Code to poll a minecraft server

Minecraft Server Poller

  private String MOTD;
  private String gameVersion; //Currently 1.5.2
	private int onlinePlayers;
	private int maxPlayers;
	
	public static String readString(DataInputStream par0DataInputStream, int par1) throws IOException
    {
        short short1 = par0DataInputStream.readShort();

        if (short1 > par1)
        {
            throw new IOException("Received string length longer than maximum allowed (" + short1 + " > " + par1 + ")");
        }
        else if (short1 < 0)
        {
            throw new IOException("Received string length is less than zero! Weird string!");
        }
        else
        {
            StringBuilder stringbuilder = new StringBuilder();

            for (int j = 0; j < short1; ++j)
            {
                stringbuilder.append(par0DataInputStream.readChar());
            }

            return stringbuilder.toString();
        }
    }

	private String allowedChars = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_'abcdefghijklmnopqrstuvwxyz{|}~⌂ÇüéâäàåçêëèïîìÄÅÉæÆôöòûùÿÖÜø£Ø׃áíóúñѪº¿®¬½¼¡«»";

	private void pollServer(String ip, int port) throws IOException
	    {
	        Socket socket = null;
	        DataInputStream datainputstream = null;
	        DataOutputStream dataoutputstream = null;

	        try
	        {
	            socket = new Socket();
	            socket.setSoTimeout(3000);
	            socket.setTcpNoDelay(true);
	            socket.setTrafficClass(18);
	            socket.connect(new InetSocketAddress(ip, port), 3000);
	            datainputstream = new DataInputStream(socket.getInputStream());
	            dataoutputstream = new DataOutputStream(socket.getOutputStream());
	            dataoutputstream.write(254);
	            dataoutputstream.write(1);

	            if (datainputstream.read() != 255)
	            {
	                throw new IOException("Bad message");
	            }

	            String s = readString(datainputstream, 256);
	            char[] achar = s.toCharArray();

	            for (int i = 0; i < achar.length; ++i)
	            {
	                if (achar[i] != 167 && achar[i] != 0 && allowedChars.indexOf(achar[i]) < 0)
	                {
	                    achar[i] = 63;
	                }
	            }

	            s = new String(achar);
	            int j;
	            int k;
	            String[] astring;

	            if (s.startsWith("\u00a7") && s.length() > 1)
	            {
	                astring = s.substring(1).split("\u0000");

	                if (Integer.parseInt(astring[0]) == 1)
	                {
	                    this.MOTD = astring[3];
	                    this.gameVersion = astring[2];
	                    j = Integer.parseInt(astring[4]);
	                    k = Integer.parseInt(astring[5]);

	                    if (j >= 0 && k >= 0)
	                    {
	                        onlinePlayers = j;
	                        maxPlayers = k;
	                    }
	                    else
	                    {
	                        //Players unknown
	                    }
	                }
	                else
	                {
	                    gameVersion = "???";
	                    MOTD = "???";
	                    onlinePlayers = -1;
	                    maxPlayers = -1;
	                }
	            }
	            else
	            {
	                astring = s.split("\u00a7");
	                s = astring[0];
	                j = -1;
	                k = -1;

	                try
	                {
	                    j = Integer.parseInt(astring[1]);
	                    k = Integer.parseInt(astring[2]);
	                }
	                catch (Exception exception)
	                {
	                    ;
	                }

	                MOTD = s;

	                if (j >= 0 && k > 0)
	                {
	                    onlinePlayers = j;
	                    maxPlayers = k;
	                }
	                else
	                {
	                        //Players unknown
	                }

	                gameVersion = "1.3";
	            }
	        }
	        finally
	        {
	            try
	            {
	                if (datainputstream != null)
	                {
	                    datainputstream.close();
	                }
	            }
	            catch (Throwable throwable)
	            {
	                ;
	            }

	            try
	            {
	                if (dataoutputstream != null)
	                {
	                    dataoutputstream.close();
	                }
	            }
	            catch (Throwable throwable1)
	            {
	                ;
	            }

	            try
	            {
	                if (socket != null)
	                {
	                    socket.close();
	                }
	            }
	            catch (Throwable throwable2)
	            {
	                ;
	            }
	        }
	    }