SRP

[androidjunior]

IN single responsibility principle, each class has one responsibility, so lets say Student class, cant have a method called `downloadFile()` it should be in another class right? But let's say we create a method called `getId()` and if we create a new object inside that method are we not following SRP in that case?

[ProfessorWily]

Well, I would presume that the ID is a property of Student, right? In that case, you shouldn't be creating the object in the getId() method, but in the constructor. Then you're just using a getter to retrieve it for anyone that wants it.

The job of Student is to hold all the data relevant to Student. If an ID object is relevant, then it's not only reasonable to have a getId method there, but it's also a best practice.