---
id: java-characters
title: "Java Characters"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["char type", "ASCII values", "자바 문자 타입"]
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", "char", "string", "ascii"]
raw_sources: ["https://www.w3schools.com/java/java_data_types_characters.asp"]
applied_in: []
github_commit: ""
---

# [[Java Characters]]

## 🎯 한 줄 통찰 (One-line insight)
A `char` can be assigned either a single-quoted character literal OR its raw ASCII integer value — `char myVar1 = 65;` prints "A" just as reliably as `char myVar1 = 'A';`, since char IS a numeric type under the hood. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`char`** — stores a single character, in single quotes (`'A'`). [S1]
- **ASCII assignment** — a char can also be assigned its numeric ASCII value directly (e.g. `65` displays as `A`). [S1]
- **`String`** — a sequence of characters (text), double-quoted; technically a NON-primitive type, since it refers to an object with methods. [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **char is secretly numeric** — being able to assign `char myVar1 = 65;` and have it print `A` reveals that `char` is really a 16-bit numeric type interpreted as a character, not a distinct "letter" type. [S1]

## 📖 세부 내용 (Details)
- Basic char: `char myGrade = 'B';`. [S1]
- ASCII-based assignment: `char myVar1 = 65, myVar2 = 66, myVar3 = 67;` prints A, B, C. [S1]
- String (non-primitive): `String greeting = "Hello World";`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **String은 원시 타입이 아님**: 소스에서 String을 "특별한 아홉 번째 타입"이라 부르면서도, 실제로는 객체를 참조하는 비원시 타입이라고 명시함 — 이는 8개 원시 타입 목록과 별개로 이해해야 한다. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — String의 "객체"라는 개념은 이후 OOP/Classes 챕터에서 본격적으로 다뤄진다. [S1]

## 💻 코드 패턴 (Code patterns)
char via ASCII value (Java):
```java
char myVar1 = 65, myVar2 = 66, myVar3 = 67;
System.out.println(myVar1);  // A
System.out.println(myVar2);  // B
System.out.println(myVar3);  // C
```

## ✅ 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 Data Types]], [[Java Strings]], [[Java Classes]]
- **참조 맥락:** char가 숫자 타입의 일종이라는 점, String이 비원시(객체) 타입이라는 점의 첫 소개.

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

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