如何抑制字段或局部变量的FindBugs警告 [英] How to suppress FindBugs warnings for fields or local variables

问题描述

我想抑制特定字段或局部变量的FindBugs警告。 FindBugs文档指出Target的edu.umd.cs.findbugs.annotations.SuppressWarning注释[1]可以是Type，Field，Method，Parameter，Constructor，Package。
但是对我来说注释该字段并不起作用，只有当我对方法进行注释时警告才会被抑制。

I would like to suppress FindBugs warnings for specific fields or local variables. FindBugs documents that the Target can be Type, Field, Method, Parameter, Constructor, Package for its edu.umd.cs.findbugs.annotations.SuppressWarning annotation [1]. But it does not work for me to annotate the field, only when I annotate the method the warning gets suppressed.

注释整个方法似乎很宽泛我。有没有办法抑制特定字段的警告？还有另一个相关的问题[2]，但没有答案。

Annotating a whole method seems to broad to me. Is there any way to suppress warnings on specific fields? There is another related question [2], but no answer.

[1] http://findbugs.sourceforge.net/manual/annotations.html

[2] 在Eclipse中抑制FindBugs警告

演示代码：

public class SyncOnBoxed
{
    static int counter = 0;
    // The following SuppressWarnings does NOT prevent the FindBugs warning
    @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="DL_SYNCHRONIZATION_ON_BOXED_PRIMITIVE")
    final static Long expiringLock = new Long(System.currentTimeMillis() + 10);

    public static void main(String[] args) {
        while (increment(expiringLock)) {
            System.out.println(counter);
        }
    }

    // The following SuppressWarnings prevents the FindBugs warning
    @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="DL_SYNCHRONIZATION_ON_BOXED_PRIMITIVE")
    protected static boolean increment(Long expiringLock)
    {
        synchronized (expiringLock) { // <<< FindBugs warning is here: Synchronization on Long in SyncOnBoxed.increment()
            counter++;
        }
        return expiringLock > System.currentTimeMillis(); // return false when lock is expired
    }
}

推荐答案

@SuppressFBWarnings 仅抑制针对该字段声明报告的findbugs警告，而不是与该字段关联的每个警告。

@SuppressFBWarnings on a field only suppresses findbugs warnings reported for that field declaration, not every warning associated with that field.

例如，这会禁止仅将字段设置为空警告：

For example, this suppresses the "Field only ever set to null" warning:

@SuppressFBWarnings("UWF_NULL_FIELD")
String s = null;

我认为你能做的最好的事情就是将代码与警告隔离成最小的方法，然后在整个方法上禁止警告。

I think the best you can do is isolate the code with the warning into the smallest method you can, then suppress the warning on the whole method.

注意： @SuppressWarnings 被标记为已弃用，转而支持 @SuppressFBWarnings

Note: @SuppressWarnings was marked deprecated in favor of @SuppressFBWarnings

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