Image image = null;
try {
 // Membaca dari file
 File file = new File("Kabuto.png");
 image = ImageIO.read(file);

 // Membaca dari input stream
 InputStream is = new BufferedInputStream(
 new FileInputStream("Kabuto.png"));
 image = ImageIO.read(is);

 // Membaca dari URL
 URL url = new URL("http://s.itb.ac.id/~neutron0690/Kabuto.png");
 image = ImageIO.read(url);
} catch (IOException e) {
}

// Lalu gunakan label untuk menampilkan image
JFrame frame = new JFrame();
JLabel label = new JLabel(new ImageIcon(image));
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SimpleMD5 {

   private static String convertToHex(byte[] data) {
       StringBuffer buf = new StringBuffer();
       for (int i = 0; i < data.length; i++) {
           int halfbyte = (data[i] >>> 4) & 0x0F;
           int two_halfs = 0;
           do {
               if ((0 <= halfbyte) && (halfbyte <= 9))
                   buf.append((char) ('0' + halfbyte));
               else
                   buf.append((char) ('a' + (halfbyte - 10)));

  halfbyte = data[i] & 0x0F;
           } while(two_halfs++ < 1);
       }
       return buf.toString();
   }

   public static String MD5(String text)
   throws NoSuchAlgorithmException, UnsupportedEncodingException  {
       MessageDigest md;
       md = MessageDigest.getInstance("MD5");
       byte[] md5hash = new byte[32];
       md.update(text.getBytes("iso-8859-1"), 0, text.length());
       md5hash = md.digest();
       return convertToHex(md5hash);
   }
}

String encrypted = SimpleMD5.MD5(“HMFT”);

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

/**
 *
 * @author Neutron0690
*/
public final class NetworkInfo {
public final static String ipAddress(){
 try {
     InetAddress addr = InetAddress.getLocalHost();

     // Get IP Address
     byte[] ipAddr = addr.getAddress();

     // Convert to dot representation
     String ipAddrStr = "";
     for (int i=0; iif (i > 0) {
             ipAddrStr += ".";
         }
         ipAddrStr += ipAddr[i]&0xFF;
     }

     return ipAddrStr;
 } catch (UnknownHostException e) {
     return "";
 }
}

public final static String hostName(){
 try {
     InetAddress addr = InetAddress.getLocalHost();

     // Get hostname
     String hostname = addr.getHostName();

     return hostname;
 } catch (UnknownHostException e) {
     return "";
 }
}

public final static String macAddress(){
 try {
     InetAddress address = InetAddress.getLocalHost();

     /*
             * Get NetworkInterface for the current host and then read the
             * hardware address.
             */
     NetworkInterface ni = NetworkInterface.getByInetAddress(address);
     byte[] mac = ni.getHardwareAddress();

     /*
             * Extract each array of mac address and convert it to hexa with the
             * following format 08-00-27-DC-4A-9E.
             */
     String tmp = "";
     for (int i = 0; i < tmp =" tmp" class="character">"%02X%s", mac[i], (i < class="character">"-" : "");
     }

     return tmp;
 } catch (UnknownHostException e) {
     e.printStackTrace();
     return "";
 } catch (SocketException e) {
     e.printStackTrace();
     return "";
 }
}
}