Java program to find area of geometrical figures using method.

import java.io.*;

class Area

{

public static double circleArea (double r)

{

return Math.PI * r * r;

}

public static double squareArea (double side)

{

return side * side;

}

public static double rectArea (double width, double height)

{

return width * height;

}

public static double triArea (double base, double height1)

{

return 0.5 * base * height1;

}

public static String readLine ()

{

String input = " ";

BufferedReader in =

new BufferedReader (new InputStreamReader (System.in));

try

{

input = in.readLine ();

} catch (Exception e)

{

System.out.println ("Error" e);

} return input;

}

public static void main (String args[])

{

System.out.println ("Enter the radius");

Double radius = Double.parseDouble (readLine ());

System.out.println ("Area of circle = " circleArea (radius));

System.out.println ("Enter the side");

Double side = Double.parseDouble (readLine ());

System.out.println ("Area of square = " squareArea (side));

System.out.println ("Enter the Width");

Double width = Double.parseDouble (readLine ());

System.out.println ("Enter the height");

Double height = Double.parseDouble (readLine ());

System.out.println ("Area of Rectangle = " rectArea (width, height));

System.out.println ("Enter the Base");

Double base = Double.parseDouble (readLine ());

System.out.println ("Enter the Height");

Double height1 = Double.parseDouble (readLine ());

System.out.println ("Area of traingle =" triArea (base, height1));

}}