How To Use Single Inheritance in Java

Introduction 

 

Now, we will first write a program using a "has a relationship " in Single Inheritance. 

 

Step 1

Let's open Notepad and enter the following code.

  

Code

class Test
{
    void show()
    {
        System.out.println("welcome in java method");
    }
}
class demo
{
    public static void main(String arg[])
    {
        Test t = new Test();
        t.show();
    }
}

Step 2

Name it "hasrel.java" and save the file in any location. I saved at "C:/kiran/program".

 

Step 3

Open a command prompt (press window+R and enter cmd and hit OK).

 

 

 

 

Step 4

Go to the "command prompt".

  

 

 

Step 5

Go to "C:/kiran/program" by cmd. 

 

 

 

Step 6

Now, enter the following code for cheking my Java file is compiled or not.

 

javac hasrel.java

 

 

 

My Java file is compiled successfully.

 

Step 7

Enter the following code into the command prompt. Press Enter and see the output.

  

Java demo

 

//demo is a class name that is written in my "hasrel.java" file 

 

Output

 

  

We will now enter the program using a "is a relationship " in Single Inheritance.

  

Step 8

Enter the following code in Notepad.

  

Code

class Test
{
    void show()
    {
        System.out.println("welcome in java method!!!");
    }
}
class demo extends Test
{
    public static void main(String arg[])
    {
        demo d = new demo();
        d.show();
    }
}

Step 9

Now, enter the following code for cheking my Java file is compiled or not.

 

javac hasrel.java

 

  

My Java file is compiled succesfully.

  

Step 10

Repeat Step 7.

  

Output

 

 

I hope you like this Java file.

  

Happy Codding.