Question

Please write in JAVA ONLY

Please use a dialog box to prompt the user to enter the radius for a circle (radius should be a double).

Then, use a Message Box to display the Radius, Area and Circumference of the circle with that Radius.

You will use the Math class constant Math.PI to calculate the Area and Circumference.

Answer 1

CircleArea.java

import javax.swing.JOptionPane;

public class CircleArea {

  
   public static void main(String[] args) {
       double radius = Double.parseDouble(JOptionPane.showInputDialog("Enter circle radius: "));
       double area = Math.PI * radius * radius;
       double circumference = 2 * Math.PI * radius;
       JOptionPane.showMessageDialog(null, "Circle Radius is "+radius+" Area is "+area+" Circumference is "+circumference);
   }

}

Output:

Input Enter circle radius: 8.5 OK Cancel

Message Circle Radius is 8.5 Area is 226.98006922186258 Circumference is 53.40707511102649 OK