javac -Xlint:覆盖不起作用 [英] javac -Xlint:overrides not working

问题描述

当我有一个类覆盖超类方法而不指定 @Override 注释时，我试图让我的 java 构建失败.

I'm trying to get my java build to fail when I have a class that overrides a superclass method without specifying the @Override annotation.

构建是通过 ant 完成的，我已将以下元素添加到我的 <javac> 任务中:

The build is being done via ant, and I've added the following elements to my <javac> task:

<compilerarg value="-Werror"/>
<compilerarg value="-Xlint:unchecked,overrides"/>

遵循了 unchecked 选项，但忽略了 overrides 选项.我还尝试将两个 Xlint 选项分成两个单独的 元素，但无济于事.我误解了这个选项的作用吗?

The unchecked option is being followed, but the overrides option is being ignored. I also tried separating the two Xlint options into two separate <compilerarg> elements, to no avail. Am I misunderstanding what this option does?

注意:这是 MacOSX (10.6) 上的 JDK6.我会遇到 OSX 特定的错误吗?

One note: this is JDK6 on MacOSX (10.6). Could I be running into a OSX-specific bug?

推荐答案

我相信您误解了 Xlint:overrides 行为.

I believe you are misunderstanding the Xlint:overrides behaviour.

据我所知，启用此检查会导致编译器在遇到用 @Override 注释的方法实际上并未覆盖超类方法时发出警告(或可能是错误).但是，它不会检查所有重写的方法是否都被正确注释.

To my knowledge, enabling this check will cause the compiler to emit warnings (or maybe errors) when it encounters a method annotated with @Override that does not actually override a superclass method. It does not, however, check that all overridden methods are annotated correctly.

刚刚测试过.当您在不覆盖超类方法的方法上指定 @Override 时，无论是否使用 Xlint 选项，编译器都会发出错误.

Just tested it. The compiler will emit an error when you specify @Override on a method that does not override a superclass method, with or without the Xlint option.

Oracle 网站 上的文档没有甚至没有提到 Xlint:overrides 选项，所以我猜它没有实现.

The documentation on Oracle's website doesn't even mention the Xlint:overrides option so I'm guessing it's not implemented.

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