Google Guice – Just-in-time Bindings

As bindings are defined in Binding Module, Guice uses them
whenever it needs to inject dependencies. In case bindings are
not present, it can attempt to create just-in-time bindings.
Bindings present in the binding module are called Explicit
bindings and are of higher precedence whereas just-in-time
bindings are called Implicit bindings. Note that if both
type of bindings are present, explicit bindings are considered
for mapping.

The examples for three types of Just-in-time bindings are given
below −

SR.NO. BINDING TYPE & DESCRIPTION
1
Non-private, No-argument constructors are eligible for
just-in-time bindings. Another way is to annotate a
constructor with @Inject annotation.
2
@ImplementatedBy annotation tells the guice about the
implementation class. No binding is required in Binding
Module in such a case.
3
@ProvidedBy annotation tells the guice about the provider
of implementation class. No binding is required in Binding
Module in such a case.

SR.NO.	BINDING TYPE & DESCRIPTION
1	Non-private, No-argument constructors are eligible for just-in-time bindings. Another way is to annotate a constructor with @Inject annotation.
2	@ImplementatedBy annotation tells the guice about the implementation class. No binding is required in Binding Module in such a case.
3	@ProvidedBy annotation tells the guice about the provider of implementation class. No binding is required in Binding Module in such a case.