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COMPUTER SOFTWARE APPLICATION - CITS

Hierarchical Inheritance Example

When two or more classes inherits a single class, it is known as hierarchical inheritance. In the example given
below, Dog and Cat classes inherits the Animal class, so there is hierarchical inheritance.
File: TestInheritance3.java
class Animal{

void eat(){System.out.println(“eating...”);}
}
class Dog extends Animal{
void bark(){System.out.println(“barking...”);}
}

class Cat extends Animal{
void meow(){System.out.println(“meowing...”);}
}
class TestInheritance3{

public static void main(String args[]){
Cat c=new Cat();
c.meow();
c.eat();
//c.bark();//C.T.Error
}}

Output:
meowing...
eating...

Method Overriding in JAVA

In Java, Overriding is a feature that allows a subclass or child class to provide a specific implementation of a
method that is already provided by one of its super-classes or parent classes. When a method in a subclass has
the same name, the same parameters or signature, and the same return type(or sub-type) as a method in its
super-class, then the method in the subclass is said to override the method in the super-class.

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CITS : IT&ITES - Computer Software Application - Lesson 94 - 100