javax.annotation.Nonnull vs assert [英] javax.annotation.Nonnull vs assert

问题描述

我在方法参数上使用Findbugs和javax.annotation.Nonnull。

I'm using Findbugs and javax.annotation.Nonnull on method parameters.

在私有方法上，我通常添加一个断言行来检查null，如

On private methods I usually add an assert line to check for nullness like

private void myMethod(@Nonnull String str) {
    assert str != null
    ....

最新的Netbeans版本（7.3rc2）报告不需要断言检查（因为Nonnull注释） 。我不完全确定这是一个Netbeans错误。

Latest Netbeans version (7.3rc2) is reporting that the assert check is not necessary (because of the Nonnull annotation). I'm not fully sure this is a Netbeans bug or not.

断言行是否可以删除，因为我指定了@Nonnull注释？

Can the assert line be removed because I specified the @Nonnull annotation ?

据我所知，注释仅在静态分析期间使用，而assert在启用时在执行期间处于活动状态，因此两个不是替代。

As far as I understand, the annotation is used only during static analysis while assert is, when enabled, active during execution so the twos are not alternative.

推荐答案

在运行时评估断言，该注释有助于FindBugs在运行时分析期间捕获问题。由于两个检查都不是真正冲突，你可以保持两者。如果我的IDE告诉我删除断言，我会觉得很烦人。

The assert is evaluated at runtime, the annotation helps FindBugs catch problems during the analysis before runtime. As both checks are not really conflicting you could keep them both. I would find it annoying if my IDE told me to remove the assert.

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