# Effective Java 3/E

![https://image.yes24.com/goods/65551284/800x0](https://image.yes24.com/goods/65551284/800x0)

* [이펙티브 자바 3판 Github](https://github.com/WegraLee/effective-java-3e-source-code)

## Summary

* [ITEM 1: Static Factory Method(정적 메소드)](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-12-static-factory-methods)
* [ITEM 2: Builder Pattern](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-13-builder-pattern)
* [ITEM 3: Singleton](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-14-singleton)
* [ITEM 4: Private Constructor](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-16-private-constructor)
* [ITEM 5: Dependency Injection](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-16-dependency-injection)
* [ITEM 6: Avoid Unnecessary Object](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-22-avoid-unnecessary-object)
* [ITEM 7: Eliminate Object Reference](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-22-eliminate-object-reference)
* [ITEM 8: Avoid finalizer and cleaner](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-25-avoid-finalizer-and-cleaner)
* [ITEM 9: try-with-resources](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-01-25-try-with-resources)
* [ITEM 10: The gerneral contract when overriding equlas](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-01-overriding-equals)
* [ITEM 11: Overriding hashCode](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-02-overriding-hashcode)
* [ITEM 12: overriding toString](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-03-overriding-tostring)
* [ITEM 13: overriding clone judiciously](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-03-overriding-clone-judiciously)
* [ITEM 14: Consider implementing comparable](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-04-comparable)
* [ITEM 15: 클래스와 멤버의 접근을 최소화해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-11-minimize-class-and-memeber)
* [ITEM 16: Use Accessor methods](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-11-use-accessor-method)
* [ITEM 17: 변경 가능성을 최소화해라(불변 클래스)](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-11-minimize-mutability)
* [ITEM 18: 상속보단 컴포지션을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-12-use-composition)
* [ITEM 19: 상속을 고려해 설계하고 문서화해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-13-design-inheirtance)
* [ITEM 20: 추상 클래스보다 인터페이스를 우선하라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-13-prefer-interface)
* [ITEM 21: 인터페이스는 구현하는 쪽을 생각해 설계해라.](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-13-design-interface-for-posterity)
* [ITEM 22: 인터페이스는 타입을 정의하는 용도로만 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-13-use-interface-to-define-type)
* [ITEM 23: 태그 달린 클래스보다 클래스 계층구조를 활용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-14-use-class-hirarchies)
* [ITEM 24: 멤버 클래스는 되도록 static으로 구현해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-14-favor-static-memeber)
* [ITEM 25: 톱레벨 클래스는 한 파일에 하나만 생성해라.](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-02-14-limit-single-top-level-class)
* [ITEM 26: Raw type은 사용하지 마라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-19-generic-dont-use-raw-type)
* [ITEM 27: 비검사 경고를 제거해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-20-remove-unchecked-warning)
* [ITEM 28: 배열보다는 리스트를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-21-use-list-rather-than-array)
* [ITEM 29: 이왕이면 제네릭 타입으로 만들어라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-22-make-generic-type)
* [ITEM 30: 이왕이면 제네릭 메서드로 만들어라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-29-make-generic-method)
* [ITEM 31 : 한정적 와일드카드를 사용해 API 유연성을 높여라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-30-use-bounded-wildcards)
* [ITEM 32: 제네릭과 가변인수를 함께 쓸 때는 신중해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-30-careful-when-using-generic-and-varargs)
* [ITEM 33: 타입 안전 이종 컨테이너를 고려해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-05-31-consider-type-safe-heterogeneous-container)
* [ITEM 34: int 상수 대신 열거 타입을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-05-use-enum-type)
* [ITEM 35: ordinal 메서드 대신 인스턴스 필드를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-06-use-instant-field)
* [ITEM 36: 비트 필드 대신 EnumSet을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-06-use-enumset)
* [ITEM 37: ordinal 인덱싱 대신 EnumMap을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-06-use-enummap)
* [ITEM 38: 확장할 수 있는 열거타입이 필요하면 인터페이스를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-06-enum-type-implements-interface)
* [ITEM 39: 명명 패턴보다 애너테이션을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-13-use-annotation)
* [ITEM 40: @Override 어노테이션을 일관되게 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-14-consistently-use-override-annotation)
* [ITEM 41: 정의하려는 것이 타입이라면 마커 인터페이스를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-14-use-marker-interfaces-to-define-types)
* [ITEM 42: 익명 클래스보다는 람다를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-19-prefer-lambdas-to-anonymous-classes)
* [ITEM 43: 람다보다는 메서드 참조를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-20-prefer-method-references-to-lambdas)
* [ITEM 44: 표준 함수형 인터페이스를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-20-favor-the-use-of-standard-functional-interfaces)
* [ITEM 45: 스트림은 주의해서 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-20-use-streams-judiciously)
* [ITEM 46: 스트림에서 부작용 없는 함수를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-27-prefer-side-effect-free-fucntional-interface)
* [ITEM 47: 반환 타입으로는 스트림보다 컬렉션이 낫다.](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-28-prefer-collection-to-stream-as-retrun-type)
* [ITEM 48: 스트림 병렬화는 주의해서 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-06-28-use-caution-when-making-streams-pararrel)
* [ITEM 49: 매개변수가 유효한지 검사해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-04-check-parameters-for-validity)
* [ITEM 50: 적시에 방어적 복사본을 만들어라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-04-make-defensive-copies-when-needed)
* [ITEM 51: 메서드 시그니처를 신중히 설계해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-05-design-method-signatures-carefully)
* [ITEM 52: 다중정의는 신중히 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-05-use-overloading-judiciously)
* [ITEM 53: 가변인수는 신중히 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-11-use-varargs-judiciously)
* [ITEM 54: null이 아닌, 빈 컬렉션이나 배열을 반환해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-12-return-empty-collections-or-arrays-not-null)
* [ITEM 55: Optional 반환은 신중하게 해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-12-return-optionals-judiciouly)
* [ITEM 56: 공개된 API 요소에는 항상 주석을 작성해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-12-write-doc-comments-for-all-exposed-api-elements)
* [ITEM 57: 지역변수의 범위를 최소화해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-25-minimize-the-scope-of-local-variables)
* [ITEM 58: 전통적인 for 문보다는 for-each문을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-25-prefer-foreach-loops-to-traditional-for-loops)
* [ITEM 59: 라이브러리를 익히고 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-25-know-and-use-the-libraries)
* [ITEM 60: 정확한 답이 필요하다면 float와 double은 피해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-25-avoid-float-and-double-if-exact-answers-are-required)
* [ITEM 61: 박싱된 기본 타입보다는 기본 타입을 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-25-prefer-primitivie-types-to-boxed-primitives)
* [ITEM 62: 다른 타입이 적절하다면 문자열 사용을 피해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-25-avoid-strings-where-other-types-are-mmore-appropriate)
* [ITEM 63: 문자열 연결은 느리니 주의해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-31-beware-the-performance-of-string-concatenation)
* [ITEM 64: 객체는 인터페이스를 사용해 참조해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-31-refer-to-objects-by-their-interfaces)
* [ITEM 65: 리플렉션보다는 인터페이스를 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-31-prefer-interfaces-to-reflection)
* [ITEM 66: 네이티브 메서드는 신중히 사용해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-31-use-native-methods-judiciously)
* [ITEM 67: 최적화는 신중히 해라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-31-optimize-judiciously)
* [ITEM 68: 일반적으로 통용되는 명명 규칙을 따라라](https://dahye-jeong.gitbook.io/java/java/effective_java/2021-07-31-adhere-to-generally-accepted-naming-conventions)