Competitions

# PP2. Week 7: April 19 - 25

# Java Geometric Object

Write an application for the following UML diagram:

- Write the interface called
**GeometricObject**, which declares two methods:**getParameter()**and**getArea()**; - Write the implementation class
**Circle**, with a protected variable radius, which implements the interface**GeometricObject**; - The class
**ResizableCircle**is defined as a subclass of the class**Circle**, which also implements an interface called**Resizable**. The interface**Resizable**declares a method**resize()**, which modifies the dimension (such as radius) by the given percentage. Write the interface**Resizable**and the class**ResizableCircle**; - Write a test program to test the methods defined in
**ResizableCircle**.

Process the next instructions:

- Area - print the area of the circle;
- Perimeter - print the circumference of the circle;
- Resize percent - resize the radius of the circle that modifies the radius by the given percentage;

Initially the radius of the circle equals to **1**.

Resize by **50** percent means decrease the radius twice. Resize by **200** percent means increase the radius twice.

#### Input

Each line contains one of the instructions:

- Area
- Perimeter
- Resize percent

#### Output

Print the output for each instruction.

Input example #1

Area Perimeter Resize 50 Area Perimeter

Output example #1

3.141593 6.283185 0.785398 3.141593