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Cryptography Streams: URLDigest, Java example Java code example - Click here to copy ->>>

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/* Title: Hardcore Java
* Title: Java I/O
* Second Edition: May 2006
* ISBN 10: 0-596-52750-0
* ISBN 13: 9780596527501


import java.net.*;
import java.io.*;
import java.security.*;
import java.math.*;

public class URLDigest {

  public static void main(String[] args)
   throws IOException, NoSuchAlgorithmException {

    URL u = new URL(args[0]);
    InputStream in = u.openStream();
    MessageDigest sha = MessageDigest.getInstance("SHA");
    byte[] data = new byte[128];
    while (true) {
      int bytesRead = in.read(data);
      if (bytesRead < 0) break;
      sha.update(data, 0, bytesRead);
    byte[] result = sha.digest();
    for (int i = 0; i < result.length; i++) {
      System.out.print(result[i] + " ");
    System.out.println(new BigInteger(result));



The list of classes which were used on this page you can find below. The links to Java API contain official SUN documentation about all used classes.








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