Java Programming

For my last and not so hard project i have to ask the user to input the radii of two circles, draw them, and then say if they intersect (if the user inputs a negative radius say they don't). The problem I'm having is that if i try to take r1 which is my user inputted number and apply it to the width/height of the circle it says i cannot use a double for g.drawOval(int,int,int,int);

my code---

 
import java.awt.*;
import java.applet.*;
import java.io.*;


public class PROJECT extends Applet {
	
	public void init() {
		
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String input;
	
		try{
		
		System.out.println("Type the radius of the first cricle.");
		input = in.readLine();
		r1 = getNumber(input);
		System.out.println("Type the radius of the second cricle.");
		input = in.readLine();
		r2 = getNumber(input);
		}catch(IOException e){}		
		
	}
public double getNumber(String input){
 
	double d;
 
	try{
	d = Double.parseDouble(input);
	} catch(NumberFormatException nfe){
	d = Double.NaN;
	}
 
	return d;
}
 
	public void paint(Graphics g) {
		Color bg = new Color(240, 0, 100);
		Color ivory = new Color(240, 240, 240);
		setBackground(bg);
		g.drawString("Welcome to Java!!", 50, 60 );
		g.setColor(ivory);
		g.fillOval(20,50,r1,r1);
		
	}
	double r1;
	double r2;
}

the error--

--------------------Configuration: PROJECT - JDK version 1.5.0_07 <Default> - <Default>--------------------
C:\Program Files\Xinox Software\JCreatorV3LE\MyProjects\LastProj\PROJECT\src\PROJECT.java:52: fillOval(int,int,int,int) in java.awt.Graphics cannot be applied to (int,int,double,double)
g.fillOval(20,50,r1,r1);
^
1 error

Process completed.