Give three solid situations for when to use inheritance in java. Explain all situations with examples.

1. IS-A situation:

Vehicle is a class, which has some properties, like: weight,colour,brand,speed,no_of_wheels

now, car is a vehicle. In this case we have to use single inheritance .

import java.io.*;
import java.lang.*;
import java.util.*;
class Vehicle {
String brand;
String color;
double weight;
double speed;
public void move()
{
System.out.println("is moving");
}
}

class Car extends Vehicle {
String licenseNumber;
String owner;
String bodyStyle;
public void type() { System.out.println("car"); }
public static void main(String args[]) {
System.out.println(new Vehicle().brand);
System.out.println(new Car().brand);
System.out.println(" ");
new Car().type();
new Car().move();
}
}

Computer Science homework question answer, step 1, image 1

Output:

As there is no brand name is mentioned so it is null.

Computer Science homework question answer, step 1, image 2

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