GWT - did you forget to inherit a required module?
问题 In my GWT application , on the client side Java file, I have written a line to print the Locale: System.out.println(Locale.getDefault()); Here Locale is an instance of java.util.Locale. I'm getting an exception: 09:31:53.656 [ERROR] [stockwatcher] Line 167 No source code is available for type java.util.Locale; did you forget to inherit a required module? Surprisingly, in this class I've also used java.util.ArrayList and java.util.Date but I did not get any exception for those classes. What am