Unable to validate a JDOM document or element with the Schema class of jdom contrib package.

Unable to validate a JDOM document or element with the Schema class of jdom contrib package.I make a customValidation method and i try to Validate a JDOM document. the problem is that 
every time I get an exception "Failed to parse
schema "file:/C:/messages.xsd": no validation engine available for: http://www.w3.org/2001/XMLSchema."
I have try to Parse the xsd with following String values but all the times I failed.String uriFile = "C:/messages.xsd"
String uriFile = "file:/C:/messages.xsd"Below is the code and the xml,xsd.public void
customValidation() throws JDOMException, IOException{

      

      String xmlFile = "C:/messages.xml";

      SAXBuilder
builder = new SAXBuilder();

      Document
doc = builder.build(new FileInputStream(xmlFile));

             

      String schemaFile = "C:/messages.xsd";

      File file =
new File(schemaFile);

            

      String uriFile =
file.toURL().toString();

      Schema
schema = Schema.parse( uriFile, Schema.W3C_XML_SCHEMA);

            

      List errors = schema.validate(doc);

            if (errors != null) {

          // Validation errors

          for (Iterator
i=errors.iterator(); i.hasNext(); ) {

              
ValidationError e = (ValidationError)(i.next());

              
System.out.println(e);

            }

            }

          // Else: No error, document is valid.

      }

 

messages.xml<?xml version="1.0" encoding="UTF-8"?>
<messages xmlns="http://www.w3schools.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3schools.com messages.xsd">

  <message id="first">
    <english>first msg</english>
    <greek>first msg.</greek>
  </message>
  
  <message id="second">
    <english>second msg</english>
    <greek>second msg.</greek>
  </message>
  
</messages>

messages.xsd:<?xml version="1.0"?>

<xs:schema 
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.w3schools.com"
targetNamespace="http://www.w3schools.com"
elementFormDefault="qualified">

<xs:element name="messages" >
  <xs:complexType>
    <xs:sequence>
        <xs:element name="message" maxOccurs="unbounded">
            <xs:complexType>
                <xs:sequence>
                    <xs:element name="english" type="xs:string" minOccurs="0" />
                    <xs:element name="greek" type="xs:string" minOccurs="0" />
                </xs:sequence>
                <xs:attribute name="id" type="xs:string" />
            </xs:complexType>
        </xs:element>
    </xs:sequence>
  </xs:complexType>
</xs:element>
</xs:schema>Thanks in advance. 
John Dousaitis.




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