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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
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  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

2026-07-05 00:39:13 +09:00

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title

Java Class Methods

🎯 한 줄 통찰 (One-line insight)

Non-static instance methods (fullThrottle(), speed() without static) MUST be called through an object reference (myCar.fullThrottle()), unlike the earlier static void myMethod() examples which could be called bare — the presence/absence of static determines whether an object is required to invoke a method. [S1]

🧠 핵심 개념 (Core concepts)

Instance method — declared without static; must be called via an object (objectName.methodName()). [S1]
Dot syntax for methods — same . operator used for attributes now invokes methods on an object. [S1]
Method with parameter on an object — myCar.speed(200); passes an argument through the object reference. [S1]
Multi-class organization — Main.java holds the class+methods, Second.java holds main() that instantiates and calls them (same pattern as Classes chapter). [S1]

📖 세부 내용 (Details)

Instance methods defined and called: public void fullThrottle() { System.out.println("The car is going as fast as it can!"); } public void speed(int maxSpeed) { System.out.println("Max speed is: " + maxSpeed); } ... Main myCar = new Main(); myCar.fullThrottle(); myCar.speed(200);. [S1]
Explained: object creation is required before methods can be called via dot syntax, contrasted with earlier static-method examples. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 자동차(Car) 객체의 fullThrottle/speed 메서드 호출이 인스턴스 메서드 활용의 대표 예시다. [S1]

💻 코드 패턴 (Code patterns)

Calling instance methods via an object reference (Java):

public class Main {
    public void fullThrottle() {
        System.out.println("The car is going as fast as it can!");
    }
    public void speed(int maxSpeed) {
        System.out.println("Max speed is: " + maxSpeed);
    }
    public static void main(String[] args) {
        Main myCar = new Main();
        myCar.fullThrottle();
        myCar.speed(200);
    }
}

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.88
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: Java Tutorial
관련 개념: Java Class Attributes, Java Constructors, Java Methods
참조 맥락: 인스턴스 메서드는 객체를 통해서만 호출 가능 — 생성자 챕터로 이어짐.

📚 출처 (Sources)

[S1] W3Schools — Java Class Methods — https://www.w3schools.com/java/java_class_methods.asp

📝 변경 이력 (Change history)

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

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