import java.awt.*;
import javax.swing.*;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class CercleMagenta extends JComponent {
	@Override 
	public void paintComponent(Graphics pinceau) {
		Graphics secondPinceau = pinceau.create();

		if (this.isOpaque()) {
			secondPinceau.setColor(this.getBackground());
			secondPinceau.drawRect(0, 0, this.getWidth(), this.getHeight());
		}

		secondPinceau.setColor(Color.MAGENTA);
		secondPinceau.fillOval(0, 0, this.getWidth(), this.getHeight());
	}
}