2nd/10_Wiki/Dev/Topic_Java/Java_Else_If.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-else-if	Java Else If	Programming_Language	draft	conceptual		else if statement 자바 else if		B	0.9	2026-07-04	2026-07-04			java programming w3schools conditions else-if	https://www.w3schools.com/java/java_conditions_elseif.asp

Java Else If

🎯 한 줄 통찰 (One-line insight)

An else if chain short-circuits at the first true condition — later conditions are never even evaluated, so ordering matters (e.g., a time < 18 check placed before a time < 12 check would incorrectly swallow morning cases). [S1]

🧠 핵심 개념 (Core concepts)

• else if — tests a new condition only if the preceding if/else-if was false. [S1]
• Syntax — if (condition1) {...} else if (condition2) {...} else {...}. [S1]
• Chain evaluation — conditions are checked top-to-bottom; the first true one wins and the rest are skipped. [S1]

📖 세부 내용 (Details)

• Weather example: int weather = 2; if (weather == 1) {...} else if (weather == 2) { System.out.println("Wear sunglasses."); } else {...} // Outputs "Wear sunglasses.". [S1]
• Time-of-day chain: int time = 16; if (time < 12) {...} else if (time < 18) { System.out.println("Good day."); } else {...} // Outputs "Good day.". [S1]
• Falls through to final else: int time = 22; with the same chain outputs "Good evening." since neither earlier condition matches. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 셋 이상의 분기가 필요한 다중 조건 판단(시간대, 온도, 등급 등)의 표준 패턴이다. [S1]

💻 코드 패턴 (Code patterns)

Three-way branch chain (Java):

int time = 16;
if (time < 12) {
    System.out.println("Good morning.");
} else if (time < 18) {
    System.out.println("Good day.");
} else {
    System.out.println("Good evening.");
}

✅ 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 Else, Java If Shorthand, Java Switch
• 참조 맥락: 다중 조건 분기 — switch문의 대안으로 쓰임.

📚 출처 (Sources)

• [S1] W3Schools — Java Else If — https://www.w3schools.com/java/java_conditions_elseif.asp

📝 변경 이력 (Change history)

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