Array of Interface in Java

yes, it is possible. You need to fill the fields of the array with objects of Type Module

instances[0] = new MyModule();

And MyModule is a class implementing the Module interface. Alternatively you could use anonymous inner classes:

instances[0] = new Module() { public void actions() {} public void init() {}};

Does this answer your question?

java arrays interface

You would need to fill the array with instances of a class(es) that implement that interface.

Module[] instances = new Module[20];for (int i = 0; i < 20; i++){    instances[i] = new myClassThatImplementsModule();}

java arrays interface

You need to create a concrete class type that would implement that interface and use that in your array creation

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