---
id: java-else-if
title: "Java Else If"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["else if statement", "자바 else if"]
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", "conditions", "else-if"]
raw_sources: ["https://www.w3schools.com/java/java_conditions_elseif.asp"]
applied_in: []
github_commit: ""
---

# [[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):
```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).