Baixar imagem da internet

url = new URL("http://images.orkut.com/orkut/photos/OgAAAF2qtz0sgE19qcHfex4G_t9GvNP8Gjv5B4IfwFGBbqBOO2b1it0VEypkd8d5N4yJUI2Ad_wgcFPhzjBZngsNHdUAm1T1UPDtvjzjksyD8QrjxiPVixbqFCWQ.jpg");
        url.openStream();
        imagem = new ImageIcon(url);

        botão = new JButton(imagem);
        add(botão);

try {
			
			// 1MB de buffer
			final int BUFFER_SIZE = 1024 * 1024;
			
			String nomeArquivo = "e:/imagem.jpg";

			URL url = new URL(
					"http://images.orkut.com/orkut/photos/OgAAAF2qtz0sgE19qcHfex4G_t9GvNP8Gjv5B4IfwFGBbqBOO2b1it0VEypkd8d5N4yJUI2Ad_wgcFPhzjBZngsNHdUAm1T1UPDtvjzjksyD8QrjxiPVixbqFCWQ.jpg");
		
			BufferedInputStream stream = new BufferedInputStream(
					url.openStream(), BUFFER_SIZE);
			BufferedOutputStream fos = new BufferedOutputStream(
					new FileOutputStream(nomeArquivo));
			byte buf[] = new byte[BUFFER_SIZE];
			int numBytesRead;
			do {
				numBytesRead = stream.read(buf);
				if (numBytesRead > 0) {
					fos.write(buf, 0, numBytesRead);
				}
			} while (numBytesRead > 0);
			fos.flush();
			fos.close();
			stream.close();
			buf = null;

		} catch (MalformedURLException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * ImageWeb.java
 *
 * Created on 16/12/2011, 02:50:28
 */
package teste;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;

/**
 *
 * @author walter
 */
public class ImageWeb extends javax.swing.JFrame {

    /** Creates new form ImageWeb */
    public ImageWeb() {
        initComponents();
    }

    private URL downloadImagem(String caminho) {
        URL url = null;
        HttpURLConnection urlConnection = null;
        try {
            url = new URL(caminho);
            urlConnection = (HttpURLConnection) url.openConnection();
            return urlConnection.getURL();
        } catch (IOException ex) {
            Logger.getLogger(ImageWeb.class.getName()).log(Level.SEVERE, null, ex);
            return null;
        } finally {
            urlConnection.disconnect();
            url = null;
        }
    }

    public void atualizaImage(String caminho) {
        ImageIcon imagem = new ImageIcon(downloadImagem(caminho));
        jLabel.setIcon(imagem);
        jLabel.repaint();
    }
    
    public void atualizaImage1(String caminho) {
        ImageIcon imagem = new ImageIcon(downloadImagem(caminho));
        jLabel1.setIcon(imagem);
        jLabel1.repaint();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jLabel = new javax.swing.JLabel();
        jbAtualziar = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(null);

        jLabel.setBorder(javax.swing.BorderFactory.createTitledBorder("Imagem de Controle"));
        getContentPane().add(jLabel);
        jLabel.setBounds(12, 12, 281, 174);

        jbAtualziar.setText("Atualizar");
        jbAtualziar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jbAtualziarActionPerformed(evt);
            }
        });
        getContentPane().add(jbAtualziar);
        jbAtualziar.setBounds(12, 192, 72, 30);

        jLabel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Imagem de Controle"));
        getContentPane().add(jLabel1);
        jLabel1.setBounds(299, 12, 281, 174);

        pack();
    }// </editor-fold>

    private void jbAtualziarActionPerformed(java.awt.event.ActionEvent evt) {
        atualizaImage("http://www.nfe.fazenda.gov.br/scripts/srf/intercepta/captcha.aspx?opt=image");
        atualizaImage1("http://www.nfe.fazenda.gov.br/scripts/srf/intercepta/captcha.aspx?opt=image");
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(ImageWeb.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(ImageWeb.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(ImageWeb.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(ImageWeb.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new ImageWeb().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JLabel jLabel;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JButton jbAtualziar;
    // End of variables declaration
}