A simple program to calculate the area of a circle. radius provided by user.

this is what i got but i can't compile it without an error. please help if you identify my mistake.

public class stage1 { // BEGIN Area of Circle

/**
 *    Get radius from user
 *    Set area = Math.Pi * radius * radius
 *    Output "Area : " area
 * END Area of Circle
 */

public static void main(String [] areaCircle) 
{
    Scanner keyboard = new Scanner(System.in);
    System.out.println("Enterh the circle's radius: ");
    double radius = keyboard.nextDouble();
    System.out.println("int Area");
}

}

import java.util.Scanner;
public class AreaOfCircle { 

public static void main(String [] str) 
{
    Scanner keyboard = new Scanner(System.in);
    System.out.println("Enter the circle's radius: ");
    double radius = keyboard.nextDouble();
    double PI=3.14;
    double area=PI*radius*radius;
    System.out.println("Area of circle: "+area);
    }
}