Noobish 2 Error

protected void readTCPPacket(SelectionKey key)
    {
        MMOConnection con = (MMOConnection)key.attachment();
        MMOClient client = con.getClient();
        ByteBuffer buf;
        if((buf = con.getReadBuffer()) == null)
            buf = READ_BUFFER;
        int result = -2;
        if(buf.position() == buf.limit())
        {
            System.err.println((new StringBuilder()).append("POS ANTES SC.READ(): ").append(buf.position()).append(" limit: ").append(buf.limit()).toString());
            System.err.println((new StringBuilder()).append("NOOBISH ERROR ").append(buf != READ_BUFFER ? "temp" : "READ_BUFFER").toString());
            System.exit(0);
        }
        try
        {
            result = con.getReadableByteChannel().read(buf);
        }
        catch(IOException e) { }
        if(result > 0)
        {
            if(!con.isClosed())
            {
                buf.flip();
                while(tryReadPacket2(key, client, buf));
            } else
            if(buf == READ_BUFFER)
                READ_BUFFER.clear();
        } else
        if(result == 0)
        {
            System.out.println((new StringBuilder()).append("Atemp to hack server with ZERO packet from IP: ").append(con.getSocket().getInetAddress().getHostAddress()).toString());
            con.onForcedDisconnection();
            closeConnectionImpl(con);
        } else
        if(result == -1)
        {
            closeConnectionImpl(con);
        } else
        {
            con.onForcedDisconnection();
            closeConnectionImpl(con);
        }
    }