Inline classes implicitly extend java.lang.Object (like enums, annotations, and interfaces) Inline classes may explicitly implement regular interfaces All instance fields of an inline class are ...

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

Unlike the ever-present java.lang.Object class, but like fellow classes in the java.util package, the java.util.Objects class must be explicitly imported in Java classes that make use of it.