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3.1 KiB
3.1 KiB
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 | ||||||||
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| java-operators-logical | Java Operators Logical | Programming_Language | draft | conceptual |
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B | 0.9 | 2026-07-04 | 2026-07-04 |
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Java Operators Logical
🎯 한 줄 통찰 (One-line insight)
Java's logical operators use symbolic form (&&, ||, !) rather than Python's keyword form (and, or, not) — same semantics, different syntax, a common point of confusion when switching between the two languages. [S1]
🧠 핵심 개념 (Core concepts)
&&(logical AND) — true if BOTH statements are true. [S1]||(logical OR) — true if AT LEAST ONE statement is true. [S1]!(logical NOT) — reverses the result. [S1]
🧩 추출된 패턴 (Extracted patterns)
- Access-control logic via boolean combination —
isLoggedIn && !isAdmin("regular user"),isLoggedIn || isAdmin("has access") shows how login/permission checks compose from simple booleans using logical operators. [S1]
📖 세부 내용 (Details)
- Login/access check:
boolean isLoggedIn = true; boolean isAdmin = false; System.out.println("Regular user: " + (isLoggedIn && !isAdmin)); System.out.println("Has access: " + (isLoggedIn || isAdmin));. [S1]
⚖️ 모순 및 업데이트 (Contradictions & updates)
- Python과 문법 차이: Python은
and/or/not키워드를 쓰지만 Java는&&/||/!기호를 쓴다. [S1]
🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 로그인 상태/권한 확인처럼 여러 불리언을 조합하는 실전 패턴이다. [S1]
💻 코드 패턴 (Code patterns)
Login/permission check via logical operators (Java):
boolean isLoggedIn = true;
boolean isAdmin = false;
System.out.println("Regular user: " + (isLoggedIn && !isAdmin));
System.out.println("Has access: " + (isLoggedIn || isAdmin));
✅ 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 Operators Comparison, Java If Else, Python Operators Logical
- 참조 맥락: Python의 and/or/not과 동일한 개념이지만 기호(&&/||/!)로 표기.
📚 출처 (Sources)
- [S1] W3Schools — Java Logical Operators — https://www.w3schools.com/java/java_operators_logical.asp
📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "Java Logical Operators" page (Astra wiki-curation, P-Reinforce v3.1 format).