如何配置Maven Checkstyle插件以允许一行上进行多个分配？

Question

I am using the maven checkstyle plugin and running into this error:

InnerAssignment: Inner assignments should be avoided.

I read about this error here . Although this check makes sense to me, I would like to configure the plugin so that it does not complain about inner assignments of the form:

i = j = k = l = m = 0;

which is what I really have in my code. How can this be done?

Answer 1

You need to define your own rules by providing your own checkstyle.xml file as next:

In your pom file, configure the plugin as next

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-checkstyle-plugin</artifactId>
    <version>2.17</version>
    <configuration>
        <configLocation>${pom.basedir}/checkstyle.xml</configLocation>
        <encoding>UTF-8</encoding>
    </configuration>
</plugin>

Then take the default checkstyle.xml file from the checkstyle project and simply customize it by removing the module InnerAssignment . To do so simply remove the following line from your own checkstyle.xml file:

<module name="InnerAssignment"/>

Response Update:

Actually the way we can customize this rule cannot fulfill your requirements anyway because you can decide to enable by assign type not by the way you do it. I mean if you decide to disable it for = you would actually disable it for i = j = k = l = m = 0; but also String s = Integer.toString(i = 2); which is not what you want. Moreover I did the test and even what we have in the doc is not working, it seems that this rule is not even configurable, so you keep it as it is or you remove it as proposed above.