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POHow to translate,use JSON in GWT?
 

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    <p>I'm new in gwt. and need to know how to use JSON in gwt so i try this simple data loader but i'm still confuse.<br> I create a project named 'tesdb3' in eclipse. I create the PHP side to access the database, and made the output as JSON..<br> I create the userdata.php in folder war. then I compile tesdb3 project. Folder tesdb3 and the userdata.php in war moved in local server(I use WAMP). I put the PHP in folder tesdb3. This is the result from my localhost/phpmyadmin/tesdb3/userdata.php</p> <pre><code>[{"kode":"002","nama":"bambang gentolet"}{"kode":"012","nama":"Algiz"}] </code></pre> <p>From that result I think the PHP side was working good.<br>Then I create UserData.java as JSNI overlay like this:</p> <pre><code>package com.tesdb3.client; import com.google.gwt.core.client.JavaScriptObject; class UserData extends JavaScriptObject{ protected UserData() {} public final native String getKode() /*-{ return this.kode; }-*/; public final native String getNama() /*-{ return this.nama; }-*/; public final String getFullData() { return getKode() + ":" + getNama(); } } </code></pre> <p>Then Finally in the tesdb3.java:</p> <pre><code>public class Tesdb3 implements EntryPoint { String url= "http://localhost/phpmyadmin/tesdb3/datauser.php"; private native JsArray&lt;UserData&gt; getuserdata(String json) /*-{ return eval(json); }-*/; public void LoadData() throws RequestException{ RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url)); builder.sendRequest(null, new RequestCallback(){ @Override public void onError(Request request, Throwable exception) { Window.alert("error " + exception); } public void onResponseReceived(Request request, Response response) { //1 //data(getuserdata(response.getText())); //2 JsArray&lt;UserData&gt; uda = JsonUtils.unsafeEval(response.getText()) data(uda); } }); } public void data(JsArray&lt;UserData&gt; data){ for (int i = 0; i &lt; data.length(); i++) { String lkode =data.get(i).getKode(); String lname =data.get(i).getNama(); Label l = new Label(lkode+" "+lname); tb.setWidget(i, 0, l); } RootPanel.get().add(new HTML("my data")); RootPanel.get().add(tb); } public void onModuleLoad() { try { LoadData(); } catch (RequestException e) { e.printStackTrace(); } } } </code></pre> <p>The result from both method i use in the onResponseReceived is the same. Just showing string "my data".<br> but the method 2 create eror like this:<br> 14:41:59.875 [ERROR] [tesdb3] Uncaught exception escaped com.google.gwt.core.client.JavaScriptException: (SyntaxError): syntax error<br><br></p> <p>Did I miss use the 2nd method?<br> Why method 1 didn't have any eror but can't show the data?</p>
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