Re: HashMap argument type mismatch

2009-10-26 Thread Sudeep S 
2 quick questions.

1. are u using generics.
2. have all the objects of your hashmap implemented isSeriliazable or
Serilizable interface.

On Mon, Oct 26, 2009 at 10:51 AM, Palani pas...@gmail.com wrote:


 Hello,
I am in the process of converting from gwt 1.5 to 1.7.1 and
 getting the following error
 when I am trying to get a HashMap from the server.

 Any idea why this might happen?
 I am using JDK 1.6.0_13.

 The request looks like

 5|0|4|http://localhost:54002/Webclient/webclient/|
 E2C9084EB9E82F1F373FDB40DF5D423D|http://localhost:54002/Webclient/webclient/%7CE2C9084EB9E82F1F373FDB40DF5D423D%7C
 com.client.web.client.WebClientService|getPropertiesMapNew|1|2|3|4|0|


 method Return Type shows as class java.util.HashMap

 typeSignature is java.util.HashMap/962170901

 customSerializar is class
 com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer

 args is [[1,[java.util.HashMap/962170901],0,5], {XXX=}] looks
 like in Method.invoke


 public static void

 com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize

 (com.google.gwt.user.client.rpc.SerializationStreamWriter,java.util.HashMap)
 throws com.google.gwt.user.client.rpc.SerializationException






 =
 Exception while dispatching incoming RPC call
 com.google.gwt.user.client.rpc.SerializationException:
 java.lang.IllegalArgumentException: argument type mismatch
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
 (ServerSerializationStreamWriter.java:690)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
 (ServerSerializationStreamWriter.java:659)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
 (ServerSerializationStreamWriter.java:593)
at

 com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
 (AbstractSerializationStreamWriter.java:129)
at
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
 $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
 (ServerSerializationStreamWriter.java:530)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
 (ServerSerializationStreamWriter.java:636)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
 (ServerSerializationStreamWriter.java:666)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
 (ServerSerializationStreamWriter.java:593)
at

 com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
 (AbstractSerializationStreamWriter.java:129)
at
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
 $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
at

 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
 (ServerSerializationStreamWriter.java:530)
at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:573)
at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess
 (RPC.java:441)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
 (RPC.java:529)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
 (RemoteServiceServlet.java:166)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost
 (RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
 org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
 487)
at org.mortbay.jetty.servlet.ServletHandler.handle
 (ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle
 (SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle
 (SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle
 (ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
 405)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle
 (ContextHandlerCollection.java:206)
at org.mortbay.jetty.handler.HandlerWrapper.handle
 (HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at
 org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
 505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content
 (HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run

Re: HashMap argument type mismatch

2009-10-26 Thread Palani 


Thanks for the reply.
(1) Yes, I am using generics.

(2) I am putting only String in the map

Below is how the code looks like



// method that gets the data from the server
public void getPropertiesMap {
AsyncCallbackHashMapString, String callback = new
AsyncCallbackHashMapString, String() {
public void onSuccess(HashMapString, String 
result) {

}
public void onFailure(Throwable caught) {
System.out.println(caught);

}

};
service.getPropertiesMap(callback);
}


// Method declartion in the service ( I tried without the
@gwt.typeArgs declaration also).

/**
* @gwt.typeArgs HashMapString, String
 */
HashMapString, String getPropertiesMap() throws
InvalidSessionException;


//Method declaration in ServiceAsync
void getPropertiesMap(AsyncCallbackHashMapString, String
callback);




// Service Impl method

public HashMapString, String getPropertiesMap()
throws InvalidSessionException {
HashMap m = new HashMap();
m.put(XXX, );
return m;
}




On Oct 26, 12:49 pm, Sudeep S sudee...@gmail.com wrote:
 2 quick questions.

 1. are u using generics.
 2. have all the objects of your hashmap implemented isSeriliazable or
 Serilizable interface.

 On Mon, Oct 26, 2009 at 10:51 AM, Palani pas...@gmail.com wrote:

  Hello,
         I am in the process of converting from gwt 1.5 to 1.7.1 and
  getting the following error
  when I am trying to get a HashMap from the server.

  Any idea why this might happen?
  I am using JDK 1.6.0_13.

  The request looks like

  5|0|4|http://localhost:54002/Webclient/webclient/|
  E2C9084EB9E82F1F373FDB40DF5D423D|http://localhost:54002/Webclient/webclient/%7CE2C9084EB9E82F1F373FDB4...
  com.client.web.client.WebClientService|getPropertiesMapNew|1|2|3|4|0|

  method Return Type shows as class java.util.HashMap

  typeSignature is java.util.HashMap/962170901

  customSerializar is class
  com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer

  args is [[1,[java.util.HashMap/962170901],0,5], {XXX=}] looks
  like in Method.invoke

  public static void

  com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize

  (com.google.gwt.user.client.rpc.SerializationStreamWriter,java.util.HashMap)
  throws com.google.gwt.user.client.rpc.SerializationException

  =
  Exception while dispatching incoming RPC call
  com.google.gwt.user.client.rpc.SerializationException:
  java.lang.IllegalArgumentException: argument type mismatch
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
  (ServerSerializationStreamWriter.java:690)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
  (ServerSerializationStreamWriter.java:659)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
  (ServerSerializationStreamWriter.java:593)
         at

  com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
  (AbstractSerializationStreamWriter.java:129)
         at
  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
  $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
  (ServerSerializationStreamWriter.java:530)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
  (ServerSerializationStreamWriter.java:636)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
  (ServerSerializationStreamWriter.java:666)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
  (ServerSerializationStreamWriter.java:593)
         at

  com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
  (AbstractSerializationStreamWriter.java:129)
         at
  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
  $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
         at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
  (ServerSerializationStreamWriter.java:530)
         at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:573)
         at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess
  (RPC.java:441)
         at

Re: HashMap argument type mismatch

2009-10-26 Thread Sudeep S 
in your service impl you have not used a generic version of  hashmap.
try the below code

public HashMapString, String getPropertiesMap()
   throws InvalidSessionException {
change from  *HashMap m = new HashMap(); to   HashMapString,String
m = new HashMapString,String();
*   m.put(XXX, );
   return m;
   }

Thanks
Sudeep


On Mon, Oct 26, 2009 at 11:38 PM, Palani pas...@gmail.com wrote:



 Thanks for the reply.
 (1) Yes, I am using generics.

 (2) I am putting only String in the map

 Below is how the code looks like



// method that gets the data from the server
public void getPropertiesMap {
AsyncCallbackHashMapString, String callback =
 new
 AsyncCallbackHashMapString, String() {
public void onSuccess(HashMapString,
 String result) {

}
public void onFailure(Throwable caught) {
System.out.println(caught);

}

};
service.getPropertiesMap(callback);
}


// Method declartion in the service ( I tried without the
 @gwt.typeArgs declaration also).

/**
* @gwt.typeArgs HashMapString, String
 */
HashMapString, String getPropertiesMap() throws
 InvalidSessionException;


//Method declaration in ServiceAsync
void getPropertiesMap(AsyncCallbackHashMapString, String
 callback);




// Service Impl method

public HashMapString, String getPropertiesMap()
throws InvalidSessionException {
*HashMap m = new HashMap();
 *   m.put(XXX, );
return m;
}




 On Oct 26, 12:49 pm, Sudeep S sudee...@gmail.com wrote:
  2 quick questions.
 
  1. are u using generics.
  2. have all the objects of your hashmap implemented isSeriliazable or
  Serilizable interface.
 
  On Mon, Oct 26, 2009 at 10:51 AM, Palani pas...@gmail.com wrote:
 
   Hello,
  I am in the process of converting from gwt 1.5 to 1.7.1 and
   getting the following error
   when I am trying to get a HashMap from the server.
 
   Any idea why this might happen?
   I am using JDK 1.6.0_13.
 
   The request looks like
 
   5|0|4|http://localhost:54002/Webclient/webclient/|http://localhost:54002/Webclient/webclient/%7C
   E2C9084EB9E82F1F373FDB40DF5D423D|
 http://localhost:54002/Webclient/webclient/%7CE2C9084EB9E82F1F373FDB4...
com.client.web.client.WebClientService|getPropertiesMapNew|1|2|3|4|0|
 
   method Return Type shows as class java.util.HashMap
 
   typeSignature is java.util.HashMap/962170901
 
   customSerializar is class
  
 com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer
 
   args is [[1,[java.util.HashMap/962170901],0,5], {XXX=}] looks
   like in Method.invoke
 
   public static void
 
  
 com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize
 
  
 (com.google.gwt.user.client.rpc.SerializationStreamWriter,java.util.HashMap)
   throws com.google.gwt.user.client.rpc.SerializationException
 
   =
   Exception while dispatching incoming RPC call
   com.google.gwt.user.client.rpc.SerializationException:
   java.lang.IllegalArgumentException: argument type mismatch
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
   (ServerSerializationStreamWriter.java:690)
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
   (ServerSerializationStreamWriter.java:659)
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
   (ServerSerializationStreamWriter.java:593)
  at
 
  
 com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
   (AbstractSerializationStreamWriter.java:129)
  at
   com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
   $ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
   (ServerSerializationStreamWriter.java:530)
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
   (ServerSerializationStreamWriter.java:636)
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
   (ServerSerializationStreamWriter.java:666)
  at
 
  
 com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
   (ServerSerializationStreamWriter.java:593)

Re: HashMap argument type mismatch

2009-10-26 Thread Palani 

Sudeep,
I believe that the problem has been resolved now.   The
problem was that I had the gwt-servlet.jar file in two different
locations. One in WEB_INF\lib folder and same copy in another folder
which was the main classpath.

This was causing the problem.

Thank you.


=

On Oct 26, 1:17 pm, Sudeep S sudee...@gmail.com wrote:
 in your service impl you have not used a generic version of  hashmap.
 try the below code

 public HashMapString, String getPropertiesMap()
                        throws InvalidSessionException {
 change from      *HashMap m = new HashMap(); to       HashMapString,String
 m = new HashMapString,String();
 *                       m.put(XXX, );
                        return m;
                }

 Thanks
 Sudeep

 On Mon, Oct 26, 2009 at 11:38 PM, Palani pas...@gmail.com wrote:

  Thanks for the reply.
  (1) Yes, I am using generics.

  (2) I am putting only String in the map

  Below is how the code looks like

                 // method that gets the data from the server
                 public void getPropertiesMap {
                         AsyncCallbackHashMapString, String callback =
  new
  AsyncCallbackHashMapString, String() {
                                 public void onSuccess(HashMapString,
  String result) {

                                 }
                                 public void onFailure(Throwable caught) {
                                         System.out.println(caught);

                                 }

                         };
                         service.getPropertiesMap(callback);
                 }

                 // Method declartion in the service ( I tried without the
  @gwt.typeArgs declaration also).

                         /**
                         * @gwt.typeArgs HashMapString, String
                          */
                         HashMapString, String getPropertiesMap() throws
  InvalidSessionException;

                 //Method declaration in ServiceAsync
                 void getPropertiesMap(AsyncCallbackHashMapString, String
  callback);

                 // Service Impl method

                 public HashMapString, String getPropertiesMap()
                         throws InvalidSessionException {
                         *HashMap m = new HashMap();
  *                       m.put(XXX, );
                         return m;
                 }

  On Oct 26, 12:49 pm, Sudeep S sudee...@gmail.com wrote:
   2 quick questions.

   1. are u using generics.
   2. have all the objects of your hashmap implemented isSeriliazable or
   Serilizable interface.

   On Mon, Oct 26, 2009 at 10:51 AM, Palani pas...@gmail.com wrote:

Hello,
       I am in the process of converting from gwt 1.5 to 1.7.1 and
getting the following error
when I am trying to get a HashMap from the server.

Any idea why this might happen?
I am using JDK 1.6.0_13.

The request looks like

5|0|4|http://localhost:54002/Webclient/webclient/|http://localhost:54002/Webclient/webclient/%7C
E2C9084EB9E82F1F373FDB40DF5D423D|
 http://localhost:54002/Webclient/webclient/%7CE2C9084EB9E82F1F373FDB4...
     com.client.web.client.WebClientService|getPropertiesMapNew|1|2|3|4|0|

method Return Type shows as class java.util.HashMap

typeSignature is java.util.HashMap/962170901

customSerializar is class

  com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer

args is [[1,[java.util.HashMap/962170901],0,5], {XXX=}] looks
like in Method.invoke

public static void

  com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize

  (com.google.gwt.user.client.rpc.SerializationStreamWriter,java.util.HashMap)
throws com.google.gwt.user.client.rpc.SerializationException

=
Exception while dispatching incoming RPC call
com.google.gwt.user.client.rpc.SerializationException:
java.lang.IllegalArgumentException: argument type mismatch
       at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
(ServerSerializationStreamWriter.java:690)
       at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
(ServerSerializationStreamWriter.java:659)
       at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:593)
       at

  com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
       at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
       at

  com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:530)
       at

HashMap argument type mismatch

2009-10-25 Thread Palani 

Hello,
I am in the process of converting from gwt 1.5 to 1.7.1 and
getting the following error
when I am trying to get a HashMap from the server.

Any idea why this might happen?
I am using JDK 1.6.0_13.

The request looks like

5|0|4|http://localhost:54002/Webclient/webclient/|
E2C9084EB9E82F1F373FDB40DF5D423D|
com.client.web.client.WebClientService|getPropertiesMapNew|1|2|3|4|0|


method Return Type shows as class java.util.HashMap

typeSignature is java.util.HashMap/962170901

customSerializar is class
com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer

args is [[1,[java.util.HashMap/962170901],0,5], {XXX=}] looks
like in Method.invoke


public static void
com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize
(com.google.gwt.user.client.rpc.SerializationStreamWriter,java.util.HashMap)
throws com.google.gwt.user.client.rpc.SerializationException






=
Exception while dispatching incoming RPC call
com.google.gwt.user.client.rpc.SerializationException:
java.lang.IllegalArgumentException: argument type mismatch
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
(ServerSerializationStreamWriter.java:690)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
(ServerSerializationStreamWriter.java:659)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:593)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:530)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
(ServerSerializationStreamWriter.java:636)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
(ServerSerializationStreamWriter.java:666)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:593)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:530)
at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:573)
at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess
(RPC.java:441)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
(RPC.java:529)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
(RemoteServiceServlet.java:166)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost
(RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle
(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle
(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle
(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle
(ContextHandlerCollection.java:206)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content
(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java:395)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run
(BoundedThreadPool.java:450)
Caused by: java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
at