framework; List implementations are dynamic-size and part of the framework. [S1]

📖 세부 내용 (Details)

• Method table: add() (append), get() (read by index), set() (replace by index), remove() (delete by index), size() (count). [S1]
• Comparison table: Array (fixed size, faster raw performance, not in Collections Framework) vs. List (dynamic size, more flexible/feature-rich, part of Collections Framework). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 순서와 중복을 허용해야 하는 데이터 저장에 List 인터페이스가 표준적으로 쓰인다. [S1]

💻 코드 패턴 (Code patterns)

해당 챕터는 개념/메서드표 중심으로 별도 실행 코드 예제가 없음 — 다음 챕터(Java ArrayList)에서 List 구현체 실습이 시작된다.

✅ 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 Collections, Java ArrayList, Java LinkedList
• 참조 맥락: List 인터페이스의 기초 — ArrayList/LinkedList 구현체 챕터로 직접 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — Java List Interface — https://www.w3schools.com/java/java_list.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "Java List Interface" page (Astra wiki-curation, P-Reinforce v3.1 format).