Drawing concentric circles using drawArc

My assignment is to draw 8 concentric circles 10 pixels apart using drawArc. The problem is that it comes out looking more like a funnel. What am I doing wrong? My code is below:

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;

public class ConcentricCircles extends JPanel {
    
    
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.setColor(Color.BLUE);
        int x1 = 10;
        int y1 = 10;
        int w = 100;
        int h = 100;
        for (int i = 1; i <= 8; i++) {
            g.drawArc(x1, y1, w, h, 0, 360);
            System.out.printf("x1=%d, y1=%d, w=%d, h=%d\n", x1, y1, w, h);
            x1 += 10;
            y1 += 10;
            w -= 10;
            h -= 10;
        }
    }
}