Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.

Superclass members with default access is accessible to subclass ONLY if they are in same package. Superclass constructors are not inherited by subclass. If superclass doesn’t have default constructor ...

While JEP 447 offers greater flexibility, it preserves the essential guarantees of constructor behaviour, ensuring that subclass constructors do not interfere with superclass instantiation.

Java Reflection provides a lot of information about a given class at runtime; you can easily know all its super classes, implemented interfaces, methods, constructors, fields, and so on. But in ...