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### 인터페이스
서로 다른 장치를 연결해주는 규격을 의미한다.
ex) 컴퓨터와 모니터를 연결해주는 HDMI
자바에서의 인터페이스는 클래스와 클래스를 연결해주는 규격
추상메소드와 상수로만 이루어진다.
우리가 클래스를 만들 때 사용한 키워드 class 대신에 interface를 사용하면 된다.
Interface는 여러개 구현 가능 상속 아닌 구현…
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**Describe the bug**
Having a list of: "Duplicate class org.intellij.lang.annotations.... " errors when run the project after adding the implementation to the gradle file.
**To Reproduce**
Steps …
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See for example Nextcloud: https://github.com/nextcloud/android/blob/master/build.gradle#L49-L54
Complete error message when building without excluding the transitive dependency:
```
Duplicate …
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When I add this library to my Android project, the compilation issues are as follow:
```kt
Duplicate class org.intellij.lang.annotations.Flow found in modules jetified-annotations-13.0 (org.jetbrain…
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At current both `@NotNull` and `@Nullable` have quite broad scopes which commonly overlap:
https://github.com/JetBrains/java-annotations/blob/d7c469b3b53c2135ba1c8863fc5eb2f5d5ccb36c/common/src/main/…
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The [annotations-2.0.0.jar file](https://repo1.maven.org/maven2/com/google/code/findbugs/annotations/2.0.0/annotations-2.0.0.jar) of Maven:com.google.code.findbugs:annotations contains other packages …
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spinnoff from #6106
We named the CharacterUtils impls Java5 / Java4 but by now we don't support Java4 neither Java5 so I think it makes sense to rename them maybe to Unicode5CharacterUtils / Unicode…
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i have found a "java5" example, but not "java". is there a sample somewhere?
(also, what is the reason / differences between "java" and "java5". as I have inherited a lot of code using the "java" i…
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https://blinkfox.github.io/2018/11/09/hou-duan/java/java5-xin-te-xing-ji-shi-yong/
新特性列表以下是Java5中的引入的部分新特性,关于更详细的新特性了解,可参考这里。
泛型(Generics)
增强for循环(Enhanced for Loop)
自动装箱拆箱(Autoboxing/Unboxing)
枚举…
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https://github.com/bob04619/test1/blob/c194fd03af2d68e85bf6952a89dbc8a4fe6d2d51/java5/src/pkg/Test5.java#L6
please remove todo