näkyvyysratkaisu

Nappula.java

package nopeustesti;

import java.awt.Graphics;
import javax.swing.JButton;

public class Nappula extends JButton {
	public Nappula(String teksti) {
		super(teksti);
	}
	
	@Override
	public void paintComponent(Graphics g) {
		g.setColor(getBackground());
		g.fillOval(0, 0, getWidth(), getHeight());
	}
}