Question

I’m trying to get the returned value from a java method, but it returns something very strange: it returns the method itself written in javascript I think.

Here the code of the java method:

public String getNameToShow() {
        return "Chart number 1";
    }

and the javascript method:

 public native void drawJSChart(String divId, int a, String jsData) /*-{
            try {
                //First create a script where to paste the jsData
                var scriptID = [e-mail]::getNameToShow();
                console.log(scriptID);
                //Some code
            } catch (e) {
                console.error(e.message);
            }
        }-*/;

Thank you.

Answer 1

You have to pass the types of your Java function too. Writing it like this works:

package XXXXX.client;

import com.google.gwt.core.client.EntryPoint;

class _24_TestJSNIMethodCallback implements EntryPoint {
    public void onModuleLoad() {
        drawJSChart();
    }

    public String getNameToShow() {
        return "Chart number 1";
    }

    public native void drawJSChart() /*-{
        try {
            //First create a script where to paste the jsData 
            var scriptID = this
                    [e-mail]._24_TestJSNIMethodCallback::getNameToShow()();
            $wnd.alert(scriptID);
            //Some code 
        } catch (e) {
            console.error(e.message);
        }
    }-*/;

}