How to represent oracle composite key in hibernate

Hello,
  I will create an oracle table with composite key.. How do i represent  the composite key in the hibernate file and in the bean

CREATE TABLE FAVORITES
(
  FAVORITE_ID VARCHAR2(20) NOT NULL,
  TITLE VARCHAR2(200),
  CITY VARCHAR2(40),
  STATE_CODE VARCHAR2(40),
  STATE_NAME VARCHAR2(20),
  STRING VARCHAR2(100),
  USERID VARCHAR2(30) NOT NULL
, CONSTRAINT FAVORITE_PK PRIMARY KEY
  (
    FAVORITE_ID,
    USERID
  )
  ENABLE
)
;

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This is my bean

package com.rusapi.ca.beans;

public class Favorites {
	
	String jobId,userId;
	String city,stateCode,stateName,string;
	String type,postingDate;
	
	public String getjobId(){
		return this.jobId;
	}
	public void setId(String jobId){
		this.jobId = jobId;
	}
	public String getUserId(){
		return this.userId;
	}
	public void setUserId(String userId){
		this.userId = userId;
	}
	public String getCity(){
		return this.city;	
	}
	public void setCity(String city){
		this.city = city;
	}
	public String getStateCode(){
		return this.stateCode;
	}
	public void setStateCode(String stateCode){
		this.stateCode = stateCode;
	}
	public String getStateName(){
		return this.stateCode;
	}
	public void setStateName(String stateName){
		this.stateName = stateName;
	}
	public String getString(){
		return this.string;
	}
	public void setString(String string){
		this.string = string;
	}
	public String getType(){
		return this.type;
	}
	public void setType(String type){
		this.type = type;
	}
	public String getPostingDate(){
		return this.postingDate;
	}
	public void setPostingDate(String postingDate){
		this.postingDate = postingDate;
	}
}

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hibernate file stub

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.rusapi.ca.beans">

    <class name="Favorites" table="Favorites">	
     	<id name="" column="" />	
    </class>

</hibernate-mapping>

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Thanks for your help