Question

I have experience in GWT but know nothing about JSNI or Javascript . i am searching for few days for JSNI now but i am not able to understand how to implement JSNI in my GWT project.

where and how i will add a javascript file in my GWT project, where i will write my javascript?

and then i want to call a javascript method from java/GWT

Here is a simple example of how to code a JSNI method that puts up a JavaScript alert dialog:

          public static native void alert(String msg) /*-{
          $wnd.alert(msg);
           }-*/;

but where will i add this code in my GWT project

i hvae just created a new project “HelloJSNI” and in my class HelloJSNI.java , i added this code , am i doing write ?

      public void onModuleLoad() {
        alert("call from java to Javascript");

    }
    public void testJSNI(int amt, float interestRate,
            int term){
        Window.alert("call from javascript to java");
    }
    public static native void alert(String msg) /*-{
//    $wnd.alert(msg);
      $wnd.testJSNI=
          $entry(@com.jsni.client.HelloJSNI::testJSNI(IFI));

    }-*/;
}

will i be able to see “hello JSNI “?
Thanks

Answer 1

The first and best place to learn about JSNI is this article.

If you have any more specific questions after reading that article, please ask here on SO.