9.7 EXTRA: object Superclass

As we learned in the previous lesson, the Object class is the superclass of all other classes in Java and resides in the java.lang package, so you never need to import it explicitly. Every class you write automatically extends Object, which means it inherits a basic set of behaviors—like memory management hooks and default implementations of common methods. Because it’s the root of the class hierarchy, features like garbage collection and synchronization ultimately trace back to methods defined in Object.