从JSNI调用Java方法的GWT问题 [英] GWT problem with calling Java methods from JSNI

问题描述

我在本页尝试了谷歌的例子：
http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5& s = google-web-toolkit-doc-1-5& t = DevGuideJavaFromJavaScript

我希望能够从JSNI调用Java方法，但什么都没发生。没有错误，但方法没有被调用。但是，我可以修改我的类中的字段。

以下是我尝试的代码：

  package com.jsni.client; 
 import com.google.gwt.core.client.EntryPoint; 
 
公共类Testjsnii实现EntryPoint {
字符串myInstanceField; 
 static int myStaticField; 
 
 void instanceFoo（String s）{
 System.out.println（s）; 
} 
 
 static void staticFoo（String s）{
 System.out.println（s）; 
 
 
 public native void bar（Testjsnii x，String s）/ *  -  {
 
 this。@ com.jsni.client.Testjsnii :: instanceFoo（ Ljava /郎/字符串;）（S）; 
 x。@ com.jsni.client.Testjsnii :: instanceFoo（Ljava / lang / String;）（s）; 
 @ com.jsni.client.Testjsnii :: staticFoo（Ljava / lang / String;）（s）; 
 var val = this。@ com.jsni.client.Testjsnii :: myInstanceField; 
}  -  * /; 
 
 public void onModuleLoad（）{
 bar（this，Hello）; 
 
 
 
 
 $ b $ p 
 $ b 
它不会在控制台上打印任何内容，说：
 
lockquote 
  [testjsnii]  -  JSNI方法
'@ com.jsni.client.Testjsnii :: bar（ Lcom / jsni / client / Testjsnii; Ljava / lang / String;）'returned>一个类型为JavaScript对象（1）的值，但被声明为void;它应该不会返回一个值> 
 
我想知道问题所在。
 
 
 
感谢您的帮助。
解决方案
您实际上遇到Chrome（10-dev）问题， GWT DevMode插件： http://code.google。 com / p / google-web-toolkit / issues / detail？id = 5778   
I tried the example from google at this page:
http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5&s=google-web-toolkit-doc-1-5&t=DevGuideJavaFromJavaScript

I want to be able to call a Java method from JSNI, but nothing happens. No errors but the methods are not called. However, I can modify the fields from my class.

Here is the code I tried:
package com.jsni.client;
import com.google.gwt.core.client.EntryPoint;

public class Testjsnii implements EntryPoint {
      String myInstanceField;
      static int myStaticField;

      void instanceFoo(String s) {
          System.out.println(s);
      }

      static void staticFoo(String s) {
          System.out.println(s);
      }

      public native void bar(Testjsnii x, String s) /*-{

        [e-mail]::instanceFoo(Ljava/lang/String;)(s);
        [e-mail]::instanceFoo(Ljava/lang/String;)(s);
        @com.jsni.client.Testjsnii::staticFoo(Ljava/lang/String;)(s);
        var val = [e-mail]::myInstanceField;
      }-*/;

    public void onModuleLoad() {
        bar(this,"Hello");
    }
}
It prints nothing on the console but only a waring that says:

  
[WARN] [testjsnii] - JSNI method
  '@com.jsni.client.Testjsnii::bar(Lcom/jsni/client/Testjsnii;Ljava/lang/String;)' returned > a value of type JavaScript object(1) but was declared void; it should not have returned a > value at all
I wonder what is the problem.

Thanks for the help.
解决方案
You're actually running into a Chrome (10-dev) issue with the GWT DevMode plugin: http://code.google.com/p/google-web-toolkit/issues/detail?id=5778

                        
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