Generate JAVA File from XSD using XJC Tool (JAXB)

Hello world xsd file :

Then Initiate the command from command line : Generated class files are :

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, vJAXB 2.1.10 in JDK 6 
// See http://java.sun.com/xml/jaxb 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2012.06.06 at 11:37:48 AM ALMT 
//


package com.helloworld;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;


/**
 * 
Java class for anonymous complex type.
 * 
 * 
The following schema fragment specifies the expected content contained within this class.
 * 
 * 
 * <complexType>
 *   <complexContent>
 *     <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
 *       <sequence>
 *         <element name="hackername" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *         <element name="hackercode" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *         <element name="expcode" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *       </sequence>
 *     </restriction>
 *   </complexContent>
 * </complexType>
 * 
 * 
 * 
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "hackername",
    "hackercode",
    "expcode"
})
@XmlRootElement(name = "Hacker")
public class Hacker {

    @XmlElement(required = true)
    protected String hackername;
    @XmlElement(required = true)
    protected String hackercode;
    @XmlElement(required = true)
    protected String expcode;

    /**
     * Gets the value of the hackername property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getHackername() {
        return hackername;
    }

    /**
     * Sets the value of the hackername property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setHackername(String value) {
        this.hackername = value;
    }

    /**
     * Gets the value of the hackercode property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getHackercode() {
        return hackercode;
    }

    /**
     * Sets the value of the hackercode property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setHackercode(String value) {
        this.hackercode = value;
    }

    /**
     * Gets the value of the expcode property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getExpcode() {
        return expcode;
    }

    /**
     * Sets the value of the expcode property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setExpcode(String value) {
        this.expcode = value;
    }

}

And :

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, vJAXB 2.1.10 in JDK 6 
// See http://java.sun.com/xml/jaxb 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2012.06.06 at 11:37:48 AM ALMT 
//


package com.helloworld;

import javax.xml.bind.annotation.XmlRegistry;


/**
 * This object contains factory methods for each 
 * Java content interface and Java element interface 
 * generated in the com.helloworld package. 
 * 
An ObjectFactory allows you to programatically 
 * construct new instances of the Java representation 
 * for XML content. The Java representation of XML 
 * content can consist of schema derived interfaces 
 * and classes representing the binding of schema 
 * type definitions, element declarations and model 
 * groups.  Factory methods for each of these are 
 * provided in this class.
 * 
 */
@XmlRegistry
public class ObjectFactory {


    /**
     * Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: com.helloworld
     * 
     */
    public ObjectFactory() {
    }

    /**
     * Create an instance of {@link Hacker }
     * 
     */
    public Hacker createHacker() {
        return new Hacker();
    }

}

And final one :

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, vJAXB 2.1.10 in JDK 6 
// See http://java.sun.com/xml/jaxb 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2012.06.06 at 11:37:48 AM ALMT 
//

@javax.xml.bind.annotation.XmlSchema(namespace = "http://www.helloworld.com", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.helloworld;