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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
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 classnew 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)

📚 출처 (Sources)

📝 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).