A range is a very handy feature of programing languages like Python. * range( 10 ) -> 0 1 2 3 4 5 6 7 8 9 * range( 5, 10 ) -> 5 6 7 8 9 * range( 0, 10, 3 ) -> 0 3 6 9 * range( '0', '9' ) -> 012345678 With an extended for loop it is possible to use such a feature too: /* * This project is made available under the terms of the BSD license, more information can be found at * http://www.opensource.org/licenses/bsd-license.html * * Copyright (c) 2007. Christian Ullenboom (http://www.tutego.com/) and contributors. All rights reserved. */ package com.tutego; import java.util.Iterator; /** * Class that generates immutable sequences (ranges) as Iterable * objects. A range represents a start (0 if not given), an stop (mandatory) and * an optional step (1 by default). The start value is included in the range, * the stop value is exclusive. Every range is handled by an Iterable * which can by used in an extended for loop. * * * for ( int i : range( 0, 10, 3 ) ) * System.out.print( i + " " ); // 0 3 6 9 * * * @author Christian Ullenboom (tutego) * @version 1.0 */ public class Range { public static Iterable range( final int start, final int stop, final int step ) { if ( step <= 0 ) throw new IllegalArgumentException( "step > 0 isrequired!" ); return new Iterable() { public Iterator iterator() { return new Iterator() { private int counter = start; public boolean hasNext() { return counter < stop; } public Integer next() { try { return counter; } finally { counter += step; } } public void remove() { } }; } }; } public static Iterable range( final int start, final int stop ) { return range( start, stop, 1 ); } public static Iterable range( final int stop ) { return range( 0, stop, 1 ); } } This is an example: package com.tutego; import static com.tutego.Range.range; public class RangeDemo { public static void main( String[] args ) { for ( int i : range( 10 ) ) System.out.print( i + " " ); System.out.println(); for ( int i : range( 5, 10 ) ) System.out.print( i + " " ); System.out.println(); for ( int i : range( 0, 10, 3 ) ) System.out.print( i + " " ); System.out.println(); for ( int i : range( '0', '9' ) ) System.out.print( (char) i ); System.out.println(); String[] a = { "Mary", "had", "a", "little", "lamb" }; for ( int i : range(a.length ) ) System.out.printf( "%d %s%n", i, a[i] ); } }

1 import java.security.*; 2 import java.math.*; 3 4 public class MD5 { 5 public static void main(String args[]) throws Exception{ 6 String s="This is a test"; 7 MessageDigest m=MessageDigest.getInstance("MD5"); 8 m.update(s.getBytes(),0,s.length()); 9 System.out.println("MD5: "+new BigInteger(1,m.digest()).toString(16)); 10 } 11 }

import java.net.URL; import java.io.IOException; import java.net.URLClassLoader; import java.net.MalformedURLException; public class JarFileLoader extends URLClassLoader { public JarFileLoader (URL[] urls) { super (urls); } public void addFile (String path) throws MalformedURLException { String urlPath = "jar:file://" + path + "!/"; addURL (new URL (urlPath)); } public static void main (String args []) { try { System.out.println ("First attempt..."); Class.forName ("org.gjt.mm.mysql.Driver"); } catch (Exception ex) { System.out.println ("Failed."); } try { URL urls [] = {}; JarFileLoader cl = new JarFileLoader (urls); cl.addFile ("/opt/mysql-connector-java-5.0.4/mysql-connector-java-5.0.4-bin.jar"); System.out.println ("Second attempt..."); cl.loadClass ("org.gjt.mm.mysql.Driver"); System.out.println ("Success!"); } catch (Exception ex) { System.out.println ("Failed."); ex.printStackTrace (); } } }

Here's a really simple code snippet for retrieving parameters to a Java servlet.