---
id: java-booleans
title: "Java Booleans"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["boolean expressions", "자바 불리언"]
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", "boolean", "expressions"]
raw_sources: ["https://www.w3schools.com/java/java_booleans.asp"]
applied_in: []
github_commit: ""
---

# [[Java Booleans]]

## 🎯 한 줄 통찰 (One-line insight)
A boolean expression's result can be stored in a boolean variable instead of used inline — `boolean isGreater = x > y;` — trading a bit of verbosity for readability and reusability, an optional but common practice. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`boolean`** — named after George Boole; stores true/false. [S1]
- **Boolean expression** — a comparison that evaluates to true or false, used to build program logic. [S1]
- **Storing the result** — `boolean isGreater = x > y;` captures a comparison's outcome in a named variable. [S1]
- **Trade-off** — storing vs. inline comparison is a readability/reuse choice, not a technical requirement. [S1]

## 📖 세부 내용 (Details)
- Direct comparison: `int x = 10; int y = 9; System.out.println(x > y); // true`. [S1]
- Literal comparison: `System.out.println(10 > 9); // true`. [S1]
- Equality check: `int x = 10; System.out.println(x == 10); // true`. [S1]
- Stored result: `boolean isGreater = x > y; System.out.println(isGreater);`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 이후 If...Else 챕터에서 이 boolean 표현식이 조건 분기의 기반이 된다. [S1]

## 💻 코드 패턴 (Code patterns)
Storing a comparison result (Java):
```java
int x = 10;
int y = 9;
boolean isGreater = x > y;
System.out.println(isGreater);  // true
```

## ✅ 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 Booleans Type]], [[Java Operators Comparison]], [[Java If Else]]
- **참조 맥락:** 모든 조건문/비교 연산의 기초 — If...Else 챕터로 직접 이어진다.

## 📚 출처 (Sources)
- [S1] W3Schools — Java Booleans — https://www.w3schools.com/java/java_booleans.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "Java Booleans" page (Astra wiki-curation, P-Reinforce v3.1 format).