Hi,
Thanks for the reply. I have changed the following things you asked me
to do.
This is the code of my onSuceess Method
public void onSuccess(ArrayList<String> result) {
// TODO
Auto-generated method stub
// String str [] =
(String []) result.toArray (new String
[result.size ()]);
// String h1 =
Integer.toString(result.get(0));
String str [] =
new String [result.size ()];
//copying
arraylist to string array
str =
(String[]) result.toArray (str);
dialogBox.setText("Remote Procedure Call");
serverResponseLabel
.removeStyleName("serverResponseLabelError");
// I want to display
the first value of the array
serverResponseLabel.setHTML(str[0]);
dialogBox.center();
closeButton.setFocus(true);
}
I am getting the following error
[ERROR] Uncaught exception escaped
java.lang.ArrayIndexOutOfBoundsException: 0
at com.example.test9.client.Test9$1MyHandler$1.onSuccess(Test9.java:
166)
at com.example.test9.client.Test9$1MyHandler$1.onSuccess(Test9.java:
1)
at
com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived
(RequestCallbackAdapter.java:215)
at com.google.gwt.http.client.Request.fireOnResponseReceivedImpl
(Request.java:264)
at com.google.gwt.http.client.Request.fireOnResponseReceivedAndCatch
(Request.java:236)
at com.google.gwt.http.client.Request.fireOnResponseReceived
(Request.java:227)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:
103)
at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod
(IDispatchImpl.java:126)
at com.google.gwt.dev.shell.ie.IDispatchProxy.invoke
(IDispatchProxy.java:155)
at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke
(IDispatchImpl.java:294)
at com.google.gwt.dev.shell.ie.IDispatchImpl.method6
(IDispatchImpl.java:194)
at org.eclipse.swt.internal.ole.win32.COMObject.callback6
(COMObject.java:117)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
at com.google.gwt.dev.SwtHostedModeBase.processEvents
(SwtHostedModeBase.java:235)
at com.google.gwt.dev.HostedModeBase.pumpEventLoop
(HostedModeBase.java:558)
at com.google.gwt.dev.HostedModeBase.run(HostedModeBase.java:405)
at com.google.gwt.dev.HostedMode.main(HostedMode.java:232)
i dunno how can be arrayindex out of bound, i am copying it correctly
i belive.
Thanks a lot
On Jul 16, 8:42 am, Sean <[email protected]> wrote:
> In all places you reference your callback, including the Async
> Interface, make it's
>
> AsyncCallback<ArrayList<String>> callback
>
> and NOT:
>
> AsyncCallback<<String> callback
>
> On Jul 15, 6:52 pm, Chad <[email protected]> wrote:
>
> > Well, just that. The code you originally posted showed you trying to
> > retrieve integer data from your result set, but your table contains
> > string type data so your code wouldn't have worked. Now, the error you
> > posted looks like you are trying to cast your result to a String in
> > your onSuccess method. Your result will be an ArrayList. You need to
> > iterate it and read each string in it.
>
> > HTH,
> > Chad
>
> > On Jul 15, 10:54 am, Rahul <[email protected]> wrote:
>
> > > Hi Sean,
> > > Thanks for replying.
> > > I understood what you are trying to say.
>
> > > @Chad can you elborate on "Your code would only work if the
> > > SourceTableName column in the
> > > SourceTables table is of an integer type. " My column name is
> > > presently an varchar type
>
> > > On Jul 15, 11:49 am, Rahul <[email protected]> wrote:
>
> > > > Hi,
> > > > Thanks for replying
> > > > I am getting the following error
>
> > > > [ERROR] Uncaught exception escaped
> > > > java.lang.ClassCastException: java.util.ArrayList cannot be cast to
> > > > java.lang.String
> > > > at
> > > > com.example.test7.client.Test7$1MyHandler$1.onSuccess(Test7.java:
> > > > 1)
> > > > at
> > > > com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceiv
> > > > ed
> > > > (RequestCallbackAdapter.java:215)
> > > > at com.google.gwt.http.client.Request.fireOnResponseReceivedImpl
> > > > (Request.java:264)
> > > > at
> > > > com.google.gwt.http.client.Request.fireOnResponseReceivedAndCatch
> > > > (Request.java:236)
> > > > at com.google.gwt.http.client.Request.fireOnResponseReceived
> > > > (Request.java:227)
> > > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > > > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> > > > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
> > > > Source)
> > > > at java.lang.reflect.Method.invoke(Unknown Source)
> > > > at
> > > > com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:
> > > > 103)
> > > > at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod
> > > > (IDispatchImpl.java:126)
> > > > at com.google.gwt.dev.shell.ie.IDispatchProxy.invoke
> > > > (IDispatchProxy.java:155)
> > > > at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke
> > > > (IDispatchImpl.java:294)
> > > > at com.google.gwt.dev.shell.ie.IDispatchImpl.method6
> > > > (IDispatchImpl.java:194)
> > > > at org.eclipse.swt.internal.ole.win32.COMObject.callback6
> > > > (COMObject.java:117)
> > > > at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native
> > > > Method)
> > > > at
> > > > org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
> > > > at
> > > > org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
> > > > at com.google.gwt.dev.SwtHostedModeBase.processEvents
> > > > (SwtHostedModeBase.java:235)
> > > > at com.google.gwt.dev.HostedModeBase.pumpEventLoop
> > > > (HostedModeBase.java:558)
> > > > at
> > > > com.google.gwt.dev.HostedModeBase.run(HostedModeBase.java:405)
> > > > at com.google.gwt.dev.HostedMode.main(HostedMode.java:232)
>
> > > > any suggestions where am i going wrong ?
>
> > > > On Jul 15, 11:44 am, Chad <[email protected]> wrote:
>
> > > > > Rahul,
>
> > > > > Based on your query (select SourceTableName from SourceTables), I
> > > > > would guess that your result set would contain a single column with
> > > > > string data (char or varchar in SQL). If that's correct, then your
> > > > > loop should look more like this:
>
> > > > > while (rs.next()) {
> > > > > rowArray.add(rs.getString(1));
>
> > > > > }
>
> > > > > You can also use the column name, as in:
>
> > > > > while (rs.next()) {
> > > > > rowArray.add(rs.getString("SourceTableName"));
>
> > > > > }
>
> > > > > Your code would only work if the SourceTableName column in the
> > > > > SourceTables table is of an integer type.
>
> > > > > HTH,
> > > > > Chad
>
> > > > > On Jul 15, 9:58 am, Rahul <[email protected]> wrote:
>
> > > > > > Hi,
> > > > > > I apologize because this topic is again n again asked on the forum,
> > > > > > but after reading the topics I was not able to get an answer to my
> > > > > > problem.
>
> > > > > > I am connecting to a server and trying to display an sql query on
> > > > > > the
> > > > > > browser. Here is my server side code:
>
> > > > > > public class GreetingServiceImpl extends RemoteServiceServlet
> > > > > > implements
> > > > > > GreetingService {
> > > > > > private Connection conn = null;
> > > > > > private String status;
> > > > > > private String connString = "Initial value";
> > > > > > private String url = "jdbc:sqlserver:;database";
> > > > > > private String user = "";
> > > > > > private String pass = "";
> > > > > > public ResultSet rs;
> > > > > > public Statement stm;
> > > > > > ArrayList rowArray = new ArrayList();
> > > > > > String name;
> > > > > > public ArrayList greetServer(String input) {
> > > > > > String serverInfo =
> > > > > > getServletContext().getServerInfo();
> > > > > > String userAgent =
> > > > > > getThreadLocalRequest().getHeader("User-Agent");
> > > > > > // String s1 = "Select * from Patient";
> > > > > > try {
> > > > > > Class.forName
> > > > > > ("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
> > > > > > // conn = DriverManager.getConnection(url,user,pass);
> > > > > > conn = DriverManager.getConnection
> > > > > > ("jdbc:sqlserver:;database","username","password");
> > > > > > connString = "We connected";
> > > > > > stm = conn.createStatement();
> > > > > > String query1;
> > > > > > rs = stm.executeQuery("select SourceTableName from
> > > > > > SourceTables");
>
> > > > > > while (rs.next()) {
> > > > > >
> > > > > > rowArray.add(String.valueOf(rs.getInt(1)));
>
> > > > > > }
>
> > > > > > } catch (Exception e) { connString =
> > > > > > e.getMessage();}
>
> > > > > > // if (conn != null)
> > > > > > // connString = "We connected";
> > > > > > // else
> > > > > > // connString = "We failed to connect";
>
> > > > > > return rowArray;
> > > > > > }
>
> > > > > > }
>
> > > > > > I am confused in the following areas:
> > > > > > 1) My sql query contains 4 values (string) is while(rs.next()) loop
> > > > > > the correct way to copy into from ResultSet to Arraylist?
> > > > > > 2) I have made my return type to Arraylist, so in the default gwt
> > > > > > application when the user clicks the send button would it show the
> > > > > > four values of my sql query or not?
>
> > > > > > If anyone has some tutorials over how to do this plz tell the links
> > > > > > that would be very helpful
> > > > > > thanks
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