GWT and FindBugs: How to solve "Internationalization - Consider using Locale parameterized version of invoked method" error?

Question

I'm trying to achieve harmony between FindBugs and GWT 2.4 (being used with Java 6). FindBugs complains about this line ...

childrenStr.append(child.getName().toLowerCase());

with the error

Internationalization - Consider using Locale parameterized version of invoked method

To attempt to heal the pain, I added a Locale ...

childrenStr.append(child.getName().toLowerCase(Locale.ENGLISH));

but then GWT dies with the compile error ...

[ERROR] Line 346: The method toLowerCase() in the type String is not applicable for the arguments (Locale)

How can I achieve a lasting peace between the two whereby I resolve the FindBugs error and keep GWT quiet?

Thanks, - Dave

score 3 · Accepted Answer · edited May 23 '17 at 10:08

Since GWT doesn't include support for the locale sensitive String#toLowerCase(Locale) method and there is no locale sensitive lowercase conversion in the GWT API, suppress the FindBugs DM_CONVERT_CASE warning:

@edu.umd.cs.findbugs.annotations.SuppressWarnings(
    value="DM_CONVERT_CASE", 
    justification="No GWT emulation of String#toLowerCase(Locale)")
public void lowercaseUser() {
  childrenStr.append(child.getName().toLowerCase());
}

GWT and FindBugs: How to solve "Internationalization - Consider using Locale parameterized version of invoked method" error?

1 Answers1