2nd/10_Wiki/Dev/Topic_Java/Java_Anonymous.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-anonymous	Java Anonymous	Programming_Language	draft	conceptual		anonymous class 자바 익명 클래스		B	0.87	2026-07-04	2026-07-04			java programming w3schools oop anonymous-class	https://www.w3schools.com/java/java_anonymous.asp

Java Anonymous

🎯 한 줄 통찰 (One-line insight)

An anonymous class body ends with a semicolon (};) — an easy detail to miss, since it's not closing a method or normal class, but terminating the object-creation STATEMENT Animal myAnimal = new Animal() {...} that happens to contain a class body inline. [S1]

🧠 핵심 개념 (Core concepts)

• Anonymous class — a nameless class defined and instantiated in the same expression. [S1]
• Use case — overriding a method of an existing class/interface without writing a separate named class file. [S1]
• Extends a class — new Animal() { @Override method } ; — creates a one-off subclass instance inline. [S1]
• Implements an interface — the same syntax works to implement an interface on the fly. [S1]
• Required trailing semicolon — closes the object-creation statement, not just the class body. [S1]

📖 세부 내용 (Details)

• Overriding a class method anonymously: Animal myAnimal = new Animal() { public void makeSound() { System.out.println("Woof woof"); } };. [S1]
• Implementing an interface anonymously: Greeting greet = new Greeting() { public void sayHello() { System.out.println("Hello, World!"); } };. [S1]
• Use cases listed: overriding a method without a new subclass, quickly implementing an interface, passing small behaviors as objects. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 일회성 동작(override/interface 구현)을 별도 파일 없이 즉석에서 정의하는 표준 패턴이다. [S1]

💻 코드 패턴 (Code patterns)

Anonymous class implementing an interface on the fly (Java):

interface Greeting {
    void sayHello();
}
Greeting greet = new Greeting() {
    public void sayHello() {
        System.out.println("Hello, World!");
    }
};
greet.sayHello();

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.87
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: Java Tutorial
• 관련 개념: Java Interface, Java Polymorphism, Java Enums
• 참조 맥락: 일회성 클래스/인터페이스 구현 — Enums 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — Java Anonymous Class — https://www.w3schools.com/java/java_anonymous.asp

📝 변경 이력 (Change history)

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