Which of these is a core concept of Java programming?

Inheritance is indeed a core concept of Java programming. It is a fundamental object-oriented programming principle that allows one class to inherit the fields and methods of another class. This capability promotes code reusability and establishes a natural hierarchy between classes, facilitating better organization and manageability of code.

By enabling a new class, referred to as a subclass or derived class, to inherit characteristics from an existing class—known as a superclass or base class—Java facilitates polymorphism and method overriding. This means that subclasses can modify the behavior inherited from their superclass while still retaining all of its functionalities. Inheritance forms the basis of a powerful modular programming approach, where common behaviors can be defined in general classes and specialized in subclasses, thus enhancing the program structure and aiding in maintaining large codebases.

The other concepts mentioned do not accurately reflect core principles of Java. While multithreading is a notable feature of Java allowing concurrent execution of code, it is not foundational to object-oriented programming as inheritance is. Visual programming involves creating programs through graphical interfaces instead of text code, which is not a principle of Java. Procedural programming, though an important paradigm, does not align specifically with Java's object-oriented approach, which emphasizes objects and classes.