When a class extends a class, which extends another class, this is called multilevel inheritance. For example, class C extends class B and class B extends class A, so this type of inheritance is known as multilevel inheritance. If a class is derived from another derived class, it is called multilevel inheritance. Therefore, in C++ multilevel inheritance, a class has more than one parent class.
A class can also be derived from one class, which is already derived from another class. In multilevel inheritance, a class can inherit from a derived class. Therefore, the derived class becomes the base class of the new class. Multilevel inheritance occurs when one class extends a class that extends another class.
For example, class C extends class B and class B extends class A. This is known as multilevel inheritance. When there is a chain of inheritance, it is known as multi-level inheritance. As you can see in the example below, the BabyDog class inherits the Dog class which again inherits the Animal class, so there is multi-level inheritance.
Inheritance in Java is a mechanism in which an object acquires all the properties and behaviors of a parent object. In the example below, the Dog and Cat classes inherit the Animal class, so there is hierarchical inheritance. As in the previous example, all public and protected members of Class A are inherited in Class D, first through Class B and second through Class C. Multiple inheritance is one of the inheritances in Java types where a class extends more than one class.
The idea behind inheritance in Java is that you can create new classes that are based on existing classes. The problem with “multiple inheritance” is that the derived class will have to manage the dependency of two base classes. Multilevel inheritance refers to a mechanism in OO technology where you can inherit from a derived class, making this derived class the base class for the new class. In Java terminology, a class that is inherited is called a parent or superclass, and the new class is called a child or subclass.
We don't have to write the same code in the child class because it inherits the properties of the parent class. As with other inheritances, depending on the visibility mode used or the access specifier used when deriving, the properties of the base class are derived. In simple terms, you can say that hybrid inheritance is a combination of single and multiple inheritance. However, he had clear concepts of inheritance, so he created a child class, BoxWeight, and inherited the Box class.
Because compile-time errors are better than run-time errors, Java generates a compile-time error if 2 classes are inherited.