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#import "/template.typ": *
#show: A => apply(A)
#set raw(lang: "java-new")
#set par(leading: 0.6em)
#assignment(14, block: true)[
Write a program to create an abstract class `Shape` with two abstract methods, `area()` and `display()` and make three concrete derived classes `Rectangle`, `Circle` and `Triangle` which can calculate area and display them seperately.
]
#scos("AbstractShapeCalculations")
=== Discussion
#skind[Classes and methods implemented in the program]
- The `Shape` abstract class:
- `abstract double area()`: To be implemented by subclasses for calculating the area.
- `abstract void display()`: To be implemented by subclasses for displaying shape details.
- The `Rectangle` class extends `Shape`:
- `double area()`: Calculates the area of a rectangle using its length and width.
- `void display()`: Displays details of the rectangle.
- The `Circle` class extends `Shape`:
- `double area()`: Calculates the area of a circle using its radius.
- `void display()`: Displays details of the circle.
- The `Triangle` class extends `Shape`:
- `double area()`: Calculates the area of a triangle using its side lengths.
- `double perimeter()`: Calculates the perimeter of a triangle.
- `void display()`: Displays details of the triangle.
- The `AbstractShapeCalculations` class contains the main program:
- `public static void main(String[])`: Implements a menu-driven program for calculating and displaying areas of different shapes (Rectangle, Circle, Triangle) based on user input. Utilizes abstract classes and polymorphism for handling various shapes and their respective calculations.
#signature()
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