Icone jButton na web

import java.awt.FlowLayout;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;


public class JButtonTeste extends JFrame{
	JButton botao;
	public JButtonTeste(){
		botao = new JButton();
		try {
			ImageIcon im = new ImageIcon(new URL("http://icons-search.com/img/icons-land/IconsLandVistaHalloweenEmoticonsDemo.zip/IconsLandVistaHalloweenEmoticonsDemo-ICO-Smile.ico-48x48.png"));
			 botao.setIcon(im);
		} catch (MalformedURLException mex) {
			System.out.println("url nao encontrado");
		}
		setSize(100,100);
		setLayout(new FlowLayout(FlowLayout.LEFT));
		add(botao);
		setVisible(true);		
	}

	public static void main(String args[]){
		JButtonTeste jb = new JButtonTeste();
		jb.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}