23.7 Injecting Beans

In order to use the beans you create, you inject them into yet another bean that can then be used by an application, such as a JavaServer Faces application. For example, you might create a bean called Printer into which you would inject one of the Greeting beans:

import javax.inject.Inject;

public class Printer {

    @Inject Greeting greeting;
    ...
}

This code injects the @Default Greeting implementation into the bean. The following code injects the @Informal implementation:

import javax.inject.Inject;

public class Printer {

    @Inject @Informal Greeting greeting;
    ...
}

More is needed for the complete picture of this bean. Its use of scope needs to be understood. In addition, for a JavaServer Faces application, the bean needs to be accessible through the EL.