How to use index instead of type in constructor injection ?

<bean id="billingService" class="com.genius.spring.BillingService">

  <constructor-arg index="0" value="shaan" />

  <constructor-arg index="1" value="100" />

</bean>

Best practice is to prefer type over index for constructor argument matching.

<constructor-arg type="java.lang.String"  value="shaan" />