how to create a circle in java

1// x position, y position, x size, y size.
2ellipse(0, 0, 100, 100);

1import java.util.Scanner;
2public class AreaOfCircle {
3   public static void main(String args[]){
4      int radius;
5      double area;
6      Scanner sc = new Scanner(System.in);
7      System.out.println("Enter the radius of the circle ::");
8      radius = sc.nextInt();
9      area = (radius*radius)*Math.PI;
10      System.out.println("Area of the circle is ::"+area);
11   }
12}

1public class scratch {
2    public static void main(String[] args) {
3        JFrame window = new JFrame();
4        window.setTitle("Christmas Tree");
5        window.setSize(700, 600);
6        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
7        window.setVisible(true);
8        DrawingComponent DC = new DrawingComponent();
9        window.add(DC);
10    }
11}
12class DrawingComponent extends JComponent{
13      public void paint(Graphics graph0){
14        Graphics2D graph = (Graphics2D) graph0;
15        Ellipse2D.Double circle = new Ellipse.Double(5, 5, 25, 25);
16        graph.fill(circle);
17      }
18}