Guice: How to get instance of Singleton without injector or using Constructor Injection

Question

I have got an singleton class defined as:

@Singleton
class MySingletonClass{
   ....
}

I have another class which uses this singleton Class but

Answer 1

I think that if myClass needs the MySingletonClass, this means that there is a clear dependency between them, and hence a correct solution is to pass the instance of MySingletonClass to the constructor of MyClass.

The constructor injection is one of the the most desirable injection methods since it makes the dependency explicit and prevent the creation of MyClass with unsatisfied dependencies. If you really don't like the constructor injection, you can always use a setter injection where you can manually inject the instance of MySingletonClass.