Final answer:
The concept allowing the presentation of the same interface for different underlying forms in Java is called polymorphism. It is a core principle in object-oriented programming that, along with encapsulation, inheritance, and abstraction, helps manage complexity and maintain code.
Step-by-step explanation:
The concept that allows you to present the same interface for different underlying forms, specifically class objects in Java, is known as polymorphism. Polymorphism is a fundamental principle in object-oriented programming that enables objects to be treated as instances of their parent class rather than their actual class. This functionality makes it easier to work with different types of objects in a uniform way. For instance, in a graphics program, you might have several different types of shapes like circles, squares, and triangles, but you can manipulate all of them using the same set of methods by defining a generic 'Shape' interface. This not only makes the code more abstract, but also enhances its flexibility and reusability.
The other concepts mentioned in the question - encapsulation, inheritance, and abstraction, are also crucial in object-oriented programming. Encapsulation involves hiding the details of how objects work and enforcing access through specific methods. Inheritance is when a class derives from another class, inheriting its properties and methods. Abstraction is the concept of hiding complex realities while exposing only the necessary parts. Each of these principles plays a vital role in helping programmers manage complexity and improve the maintainability of their code.