We will focus on the relationship between polymorphism and Java inheritance ... featuring Duke and Juggy: public abstract class JavaMascot { public abstract void executeAction(); ...

but they can extend only one abstract class. This is a design decision based on the fact that multiple inheritance (extending more than one class) can cause code deadlocks. Java’s engineers ...

Java does enable the option to mark a class as final to eliminate the ability to perform inheritance complete, but that is often too heavy of a hammer to drop. Marking a class as final prevents all ...