Inheritance in Java

Inheritance in Java. In this Article i will explain what is inheritance Java programming by stepping through the sample program below

In the sample program below, first  I will create a main class named “car ” . This main class will be inherited by the  class which i will be creating call “toyota ” . Finally i will create a class call “createCar” to access both class.

Class Car

1. First Declare a Variable for the car speed.
2. Create a Constructor for for the Car Object
3. Create the increase speed function
4. Create the decrease speed function.

 

package Automation;

public class car {
	
	// Car Engine Volume
	
	int engineVolume;
	
	int carSpeed;
	
	
	// create Object Constructor
	
	public car (int speed ){
	
	
	carSpeed = speed;

	}
	
	// Create increase Speed Function
	
	
	public void increaseSpeed (){
		
		carSpeed++;
		System.out.println("Increasing the Car Speed");


		}
   public void decreaseSpeed (){
		
		carSpeed--;
		System.out.println("Decreasing the Car Speed");


		}
	
	

}

 

Class toyota

1. First I create a class call toyota.
2. I use the extends word to inherit the car class
3. Create a constructor for class toyota
4. Using the Super word to access the car class function call“increaseSpeed ()”
5. Use the @Overridekeyword to overwrite the information inside public void increaseSpeed () >
6. Create a special function for class toyota

 

package Automation;

// Toyota inherit the car characteristic

public class toyota extends car {

	// Create a Constructor
	
	public toyota(int toyotaSpeed){
		
		super(toyotaSpeed);
		
	}
		
	// Override the default Speed
		@Override
		public void increaseSpeed (){ 
		
			System.out.println("Increasing Toyota Speed");
		
		
		}
		
		public void specialFeature(){
			
			
			System.out.println("Toyota Special Feature is less oil consumption");
			
			
		}
		
		
	}

 

Class createCar

1. First i declare a parameter ” speed” to be feed into the instance parameter later
2. Then I create a new instance call ” firstCar “
3. Then I called the newly created ” firstCar ” instance increaseSpeed() function
4. I create a new instance called ” altis” for the toyota class
5. Then i call the new altis instance function increaseSpeed() and specialFeature();function
6. Finally the most important ever remember to import both class you have created

package Automation;
import Automation.car;
import Automation.toyota;

public class createCar {

	public static void main(String[] args) {

		int speed =0;
		
		
		// Create a New Car Object
		
		car  firstCar = new car(speed);
		
		firstCar.increaseSpeed();
		
		// create a new toyota Model
		toyota altis = new toyota(speed);
		
		altis.increaseSpeed();
		altis.specialFeature();
		
		
		
		

	}

}

 

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