How would I enter all of this into java eclipse?

 

You need to perform following things to demonstrate the concept of abstract class.

 

Step 1: Create the abstract class that has following methods.

• Calculate the area of circle(Abstract method)
• Calculate the area of triangle(Abstract method)
• Calculate the area of rectangle(Method with implementation)

 

Step 2: Show how to Create another class that extends above class and provide implementation of abstract methods.

 

Step 3: Create the main method inside above class and display output of area of circle, area of triangle and area of rectangle.

You need to submit the following things:

• Java program with both the classes
• An output screenshot created using Microsoft Word