Constructor injection using c:namespace

[Graeme Byers]

Spring 3.1.0.RC1 : Can any one spot the error I making ? Thank you for any help.

package gbpackage ;
public class Car {

       private String carName ;
       public  Car() { }
       public  Car (String carName) { this.carName = carName ; }
       public  void setCarName (String carName) { this.carName = carName ; }
       public String getCarName() { return carName ; }
}

package gbpackage ;

import org.springframework.context.ApplicationContext ;
import org.springframework.context.support.ClassPathXmlApplicationContext ;

public class  CarMain {
       public static void main (String[] args) {
               
              ApplicationContext context = new ClassPathXmlApplicationContext ("car.xml") ;
                                                          
              Car car = (Car) context.getBean("car") ;
              System.out.println (car.getCarName()) ;

}      }  

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xmlns:c="http://www.springframework.org/schema/c"

       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                           http://www.springframework.org/schema/util
                           http://www.springframework.org/schema/util/spring-util-3.0.xsd">

      <bean id="car" class="gbpackage.Car" c:carName="Ford" />
    
 </beans>

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'car' defined in class path resource [car.xml]: 
Could not resolve matching constructor (hint: specify index/type/name arguments 
for simple parameters to avoid type ambiguities)

[Sam Mercs]

From the spring documentation,

For the rare cases where the constructor argument names are not available (usually if the bytecode was compiled without debugging information), one can use fallback to the argument indexes:

<-- 'c-namespace' index declaration -->
<bean id="foo" class="x.y.Foo" c:_0-ref="bar" c:_1-ref="baz">