Overriding method to generate a random radius

Question

So I'm working on this small homework assignment for my Computer Science course. What I'm supposed to be doing here is overriding my drawCircle to provide a radius for my circle between 10 - 100. Anyway I've figured out some of what I need, but I'm having an issue generating the random number. Any insight would be helpful.
public class MyCircle {
    public MyCircle(){
    double radius;
// == Page 365, EX 6.6
    public void drawCircle(Graphics g, int x, int y, int radius, Color color){
        int x1 = x - radius;
        int y1 = y - radius;
        int side = 2 * radius;
        g.setColor(color);
        g.drawOval(x, y, side, side);
   // == Page 365, EX 6.7
    public void drawCircle(Graphics g, int x, int y, int radius){
        //int x1 = x - radius;
        //int y1 = y - radius;
        //int side = 2 * radius;
        //g.setColor(Color.green);
        //g.drawOval(x, y, side, side);
        drawCircle(g, x, y, radius, Color.green);
    public void drawCircle(Graphics g, int x, int y){
        radius = (int)Math.random();
        int x1 = x - (int)radius;
        int y1 = y = (int)radius;
        int side = 2 * (int)radius;
        g.setColor(Color.WHITE);
        g.drawOval(x, y, side, side);
}So as you can seeim using Math.radius to try and do this but it only provides a number between 0.0 and 1.0.

Answer 1

Thanks for the input guys I got it to work, and it might be a little more then what I may have to do to get it to work, but its the only way I could figure it out at this point.
public void drawCircle(Graphics g, int x, int y, Color color){
        // Creates a Random number generater that Generates values from 10 - 100
        Random generator = new Random();
        double radius = generator.nextDouble() * 60 + 10;
        int x1 = x - (int)radius;
        int y1 = y = (int)radius;
        int side = 2 * (int)radius;
        g.setColor(color);
        g.drawOval(x, y, side, side);
    }