import awb.*;
import java.awt.*;

public class Numbers extends java.applet.Applet
{
    TextField instruct, result, mRadius, mLength;
    DoubleField gRadius, gLength;
    Button Compute;
    String sFirst, sMid, sLast, sInit, sFull;
    double radius, length, cylVol, pi=3.14159265;

    public void init ()
    {
	instruct = new TextField(72);
  	instruct.setText("Please enter radius and length below.");
	mRadius = new TextField(9);
  	mRadius.setText("radius:");
	mLength = new TextField(9);
  	mLength.setText("length:");
	gRadius = new DoubleField(10);
	gLength = new DoubleField(10);
	result = new TextField(72);
	result.setText("The volume of the cylinder is:  " + cylVol);
  	Compute = new Button("Compute");
  	add(instruct) ;
  	add(mRadius) ;
  	add(gRadius) ;
  	add(mLength) ;
  	add(gLength) ;
	add(Compute) ;
  	add(result) ;
    }

    public boolean action(Event e,Object obj)
    {
        if (e.target == Compute)
        {
	    length = gLength.getDouble();
	    radius = gRadius.getDouble();
            cylVol = pi * radius * radius * length;
	    result.setText("The volume of the cylinder is:  " + cylVol);
	    return true;
        }
	return false;
    }	
}