java very important question for exam

Problem 1.8

                       Write a program that displays the area and perimeter

of a circle

Description:

                        Using the following formula:

perimeter = 2 * radius *  

area = radius * radius *

Solution:

               public class Message {

    public static void main(String[] args) {

          float pi=3.14f,radius=30;

          System.out.println("The paramiter of circle is  "+(2*pi*radius));

          System.out.println("The area of circle is  "+(pi*radius*radius));

    } }

Output: