2nd/10_Wiki/Dev/Topic_Java/Java_Methods_Param.md

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

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-methods-param	Java Methods Param	Programming_Language	draft	conceptual		method parameters 자바 메서드 매개변수		B	0.9	2026-07-04	2026-07-04			java programming w3schools methods parameters	https://www.w3schools.com/java/java_methods_param.asp

Java Methods Param

🎯 한 줄 통찰 (One-line insight)

"Parameter" and "argument" are precisely distinguished, not used interchangeably — the parameter is the named variable in the method signature (fname), while the arguments are the actual values passed at call time ("Liam", "Jenny", "Anja"). [S1]

🧠 핵심 개념 (Core concepts)

• Parameter — a variable specified in the method's parentheses, acting like a local variable inside the method. [S1]
• Argument — the concrete value passed when calling the method. [S1]
• Multiple parameters — comma-separated, e.g. (String fname, int age). [S1]
• Order/count matching rule — the call's arguments must match the parameter count and order exactly. [S1]
• If/else inside methods — a common pattern for validation-style methods. [S1]

📖 세부 내용 (Details)

• Single parameter: static void myMethod(String fname) { System.out.println(fname + " Refsnes"); } ... myMethod("Liam"); // Liam Refsnes. [S1]
• Multiple parameters: static void myMethod(String fname, int age) { System.out.println(fname + " is " + age); } ... myMethod("Liam", 5); // Liam is 5. [S1]
• If/else inside a method: static void checkAge(int age) { if (age < 18) { System.out.println("Access denied..."); } else { System.out.println("Access granted..."); } } ... checkAge(20); // Access granted. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 매개변수 vs 인자 구분: 정의부의 이름(매개변수)과 호출 시 전달되는 값(인자)을 명확히 구분한다는 점이 소스에서 강조됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 나이 체크(checkAge)처럼 조건 검증 로직을 메서드로 캡슐화하는 표준 패턴이다. [S1]

💻 코드 패턴 (Code patterns)

Method with if/else validation logic (Java):

static void checkAge(int age) {
    if (age < 18) {
        System.out.println("Access denied - You are not old enough!");
    } else {
        System.out.println("Access granted - You are old enough!");
    }
}

✅ 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 Methods, Java Methods Return, Java If Else
• 참조 맥락: 메서드에 데이터를 전달하는 방법 — 반환값 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — Java Method Parameters — https://www.w3schools.com/java/java_methods_param.asp

📝 변경 이력 (Change history)

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