GWT - 您是否忘记继承所需的模块? [英] GWT - did you forget to inherit a required module?
问题描述
在我的 GWT 应用程序中,在客户端 Java 文件中,我写了一行来打印语言环境:
In my GWT application, on the client side Java file, I have written a line to print the Locale:
System.out.println(Locale.getDefault());
这里的 Locale 是 java.util.Locale 的一个实例.
Here Locale is an instance of java.util.Locale.
我收到一个异常:09:31:53.656 [ERROR] [stockwatcher] Line 167 No source code is available for type java.util.Locale;你忘记继承一个必需的模块了吗?
令人惊讶的是,在这个类中我还使用了 java.util.ArrayList
和 java.util.Date
但我没有得到这些类的任何异常.
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.
我在这里做错了什么?
推荐答案
GWT 的客户端无法访问整个 Java API.Java.util.Locale 就是其中之一.您不能在客户端使用甚至导入它.但是您绝对可以在 GWT 的服务器端使用它.您可以在此处.
The client-side of GWT does not have access to the whole Java API. Java.util.Locale is one of them. You can't use or even import it on the client-side. But you can definitely use it on the server-side of GWT. You can find the list of classes that can be used at client-side here.
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