在带有 JDK 8 的 IDEA 中使用 Eclipse 编译器时出现“java：名为 XXX 的重复方法”问题
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"java: Duplicate methods named XXX" issue when using Eclipse compiler in IDEA with JDK 8
提问by Gelin Luo
With the following simple class I get java: Duplicate methods named spliterator with the parameters () and () are inherited from the types java.util.List<T> and java.lang.Iterable<T>error if using Eclipse compiler in IDEA with JDK 8:
java: Duplicate methods named spliterator with the parameters () and () are inherited from the types java.util.List<T> and java.lang.Iterable<T>如果在带有 JDK 8 的 IDEA 中使用 Eclipse 编译器，则使用以下简单类会出错：
public class Java8Test {
public static interface Traverable<T> extends Iterable<T> {}
public static interface List<T> extends Traverable<T>, java.util.List<T> {}
}
If change the compiler to javac, then there is no error. The error also gone if switched to JDK 6 with eclipse compiler.
如果将编译器更改为 javac，则没有错误。如果使用 eclipse 编译器切换到 JDK 6，错误也会消失。
IDEA version: 12.1.5
想法版本：12.1.5
回答by Fabian Streitel
I got the same error when trying to compile Java 7 code with a Java 8 JDK.
尝试使用 Java 8 JDK 编译 Java 7 代码时遇到了同样的错误。
The solution that worked for me was changing the JRE configured in Eclipse to a Java 7 one: Window -> Preferences -> Java -> Installed JREs. Edit the existing one and select a directory containing a Java 7 JDK.
对我有用的解决方案是将 Eclipse 中配置的 JRE 更改为 Java 7 之一：Window -> Preferences -> Java -> Installed JREs. 编辑现有的并选择一个包含 Java 7 JDK 的目录。
回答by El Marce
I had the same issue. It seem that Eclipse's 4.3 JTD is not carrying on well with Java8. On the words of Stephan Herrmann (CLA):
我遇到过同样的问题。Eclipse 的 4.3 JTD 似乎不能很好地与 Java8 兼容。关于 Stephan Herrmann (CLA) 的话：
A Java 7 compiler should never try to compile against a JRE 8. True compatibility for the scenario is not specified anywhere and may not even be possible because of default methods that have been added to the libraries in a way that ensures runtime compatibility of old code but notcompile time compatibility with a Java 7 compiler and new libraries. Hence I'm marking this bug as invalid, it's s.t. we cannot support by design.
Java 7 编译器不应尝试针对 JRE 8 进行编译。该场景的真正兼容性并未在任何地方指定，甚至可能无法实现，因为已将默认方法添加到库中以确保旧代码的运行时兼容性但 不与Java 7编译器和新库编译时的兼容性。因此，我将此错误标记为无效，这是我们无法通过设计支持的。
You may read more in here:
您可以在此处阅读更多信息：
https://bugs.eclipse.org/bugs/show_bug.cgi?id=407010
https://bugs.eclipse.org/bugs/show_bug.cgi?id=407010
and here:
和这里：
https://bugs.eclipse.org/bugs/show_bug.cgi?id=409473
https://bugs.eclipse.org/bugs/show_bug.cgi?id=409473
