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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-intro Java Intro Programming_Language draft conceptual
Java Introduction
자바 소개
B 0.9 2026-07-04 2026-07-04
java
programming
w3schools
basics
https://www.w3schools.com/java/java_intro.asp

Java Intro

🎯 한 줄 통찰 (One-line insight)

Java (1995, owned by Oracle, running on 3+ billion devices) is a platform-independent, object-oriented language whose syntactic closeness to C++/C# makes cross-language switching relatively easy. [S1]

🧠 핵심 개념 (Core concepts)

  • Origin — created in 1995, owned by Oracle. [S1]
  • Use cases — mobile (especially Android), desktop, web applications, web/app servers, games, database connections. [S1]
  • Cross-platform — runs on Windows, Mac, Linux, Raspberry Pi, etc. [S1]
  • Object-oriented — gives programs clear structure and reusable code, lowering development cost. [S1]
  • Similarity to C++/C# — makes switching between these languages easier. [S1]
  • Free and open-source, with large community support. [S1]

📖 세부 내용 (Details)

  • Hello World example: [S1]
public class Main {
    public static void main(String[] args) {
        String name = "John";
        System.out.println("Hello " + name);
    }
}

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 이후 Syntax 챕터에서 이 Hello World 예제의 각 구성요소가 상세히 설명된다. [S1]

💻 코드 패턴 (Code patterns)

Hello World (Java):

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello " + "John");
    }
}

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)

📚 출처 (Sources)

📝 변경 이력 (Change history)

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