Do Spring @Component classes have to be public?

Question

I'd like to expose a component's interface as an interface and the implementing class would be package protected (and maybe in some other package):

package baz.iface

interface Foo {
    void bar();
}  


package baz.whatever

@Component
class SpringyFoo implements baz.iface.Foo {
    public void bar() { frobnicate(); }
}

Assuming baz.whatever is in the component-scan, will Spring be able to autowire a baz.iface.Foo somewhere else?

class FooClient {
    @Autowired
    private baz.iface.Foo;
}

Answer 1

No, components dont have to be public. The only requirement is that they have a no-arg constructor.