Inheritance is a compile-time mechanism. A super-class can have any number of subclasses. But a subclass can have only one superclass. This is because Java does not support multiple inheritance. The superclass and subclass have “is-a” relationship between them.
There are five types of inheritance in Java. They are single, multilevel, multiple, hierarchical and hybrid. I will illustrate them one by one.
Single inheritance: There are only two entities in this inheritance. One is superclass and other is subclass.
Multilevel inheritance: There are more than two entities in this inheritance. Typical example is GFS relationship. That is Grandfather-Father-Son. Son inherits from Father and Father inherits from Grandfather.
Multiple inheritance: A subclass inherits from more than one superclass. But it is not allowed in Java but it can be achieved by implementing interfaces.
Hierarchical inheritance: This kind of inheritance appears in our life so often. A superclass has many subclasses. Dog, cat, tiger, lion are all animals. They inherit from same ancestor.
Hybrid inheritance: Hybrid inheritance is the combination of single and multiple inheritance. By using Interface we can achieve multiple inheritance in Java.
There are five types of inheritance in Java. They are single, multilevel, multiple, hierarchical and hybrid. I will illustrate them one by one.
Single inheritance: There are only two entities in this inheritance. One is superclass and other is subclass.
Multilevel inheritance: There are more than two entities in this inheritance. Typical example is GFS relationship. That is Grandfather-Father-Son. Son inherits from Father and Father inherits from Grandfather.
Multiple inheritance: A subclass inherits from more than one superclass. But it is not allowed in Java but it can be achieved by implementing interfaces.
Hierarchical inheritance: This kind of inheritance appears in our life so often. A superclass has many subclasses. Dog, cat, tiger, lion are all animals. They inherit from same ancestor.
Hybrid inheritance: Hybrid inheritance is the combination of single and multiple inheritance. By using Interface we can achieve multiple inheritance in Java.
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