WebService DataControls programmatically construct java class en jdeveloper 11g

1. I have a data control what is a web service client to URL https:
2. JDev 11g build a model
3. I need to call this data control from java class
4. My java class simply must call a method of the web service, this method I see in the DAta Control, with the parameter and just return the String,
5. this is not a Web Application, is swing, I not have a Context
method in WS
public String ConsultaPlaca(String arg1);
How I can implement this?
Just in Java Class, not in page JSP. the java class is a library of other Java class, I need to build a file .jar

Hi Vishal,
I created the class as mentioned in the link. But when I try to test the web service, I get the following error :
weblogic.application.ModuleException: [HTTP:101216]Servlet: "oracle.apps.ddr.testFileDownload" failed to preload on startup in Web application: "Application7-Project1-context-root".
javax.xml.ws.WebServiceException: Annotation @com.sun.xml.internal.ws.developer.StreamingAttachment(parseEagerly=true, dir=, memoryThreshold=40000) is not recognizable, atleast one constructor of class com.sun.xml.internal.ws.developer.StreamingAttachmentFeature should be marked with @FeatureConstructor
     at com.sun.xml.ws.binding.WebServiceFeatureList.getWebServiceFeatureBean(WebServiceFeatureList.java:176)
     at com.sun.xml.ws.binding.WebServiceFeatureList.parseAnnotations(WebServiceFeatureList.java:148)
     at com.sun.xml.ws.binding.WebServiceFeatureList.<init>(WebServiceFeatureList.java:113)
Any ideas on how I can make it work ?
Thanks and Regards,
Pritom

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Edited by: 962154 on Sep 28, 2012 2:37 PM

I have very simple java class which I want to expose as a web service. I am using the Jdeveloper's in-built wizard to "Creat Web Service" from a java class. While doing so when I am selecting a method to be exposed as a web service, I get a error pop-up which says "Failed to load system class."
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Edited by: 962154 on Sep 28, 2012 2:37 PM

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suresh wrote:
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When i run ant it complains:
[servicegen] weblogic.xml.schema.binding.BindingException: Invalidclass received:
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