Task: Rosetta Code_Rank languages by popularity
C#: using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;

class Program
{
    static void Main(string[] args)
    {
        string get1 = new WebClient().DownloadString("http:
        string get2 = new WebClient().DownloadString("http:

        ArrayList langs = new ArrayList();
        Dictionary<string, int> qtdmbr = new Dictionary<string, int>();

        MatchCollection match1 = new Regex("\"title\":\"Category:(.+?)\"").Matches(get1);
        MatchCollection match2 = new Regex("title=\"Category:(.+?)\">.+?</a>[^(]*\\((\\d+) members\\)").Matches(get2);

        foreach (Match lang in match1) langs.Add(lang.Groups[1].Value);

        foreach (Match match in match2)
        {
            if (langs.Contains(match.Groups[1].Value))
            {
                qtdmbr.Add(match.Groups[1].Value, Int32.Parse(match.Groups[2].Value));
            }
        }

        string[] test = qtdmbr.OrderByDescending(x => x.Value).Select(x => String.Format("{0,3} - {1}", x.Value, x.Key)).ToArray();

        int count = 1;

        foreach (string i in test)
        {
            Console.WriteLine("{0,3}. {1}", count, i);
            count++;
        }
    }
}

Java: import  java.net.URL;
import  java.net.URLConnection;
import  java.io.*;
import  java.util.*;

public class GetRCLanguages
{
    
    
    private static class LanguageComparator implements Comparator<String>
    {
        public int compare( String a, String b )
        {
            
            int result = ( b.charAt( 0 ) - a.charAt( 0 ) );
            if( result == 0 )
            {
                
                result = a.compareTo( b );
            } 
        return result;
        } 
    } 

    
    private static String after( String text, int marker )
    {
        String result = "";
        int    pos    = text.indexOf( marker );
        if( pos >= 0 )
        {
            
            result = text.substring( pos + 1 );
        } 
    return result;
    } 

    
    
    public static void parseContent( String path
                                   , String[] gcmcontinue
                                   , ArrayList<String> languageList
                                   )
    {
        try
        {

            URL            url = new URL( path );
            URLConnection  rc  = url.openConnection();
            
            rc.setRequestProperty( "User-Agent", "" );
            BufferedReader bfr = new BufferedReader( new InputStreamReader( rc.getInputStream() ) );
    
            gcmcontinue[0]      = "";
            String languageName = "?";
            String line         = bfr.readLine();
            while( line != null )
            {
                line = line.trim();
                if     ( line.startsWith( "[title]" ) )
                {
                    
                    languageName = after( line, ':' ).trim();
                }
                else if( line.startsWith( "[pages]" ) )
                {
                    
                    String pageCount = after( line, '>' ).trim();
                    if( pageCount.compareTo( "Array" ) != 0 )
                    {
                        
                        languageList.add( ( (char) Integer.parseInt( pageCount ) ) + languageName );
                        languageName = "?";
                    } 
                }
                else if( line.startsWith( "[gcmcontinue]" ) )
                {
                    
                    gcmcontinue[0] = after( line, '>' ).trim();
                } 
                line = bfr.readLine();
            } 
            bfr.close();
        }
        catch( Exception e )
        {
            e.printStackTrace();
        } 
    } 

    public static void main( String[] args )
    {
        
        ArrayList<String> languageList = new ArrayList<String>( 1000 );
        String[]          gcmcontinue  = new String[1];
        gcmcontinue[0]                 = "";
        do
        {
            String path = ( "http:
                          + "&generator=categorymembers"
                          + "&gcmtitle=Category:Programming%20Languages"
                          + "&gcmlimit=500"
                          + ( gcmcontinue[0].compareTo( "" ) == 0 ? "" : ( "&gcmcontinue=" + gcmcontinue[0] ) )
                          + "&prop=categoryinfo"
                          + "&format=txt"
                          );
            parseContent( path, gcmcontinue, languageList );
        }
        while( gcmcontinue[0].compareTo( "" ) != 0 );
        
        String[] languages = languageList.toArray(new String[]{});
        Arrays.sort( languages, new LanguageComparator() );
        
        int    lastTie    = -1;
        int    lastCount  = -1;
        for( int lPos = 0; lPos < languages.length; lPos ++ )
        {
            int    count = (int) ( languages[ lPos ].charAt( 0 ) );
            System.out.format( "%4d: %4d: %s\n"
                             , 1 + ( count == lastCount ? lastTie : lPos )
                             , count
                             , languages[ lPos ].substring( 1 )
                             );
            if( count != lastCount )
            {
                lastTie   = lPos;
                lastCount = count;
            } 
        } 
    } 
}