Java For Android Tutorial #18: Inheritance

Code:

package com.example;

public class java {

    public static void main(String[] str) {

        Child oChild = new Child();

        oChild.show();

        System.out.println(oChild.dumy);

    }

}

class Parent{

    String dumy = "Hello";

    public void show(){

        System.out.println("Message from the parent class");

    }

}

class Child extends Parent{

}

Inheritance provides important insights into the modular approach to programming. In Android programming, we do things by inheriting properties of activities, services and fragments. This increase the re-usability of the code as well as increase the simplicity of the code. In this program, I have used 3 classes: parent, child and one main class. After creating the instance, I am able to access everything from the parent class (as the method and variable are public and protected). In the end, I have made the method private and shown that parent private methods can't be accessed by the child class.