Why Do We need Host Entries in drivers-- etc--Host?
What does host entries do with opening the Froms?
user574397 wrote:
Hi,
If We are not entering any entries for an application(12.0.6)..It is not opening...Just Need details about significance of Host Entries....Searched in Google did not find an answer and hence posted a thread....What is the error you get?
The entries in the hosts file are required for the application to function properly -- Please see these docs for details.
Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.1.1) for Linux x86 [ID 761564.1]
Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.1.1) for Linux x86-64 [ID 761566.1]
Thanks,
Hussein
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PeterYou can assing one there, and / or on dialer interfaces. It depends on what you are doing.
These will be the address used by PPP when it runs on the B-channels. -
Why blocking sites using Hosts file isn't working?
Hello
I need to block a few websites on my home computer. Did a quick search and found out I had to work with the hosts files. So opened up Notepad, ran it as Admin and then opened Hosts and at the bottom added ' 127.0.0.1 facebook.com' then saved the file. But
facebook is still opening when I go to the page.
can someone tell me why using the Hosts file isn't working?
I did read somewhere that it might have something to do with security features on my system. FYI, I m using a trial version of Norton Anti Virus and I am running a Windows 7 machine.
Thanks. Any help would be appreciated.Are you sure your entry was in fact saved to the hosts file? The hosts file on my computer blocks unwanted sites.
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”
Yes
This is a copy paste of CMD.exe. It shows what's in the host files.
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\mehdi>cd C:\windows\system32\drivers\etc
C:\Windows\System32\drivers\etc>dir \a-d
Volume in drive C is Gateway
Volume Serial Number is B291-A8C6
Directory of C:\
File Not Found
C:\Windows\System32\drivers\etc>dir /a-d
Volume in drive C is Gateway
Volume Serial Number is B291-A8C6
Directory of C:\Windows\System32\drivers\etc
10/23/2010 01:06 PM 846 hosts
06/10/2009 02:00 PM 3,683 lmhosts.sam
06/10/2009 02:00 PM 407 networks
06/10/2009 02:00 PM 1,358 protocol
06/10/2009 02:00 PM 17,463 services
5 File(s) 23,757 bytes
0 Dir(s) 936,919,461,888 bytes free
C:\Windows\System32\drivers\etc>type hosts
# Copyright (c) 1993-2009 Microsoft Corp.
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
# For example:
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost
127.0.0.1 facebook.com
C:\Windows\System32\drivers\etc> -
Why do i need udev+udisks+udisks2+gvfs installed to dynamic mount?
hi there,
yes, i have used the search function on that, but still have unanswered questions.
1.
why do i need udev+udisks+udisks2+gvfs installed to dynamically mount internal (ntfs, ext4) partitions ?
If one these packages is missing, mounting an internal drive with "pcmanfm" is not possible.
I know how to static mount these drives via "fstab", but i want to mount them when i need the access.
2.
why are my removable devices not automatically mounted in "pcmanfm" when plugged in?
I have another OS (Lubuntu) running and this automatically recognizes when a cd is inserted or a usb stick is plugged in.
I have tried to install the package "gvfs-afc" and rebooted, still no usb stick to see. But when i enter:
sudo blkid -c /dev/null
The usb stick is listed as "sdb1"
I am using 64bit arch linux 3.9.3-1 with openbox+lxde.jasonwryan wrote:
You don't. You need udev for a whole lot of other stuff, so leave that aside. To automount removable media, you can just use udisks and a helper like ud{iskie,evil}.
For an ntfs partition, you will also need that driver.
Comparing it with the Lubuntu; I am sure there is a lot more cruft preinstalled that makes this happen. In Arch, you just install what you need.
The udev page has the details.
so i have uninstalled the gvfs+udisks2 packages, rebooted and installed udevil-git and rebooted again.
No partition is shown in the filemanager now. I really dont get it. The udev wiki says udev needs rules but my "/etc/udev/rules.d" folder is empty.
The udisks wiki says that udisks and udisks2 are incompatible and that only one is needed and that udisks2 should be installed for gnome systems and udisks for xfce, but i have lxde installed. So it is not working with udisks and lxde (pcmanfm), when i try to install udisks2 additionally, it also does not work. Uninstalling udisks is also not possible because of the dependancy to libfm and so on...
Here is my /etc/udevil/udevil-user-harry.conf:
# udevil configuration file /etc/udevil/udevil.conf
# This file controls what devices, networks, and files users may mount and
# unmount via udevil (set suid).
# IMPORTANT: IT IS POSSIBLE TO CREATE SERIOUS SECURITY PROBLEMS IF THIS FILE
# IS MISCONFIGURED - EDIT WITH CARE
# Note: For greater control for specific users, including root, copy this
# file to /etc/udevil/udevil-user-USERNAME.conf replacing USERNAME with the
# desired username (eg /etc/udevil/udevil-user-jim.conf).
# Format:
# OPTION = VALUE[, VALUE, ...]
# DO NOT USE QUOTES except literally
# Lines beginning with # are ignored
# To log all uses of udevil, set log_file to a file path:
#log_file = /var/log/udevil.log
# Approximate number of days to retain log entries (0=forever, max=60):
log_keep_days = 10
# allowed_types determines what fstypes can be passed by a user to the u/mount
# program, what device filesystems may be un/mounted implicitly, and what
# network filesystems may be un/mounted.
# It may also include the 'file' keyword, indicating that the user is allowed
# to mount files (eg an ISO file). The $KNOWN_FILESYSTEMS variable may
# be included to include common local filesystems as well as those listed in
# /etc/filesystems and /proc/filesystems.
# allowed_types_USERNAME, if present, is used to override allowed_types for
# the specific user 'USERNAME'. For example, to allow user 'jim' to mount
# only vfat filesystems, add:
# allowed_types_jim = vfat
# Setting allowed_types = * does NOT allow all types, as this is a security
# risk, but does allow all recognized types.
# allowed_types = $KNOWN_FILESYSTEMS, file, cifs, smbfs, nfs, curlftpfs, ftpfs, sshfs, davfs, tmpfs, ramfs
allowed_types = $KNOWN_FILESYSTEMS, file, ntfs, vfat
# allowed_users is a list of users permitted to mount and unmount with udevil.
# Wildcards (* or ?) may be used in the usernames. To allow all users,
# specify "allowed_users=*". UIDs may be included using the form UID=1000.
# For example: allowed_users = carl, UID=1000, pre*
# Also note that permission to execute udevil may be limited to users belonging
# to the group that owns /usr/bin/udevil, such as 'plugdev' or 'storage',
# depending on installation.
# allowed_users_FSTYPE, if present, is used to override allowed_users when
# mounting or unmounting a specific fstype (eg nfs, ext3, file).
# Note that when mounting a file, fstype will always be 'file' regardless of
# the internal fstype of the file.
# For example, to allow only user 'bob' to mount nfs shares, add:
# allowed_users_nfs = bob
# The root user is NOT automatically allowed to use udevil in some cases unless
# listed here (except for unmounting anything or mounting fstab devices).
allowed_users = harry, root
# allowed_groups is a list of groups permitted to mount and unmount with
# udevil. The user MUST belong to at least one of these groups. Wildcards
# or GIDs may NOT be used in group names, but a single * may be used to allow
# all groups.
# Also note that permission to execute udevil may be limited to users belonging
# to the group that owns /usr/bin/udevil, such as 'plugdev' or 'storage',
# depending on installation.
# allowed_groups_FSTYPE, if present, is used to override allowed_groups when
# mounting or unmounting a specific fstype (eg nfs, ext3, file). For example,
# to allow only members of the 'network' group to mount smb and nfs shares,
# use both of these lines:
# allowed_groups_smbfs = network
# allowed_groups_nfs = network
# The root user is NOT automatically allowed to use udevil in some cases unless
# listed here (except for unmounting anything or mounting fstab devices).
allowed_groups = storage
# allowed_media_dirs specifies the media directories in which user mount points
# may be located. The first directory which exists and does not contain a
# wildcard will be used as the default media directory (normally /media or
# /run/media/$USER).
# The $USER variable, if included, will be replaced with the username of the
# user running udevil. Wildcards may also be used in any directory EXCEPT the
# default. Wildcards will not match a /
# allowed_media_dirs_FSTYPE, if present, is used to override allowed_media_dirs
# when mounting or unmounting a specific fstype (eg ext2, nfs). For example,
# to cause /media/network to be used as the default media directory for
# nfs and ftpfs mounts, use these two lines:
# allowed_media_dirs_nfs = /media/network, /media, /run/media/$USER
# allowed_media_dirs_ftpfs = /media/network, /media, /run/media/$USER
# NOTE: If you want only the user who mounted a device to have access to it
# and be allowed to unmount it, specify /run/media/$USER as the first
# allowed media directory.
# IMPORTANT: If an allowed file is mounted to a media directory, the user may
# be permitted to unmount its associated loop device even though internal.
# INCLUDING /MNT HERE IS NOT RECOMMENDED. ALL ALLOWED MEDIA DIRECTORIES
# SHOULD BE OWNED AND WRITABLE ONLY BY ROOT.
allowed_media_dirs = /media, /run/media/$USER
# allowed_devices is the first criteria for what block devices users may mount
# or unmount. If a device is not listed in allowed_devices, it cannot be
# un/mounted (unless in fstab). However, even if a device is listed, other
# factors may prevent its use. For example, access to system internal devices
# will be denied to normal users even if they are included in allowed_devices.
# allowed_devices_FSTYPE, if present, is used to override allowed_devices when
# mounting or unmounting a specific fstype (eg ext3, ntfs). For example, to
# prevent all block devices containing an ext4 filesystem from being
# un/mounted use:
# allowed_devices_ext4 =
# Note: Wildcards may be used, but a wildcard will never match a /, except
# for "allowed_devices=*" which allows any device. The recommended setting is
# allowed_devices = /dev/*
# WARNING: ALLOWING USERS TO MOUNT DEVICES OUTSIDE OF /dev CAN CAUSE SERIOUS
# SECURITY PROBLEMS. DO NOT ALLOW DEVICES IN /dev/shm
allowed_devices = /dev/*
# allowed_internal_devices causes udevil to treat any listed block devices as
# removable, thus allowing normal users to un/mount them (providing they are
# also listed in allowed_devices).
# allowed_internal_devices_FSTYPE, if present, is used to override
# allowed_internal_devices when mounting or unmounting a specific fstype
# (eg ext3, ntfs). For example, to allow block devices containing a vfat
# filesystem to be un/mounted even if they are system internal devices, use:
# allowed_internal_devices_vfat = /dev/sdb*
# Some removable esata drives look like internal drives to udevil. To avoid
# this problem, they can be treated as removable with this setting.
# WARNING: SETTING A SYSTEM DEVICE HERE CAN CAUSE SERIOUS SECURITY PROBLEMS.
# allowed_internal_devices =
# allowed_internal_uuids and allowed_internal_uuids_FSTYPE work similarly to
# allowed_internal_devices, except that UUIDs are specified instead of devices.
# For example, to allow un/mounting of an internal filesystem based on UUID:
# allowed_internal_uuids = cc0c4489-8def-1e5b-a304-ab87c3cb626c0
# WARNING: SETTING A SYSTEM DEVICE HERE CAN CAUSE SERIOUS SECURITY PROBLEMS.
# allowed_internal_uuids =
# forbidden_devices is used to prevent block devices from being un/mounted
# even if other settings would allow them (except devices in fstab).
# forbidden_devices_FSTYPE, if present, is used to override
# forbidden_devices when mounting or unmounting a specific fstype
# (eg ext3, ntfs). For example, to prevent device /dev/sdd1 from being
# mounted when it contains an ntfs filesystem, use:
# forbidden_devices_ntfs = /dev/sdd1
# NOTE: device node paths are canonicalized before being tested, so forbidding
# a link to a device will have no effect.
forbidden_devices =
# allowed_networks determines what hosts may be un/mounted by udevil users when
# using nfs, cifs, smbfs, curlftpfs, ftpfs, or sshfs. Hosts may be specified
# using a hostname (eg myserver.com) or IP address (192.168.1.100).
# Wildcards may be used in hostnames and IP addresses, but CIDR notation
# (192.168.1.0/16) is NOT supported. IP v6 is supported. For example:
# allowed_networks = 127.0.0.1, 192.168.1.*, 10.0.0.*, localmachine, *.okay.com
# Or, to prevent un/mounting of any network shares, set:
# allowed_networks =
# allowed_networks_FSTYPE, if present, is used to override allowed_networks
# when mounting or unmounting a specific network fstype (eg nfs, cifs, sshfs,
# curlftpfs). For example, to limit nfs and samba shares to only local
# networks, use these two lines:
# allowed_networks_nfs = 192.168.1.*, 10.0.0.*
# allowed_networks_cifs = 192.168.1.*, 10.0.0.*
allowed_networks = *
# forbidden_networks and forbidden_networks_FSTYPE are used to specify networks
# that are never allowed, even if other settings allow them (except fstab).
# NO REVERSE LOOKUP IS PERFORMED, so including bad.com will only have an effect
# if the user uses that hostname. IP lookup is always performed, so forbidding
# an IP address will also forbid all corresponding hostnames.
forbidden_networks =
# allowed_files is used to determine what files in what directories may be
# un/mounted. A user must also have read permission on a file to mount it.
# Note: Wildcards may be used, but a wildcard will never match a /, except
# for "allowed_files=*" which allows any file. For example, to allow only
# files in the /share directory to be mounted, use:
# allowed_files = /share/*
# NOTE: Specifying allowed_files_FSTYPE will NOT work because the fstype of
# files is always 'file'.
allowed_files = *
# forbidden_files is used to specify files that are never allowed, even if
# other settings allow them (except fstab). Specify a full path.
# Note: Wildcards may be used, but a wildcard will never match a /, except
# for "forbidden_files = *".
# NOTE: file paths are canonicalized before being tested, so forbidding
# a link to a file will have no effect.
forbidden_files =
# default_options specifies what options are always included when performing
# a mount, in addition to any options the user may specify.
# Note: When a device is present in /etc/fstab, and the user does not specify
# a mount point, the device is mounted with normal user permissions using
# the fstab entry, without these options.
# default_options_FSTYPE, if present, is used to override default_options
# when mounting a specific fstype (eg ext2, nfs).
# The variables $USER, $UID, and $GID are changed to the user's username, UID,
# and GID.
# FOR GOOD SECURITY, default_options SHOULD ALWAYS INCLUDE: nosuid,noexec,nodev
# WARNING: OPTIONS PRESENT OR MISSING CAN CAUSE SERIOUS SECURITY PROBLEMS.
default_options = nosuid, noexec, nodev, noatime
default_options_file = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, ro
# mount iso9660 with 'ro' to prevent mount read-only warning
default_options_iso9660 = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, ro, utf8
default_options_udf = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
default_options_vfat = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID, utf8
default_options_msdos = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID
default_options_umsdos = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID
default_options_ntfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, utf8
default_options_cifs = nosuid, noexec, nodev, uid=$UID, gid=$GID
default_options_smbfs = nosuid, noexec, nodev, uid=$UID, gid=$GID
default_options_sshfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, nonempty, allow_other
default_options_curlftpfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, nonempty, allow_other
default_options_ftpfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
default_options_davfs = nosuid, noexec, nodev, uid=$UID, gid=$GID
default_options_tmpfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
default_options_ramfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
# allowed_options determines all options that a user may specify when mounting.
# All the options used in default_options above must be included here too, or
# they will be rejected. If the user attempts to use an option not included
# here, an error will result. Wildcards may be used.
# allowed_options_FSTYPE, if present, is used to override allowed_options
# when mounting a specific fstype (eg ext2, nfs).
# The variables $USER, $UID, and $GID are changed to the user's username, UID,
# and GID.
# If you want to forbid remounts, remove 'remount' from here.
# WARNING: OPTIONS HERE CAN CAUSE SERIOUS SECURITY PROBLEMS - CHOOSE CAREFULLY
allowed_options = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID, ro, rw, sync, flush, iocharset=*, utf8, remount
allowed_options_nfs = nosuid, noexec, nodev, noatime, ro, rw, sync, remount, port=*, rsize=*, wsize=*, hard, proto=*, timeo=*, retrans=*
allowed_options_cifs = nosuid, noexec, nodev, ro, rw, remount, port=*, user=*, username=*, pass=*, password=*, guest, domain=*, uid=$UID, gid=$GID, credentials=*
allowed_options_smbfs = nosuid, noexec, nodev, ro, rw, remount, port=*, user=*, username=*, pass=*, password=*, guest, domain=*, uid=$UID, gid=$GID, credentials=*
allowed_options_sshfs = nosuid, noexec, nodev, noatime, ro, rw, uid=$UID, gid=$GID, nonempty, allow_other, idmap=user, BatchMode=yes, port=*
allowed_options_curlftpfs = nosuid, noexec, nodev, noatime, ro, rw, uid=$UID, gid=$GID, nonempty, allow_other, user=*
allowed_options_ftpfs = nosuid, noexec, nodev, noatime, ro, rw, port=*, user=*, pass=*, ip=*, root=*, uid=$UID, gid=$GID
# mount_point_mode, if present and set to a non-empty value, will cause udevil
# to set the mode (permissions) on the moint point after mounting If not
# specified or if left empty, the mode is not changed. Mode must be octal
# starting with a zero (0755).
# mount_point_mode_FSTYPE, if present, is used to override mount_point_mode
# when mounting a specific fstype (eg ext2, nfs).
# NOT SETTING A MODE CAN HAVE SECURITY IMPLICATIONS FOR SOME FSTYPES
mount_point_mode = 0755
# don't set a mode for some types:
mount_point_mode_sshfs =
mount_point_mode_curlftpfs =
mount_point_mode_ftpfs =
# Use the settings below to change the default locations of programs used by
# udevil, or (advanced topic) to redirect commands to your scripts.
# When substituting scripts, make sure they are root-owned and accept the
# options used by udevil (for example, the mount_program must accept --fake,
# -o, -v, and other options valid to mount.)
# Be sure to specify the full path and include NO OPTIONS or other arguments.
# These programs may also be specified as configure options when building
# udevil.
# THESE PROGRAMS ARE RUN AS ROOT
# mount_program = /bin/mount
# umount_program = /bin/umount
# losetup_program = /sbin/losetup
# setfacl_program = /usr/bin/setfacl
# validate_exec specifies a program or script which provides additional
# validation of a mount or unmount command, beyond the checks performed by
# udevil. The program is run as a normal user (if root runs udevil,
# validate_exec will NOT be run). The program is NOT run if the user is
# mounting a device without root priviledges (a device in fstab).
# The program is passed the username, a printable description of what is
# happening, and the entire udevil command line as the first three arguments.
# The program must return an exit status of 0 to allow the mount or unmount
# to proceed. If it returns non-zero, the user will be denied permission.
# For example, validate_exec might specify a script which notifies you
# of the command being run, or performs additional steps to authenticate the
# user.
# Specify a full path to the program, with NO options or arguments.
# validate_exec =
# validate_rootexec works similarly to validate_exec, except that the program
# is run as root. validate_rootexec will also be run if the root user runs
# udevil. If both validate_exec and validate_rootexec are specified,
# validate_rootexec will run first, followed by validate_exec.
# The program must return an exit status of 0 to allow the mount or unmount
# to proceed. If it returns non-zero, the user will be denied permission.
# Unless you are familiar with writing root scripts, it is recommended that
# rootexec settings NOT be used, as it is easy to inadvertently open exploits.
# THIS PROGRAM IS ALWAYS RUN AS ROOT, even if the user running udevil is not.
# validate_rootexec =
# success_exec is run after a successful mount, remount, or unmount. The
# program is run as a normal user (if root runs udevil, success_exec
# will NOT be run).
# The program is passed the username, a printable description of what action
# was taken, and the entire udevil command line as the first three arguments.
# The program's exit status is ignored.
# For example, success_exec might run a script which informs you of what action
# was taken, and might perform further actions.
# Specify a full path to the program, with NO options or arguments.
# success_exec =
# success_rootexec works similarly to success_exec, except that the program is
# run as root. success_rootexec will also be run if the root user runs udevil.
# If both success_exec and success_rootexec are specified, success_rootexec
# will run first, followed by success_exec.
# Unless you are familiar with writing root scripts, it is recommended that
# rootexec settings NOT be used, as it is easy to inadvertently open exploits.
# THIS PROGRAM IS ALWAYS RUN AS ROOT, even if the user running udevil is not.
# success_rootexec =
I have no idea what to do next, the only way it works, is the combination i mentioned in the title of this post. Any suggestion to solve that problem? -
Why do I need a serial number to run photoshop when I just purchased a cloud subscription?
Just paid for a monthly photoshop subscription, but it's telling me I need a serial number to run it and doesn't seem to be recognizing that I already paid for it? The transaction went through fine, I got a confirmation email saying I bought it.
Anyone know what to do in this situation? Thanks.may be the subscription is not activated yet.
However , we will try with 2 steps.
First we will check with Hosts file .
1)Navigate to C:\Windows\System32\drivers\etc and look for file named hosts inside etc folder.
2)Copy the hosts file to Desktop and open the same with notepad.
Let me know whether you can see Any Adobe related entries inside ? -
Archiving cds and why do i need id3 tags
here comes another one of those questions looking at which codec to use to store music.....i also have tag questions.....
i'm about to (re-)rip my cd collection and looking at some info re codecs and id3 tags
now.....i believe i understand the benefits of alac (lower file sizes, keeping id3 tags, lossless compression) v wav(no compression)
however (and for some out there) if we just entertain the fact that wav may have some minute benefit for me depending on my questions and answers given.....and yes i know wav and alac will sound the same to the human ear - i accept that as a given of lossless compression ......
points i'd like to outline:
i am looking to rip my cds, firstly and mostly, for an archiving purpose!! purpose numero uno!!
i could well want to re-create cds with these archived records in the future
size of files is of no concern to me at all
i'm using a mac nowadays
i will convert most of these files, where needed, to use with a portable music player (i'm not bothered with having, say a wav file and then also converting and having an alac file, as crazy as that sounds)
this is where i ask for info re the benefits of embedded tags that are found in alac:
are these tags that important?
where do they come into play in ripping and later converting music?
are these uses just bells and whistles that have no benefit to my needs?
if i rip cds to wav (or aiff), say, using itunes, will cd info and track listings be available on the downloading database (eg itunes) to name these wav files?
if i then ensure these song files are kept under the album's folder, have i just done what tags do? surely not. that is all i have needed in the past.
this is where i feel i may be really missing what id tags (can) do
are tags more than just managing song files and where they belong and where they have come from?
is it just a convenience of not personally managing your song files (as per previous paragraph)?
(in the past i had ripped cds to mp3 codec. i think i used "cd rip" or something like that on my pc.
my mp3 files were individually named and sorted and kept under album folders under artist name folders.
apart form the very odd occasion all track and album info i needed was found on a database that was attached to the ripping software.
i never had a problem managing/maintaining these files and folders.)
i welcome some enlightenment on some of my questions above and other info that may be relevant
and yes, i understand that music will sound the same as a wav file or alac file - but humour me re using wav and tell me why i need id3 tags
i guess the crux of it is:
why do i need id3 tags?
does my managing of my song file in the album folder do what tags do?
what problems/shortcomings/headaches may i encounter by not having those tags if i use wav as opposed to alac?
what do i not know about these little buggers?
what codec is best for my purpose of archiving and re creating of cds (for playing in cd players)
thanks in advance for your input and any clarity that i may experience through this
peter t
excuse my long windedness (i have spent some time editing this entry)Crows2012 wrote:
as mentioned earlier if i just have songs (wav) in album folders, when i import these albums into itunes, do you know if these will come up under AN album with their file names purely using my filename setup (but with no artwork)?
Yes, iTunes will read the filename, such as "Track 1" or something else and display it. But nothing else. No Album or Artist.
so the tracks will remain grouped as an album based on their initial folder and the albums and tracks as per file name?
Crows2012 wrote:
also, does aiff have limitations (apart from the full size of the file)?
I'm not sure I understand what you mean. For all practical purposes AIFF and WAV are exactly the same thing. They're just file containers.
i thought that i had read somewhere that aiff tags could run into some issues with its tags - ie may not always be transferred 100% accurately with certain players (or hardware maybe)
Crows2012 wrote:
and how do these codecs work re-creating an album for the purposes of playing in a cd player? - this is a crucial question for the purpose of my archiving/backup of CDs THEMSELVES
That's actually going to depend on what burning software you use. Once you rip the tracks to whatever file container you choose (WAV/AIFF/ALAC) you'll never really exactly re-create the album. But for archiving purposes all three file containers will do what you want, which is to create a lossless archive. AIFF has the advantage of supporting embedded ID3, which ALAC has the additional advantage of the files also being about half the size of AIFF/WAV files.
i was thinking that maybe wav was able to recreate an album (in effect duplicate one) if my cd was lost or damaged in the future. i was thinking this IF when ripping to wav everything is unchanged (unless there is other data on the original cd). and maybe only possible with wav. the purpose for this would be to play recreated cds on my cd player
any idea on this one?
(i havent looked too thoroughly on this angle but i'll keep googling on this one)
much appreciate all info thus far
peter t -
Why do I need to catch this exception?
Hello all
This is a question about exception handling. I have to build a diary application that lets you save reminders on particular dates using xml. Just to make it a little tougher, I was not allowed to use the Calendar class. This is the code I wrote:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
import javax.xml.parsers.*;
import org.xml.sax.*;
import java.io.*;
import org.w3c.dom.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import static java.lang.Math.*;
public class CalendarAssignment extends JFrame implements ActionListener
int MonthLength [] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
public JButton [] days = new JButton[43];
private JLabel lbl, reminderlbl;
private JPanel top, grid, remindercenter, reminderbottom;
private JFrame reminderframe;
private JTextField year1, reminderinput, dayno;
private JComboBox months;
private Container container;
private JButton fetch, save, cancel;
private Document doc;
private File file;
private Node node;
private String year, month, day;
public static void main( String[] args ) {
CalendarAssignment c = new CalendarAssignment( );
c.setSize( 400, 300 );
c.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
c.show( );
public CalendarAssignment( ) {
int CurrentYear, CurrentMonth;
String YearString, MonthString, Now;
Date today;
container = getContentPane( );
container.setLayout( new BorderLayout( ) );
SimpleDateFormat DateFormatter;
DateFormatter = new SimpleDateFormat( "MM.yyyy" );
today = new Date( );
Now = DateFormatter.format( today );
MonthString = Now.substring( 0,2 );
YearString = Now.substring( 3,7 );
CurrentMonth = Integer.valueOf( MonthString );
CurrentYear = Integer.valueOf( YearString );
top = new JPanel( );
String [] items = { "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November",
"December" };
months = new JComboBox( items );
months.setEditable( false );
months.setSelectedIndex( CurrentMonth - 1 );
year1 = new JTextField( );
year1.setText( YearString );
year1.setEditable( true );
year1.setHorizontalAlignment( year1.CENTER );
fetch = new JButton( "Fetch Month" );
fetch.addActionListener( this );
top.setLayout( new GridLayout( 1, 3, 20, 0 ) );
top.add( months );
top.add( year1 );
top.add( fetch );
grid = new JPanel( );
grid.setLayout( new GridLayout( 7, 7, 0, 0 ) );
String [] week = { "Mon", "Tue", "Wed", "Thur", "Fri", "Sat", "Sun" };
for ( int a = 0; a < 7; a ++ ) {
JLabel lbl = new JLabel( week[a], JLabel.CENTER );
grid.add( lbl );
for ( int i = 0; i < 42; i ++ ) {
days[i] = new JButton( );
grid.add( days[i] );
days.addActionListener( this );
DrawCalendar( CurrentMonth, CurrentYear );
container.add( top, BorderLayout.NORTH );
container.add( grid, BorderLayout.CENTER );
private void DrawCalendar( int SelectMonth, int SelectYear ) {
int DisplayMonthLength, Buttons;
String ButtonID = "";
int OffSet = MonthStart( SelectMonth, SelectYear );
DisplayMonthLength = MonthLength [SelectMonth - 1];
if ( SelectMonth == 2 )
DisplayMonthLength += LeapYear( SelectYear );
for ( Buttons = 1; Buttons < 43; Buttons ++ ) {
if ( ( Buttons <= OffSet ) || ( Buttons > ( DisplayMonthLength + OffSet ) ) ) {
ButtonID = "";
days[Buttons-1].setEnabled( false );
else {
ButtonID = Integer.toString( Buttons - OffSet );
days[Buttons-1].setEnabled( true );
days[Buttons-1].setLabel( ButtonID );
grid.add( days[Buttons-1] );
private int LeapYear( int year ) {
int FourHundred, OneHundred, Fourth;
FourHundred = year % 400;
OneHundred = year % 100;
Fourth = year % 4;
if( ( ( FourHundred == 0 ) ) || ( ( OneHundred != 0 ) && ( Fourth == 0 ) ) )
return ( 1 );
else
return ( 0 );
private int MonthStart( int Month, int Year ) {
int OffSet, LastMonths, BeforeOrAfter, Years;
int AllDays = 0;
int YearDays = 365;
int YearMonths = 12;
BeforeOrAfter = Year - 2006;
Years = abs( BeforeOrAfter );
if( BeforeOrAfter != 0 )
BeforeOrAfter = BeforeOrAfter / Years;
switch( BeforeOrAfter ) {
case 1:
for( int a = 2006; a < Year; a ++ ) {
AllDays += YearDays + LeapYear( a );
AllDays += LastMonthsCalc( Month, Year );
break;
case -1:
for( int a = 2005; a > Year; a -- ) {
AllDays += YearDays + LeapYear( a );
for( LastMonths = YearMonths; LastMonths >= Month; LastMonths -- ) {
AllDays += MonthLength[LastMonths - 1];
if( LastMonths == 2 )
AllDays += LeapYear( Year );
break;
default:
if( Month > 1 )
AllDays += ( LastMonthsCalc( Month, Year ) );
OffSet = AllDays % 7;
if( BeforeOrAfter ==( -1 ) )
return( 6 - OffSet );
else if( OffSet > 0 )
return( OffSet - 1 );
else
return( 6 );
private int LastMonthsCalc( int Month, int Year ) {
int Counter;
int days = 0;
for( Counter = 1; Counter < Month; Counter ++ ) {
days += MonthLength[Counter - 1];
if( Counter == 2 )
days += LeapYear( Year );
return( days );
public void CreateReminder( String buttonID, String yearID, String monthID ) {
reminderframe = new JFrame( );
reminderlbl = new JLabel( );
reminderframe.setLayout( new GridLayout( 2, 1, 0, 0 ) );
remindercenter = new JPanel( );
reminderlbl = new JLabel( "Please type in reminder to be saved for " + buttonID + " " + monthID + " " + yearID + ":", JLabel.CENTER );
reminderinput = new JTextField( 30 );
reminderinput.setHorizontalAlignment( reminderinput.CENTER );
reminderinput.setEditable( true );
remindercenter.setLayout( new GridLayout( 2, 1, 0, 0 ) );
remindercenter.add( reminderlbl );
remindercenter.add( reminderinput );
reminderbottom = new JPanel( );
save = new JButton( "Save" );
save.addActionListener( this );
cancel = new JButton( "Cancel" );
cancel.addActionListener( this );
dayno = new JTextField( buttonID );
dayno.setEditable( false );
dayno.setEnabled( false );
dayno.show( false );
reminderbottom.setLayout( new FlowLayout( ) );
reminderbottom.add( save );
reminderbottom.add( cancel );
reminderbottom.add( dayno );
reminderframe.setSize( 500, 75 );
reminderframe.add( remindercenter );
reminderframe.add( reminderbottom );
reminderframe.pack( );
reminderframe.show( );
public void SaveReminder( String dayID, String yearID, String monthID ) throws Exception {
file = new File( "Diary.xml" );
doc = DocumentBuilderFactory.newInstance( ).newDocumentBuilder( ).parse( file.toURL( ).toString( ) );
String year = yearID;
String month = monthID;
String day = dayID;
//System.out.println( year );
//System.out.println( month );
//System.out.println( day );
CreateEntry( doc.getDocumentElement( ) );
writeXmlFile( );
public boolean CreateEntry( Node node ) {
Node searchNode;
searchNode = getYear( node );
if( searchNode == null ) {
Element newNode = doc.createElement( "Year" );
searchNode = node.appendChild( newNode );
newNode.setAttribute( "Id", year );
node = searchNode;
searchNode = getMonth( node );
if( searchNode == null ) {
Element newNode = doc.createElement( "Month" );
searchNode = node.appendChild( newNode );
newNode.setAttribute( "Id", month );
node = searchNode;
searchNode = getDay( node );
if( searchNode == null ) {
Element newNode = doc.createElement( "Day" );
searchNode = node.appendChild( newNode );
newNode.setAttribute( "Id", day );
node = searchNode;
String entry = reminderinput.getText( );
Node textNode = doc.createTextNode( entry );
node.appendChild( textNode );
return true;
private Node getYear( Node node ) {
node = node.getFirstChild( );
while( node != null ) {
if(node.getNodeName( ).equals( "Year" ) && String.valueOf( node.getAttributes( ).item( 0 ).getNodeValue( ) ) == year )
return node;
node = node.getNextSibling( );
return null;
private Node getMonth( Node node ) {
node = node.getFirstChild( );
while( node != null ) {
if( node.getNodeName( ).equals( "Month" ) && String.valueOf( node.getAttributes( ).item( 0 ).getNodeValue( ) ) == month )
return node;
node = node.getNextSibling( );
return null;
private Node getDay( Node node ) {
node = node.getFirstChild( );
while( node != null ) {
if( node.getNodeName( ).equals( "Day" ) && String.valueOf( node.getAttributes( ).item( 0 ).getNodeValue( ) ) == day )
return node;
node = node.getNextSibling( );
return null;
private void writeXmlFile( ) throws Exception {
Source source = new DOMSource( doc );
Result result = new StreamResult( file );
Transformer xformer = TransformerFactory.newInstance( ).newTransformer( );
xformer.setOutputProperty( OutputKeys.INDENT,"yes" );
xformer.setOutputProperty( OutputKeys.DOCTYPE_SYSTEM,"Diary.dtd" );
xformer.transform( source, result );
public void actionPerformed( ActionEvent e ) {
String IDButton = e.getActionCommand( );
String IDYear = year1.getText( );
Object IDMonthObj = months.getSelectedItem( );
if( e.getSource( ) == fetch ) {
String YearText = year1.getText( );
int YearNumber = Integer.valueOf( YearText );
int MonthsIndex = months.getSelectedIndex( ) + 1;
DrawCalendar( MonthsIndex, YearNumber );
else if( e.getSource( ) == cancel ) {
reminderframe.hide( );
else if( e.getSource( ) == save ) {
String IDDay = dayno.getText( );
String IDMonth = String.valueOf( IDMonthObj );
SaveReminder( IDDay, IDYear, IDMonth );
else {
String IDMonth = String.valueOf( IDMonthObj );
Toolkit.getDefaultToolkit( ).beep( );
int n = JOptionPane.showConfirmDialog( null, "Set reminder on this date?", "Question", JOptionPane.YES_NO_OPTION );
if( n == JOptionPane.YES_OPTION ) {
CreateReminder( IDButton, IDYear, IDMonth );
If you compile it, you will realise that I get an error about exception handling. My lecturer gave me an example code of how to do the same thing without using a GUI:
import javax.xml.parsers.*;
import org.xml.sax.*;
import java.io.*;
import java.util.*;
import org.w3c.dom.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
public class CallDOM
Document doc;
File file;
Scanner input;
int year, month, day;
String currentYear, currentMonth;
public static void main(String args[]) throws Exception
CallDOM cd=new CallDOM();
CallDOM() throws Exception
file=new File("Diary.xml");
//create DOM from file
doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(file.toURL().toString());
input=new Scanner(System.in);
System.out.println("1) Create entry");
System.out.println("2) Read entry");
System.out.println("3) Show Diary");
System.out.println("4) Quit");
int choice=input.nextInt();
while(choice!=4)
switch(choice)
case 1: GetDate();CreateEntry(doc.getDocumentElement());break;
case 2: GetDate();ReadEntry(doc.getDocumentElement());break;
case 3: ShowDiary(doc.getDocumentElement());
System.out.println("1) Create entry");
System.out.println("2) Read entry");
System.out.println("3) Show Diary");
System.out.println("4) Quit");
choice=input.nextInt();
writeXmlFile();
public void GetDate()
System.out.println("Enter date (dd mm yyyy)");
day=input.nextInt();
month=input.nextInt();
year=input.nextInt();
public boolean ReadEntry(Node node)
node = getYear(node);
if(node==null) return false;
node = getMonth(node);
if(node==null) return false;
node = getDay(node);
if(node==null) return false;
node = node.getFirstChild();
while(node!=null)
System.out.println(node.getNodeValue().trim());
node=node.getNextSibling();
return true;
public boolean CreateEntry(Node node)
Node searchNode;
searchNode = getYear(node);
if(searchNode==null)
Element newNode = doc.createElement("Year");
searchNode = node.appendChild(newNode);
newNode.setAttribute("Id",Integer.toString(year));
node = searchNode;
searchNode = getMonth(node);
if(searchNode==null)
Element newNode = doc.createElement("Month");
searchNode = node.appendChild(newNode);
newNode.setAttribute("Id",Integer.toString(month));
node = searchNode;
searchNode = getDay(node);
if(searchNode==null)
Element newNode = doc.createElement("Day");
searchNode = node.appendChild(newNode);
newNode.setAttribute("Id",Integer.toString(day));
node = searchNode;
System.out.println("Enter Text");
String entry=input.next();
entry+=input.nextLine();
Node textNode = doc.createTextNode(entry);
node.appendChild(textNode);
return true;
public void ShowDiary(Node node)
Stack<Node> stack=new Stack<Node>();
Node child;
stack.push(node);
while(!stack.empty())
node = stack.pop();
if(ProcessNode(node))
child = node.getLastChild();
while(child!=null)
stack.push(child);
child = child.getPreviousSibling();
private boolean ProcessNode(Node node)
if(node.getNodeName().equals("Year"))
currentYear=node.getAttributes().item(0).getNodeValue();
if(node.getNodeName().equals("Month"))
currentMonth=node.getAttributes().item(0).getNodeValue();
if(node.getNodeName().equals("Day"))
System.out.print(node.getAttributes().item(0).getNodeValue()+"/"+
currentMonth+"/"+currentYear+": ");
node=node.getFirstChild();
while(node!=null)
System.out.println(node.getNodeValue().trim());
node=node.getNextSibling();
return false;
return true;
private Node getYear(Node node)
node=node.getFirstChild();
while(node!=null)
if(node.getNodeName().equals("Year")
&& Integer.valueOf(node.getAttributes().item(0).getNodeValue())==year)
return node;
node = node.getNextSibling();
return null;
private Node getMonth(Node node)
node=node.getFirstChild();
while(node!=null)
if(node.getNodeName().equals("Month")
&& Integer.valueOf(node.getAttributes().item(0).getNodeValue())==month)
return node;
node = node.getNextSibling();
return null;
private Node getDay(Node node)
node=node.getFirstChild();
while(node!=null)
if(node.getNodeName().equals("Day")
&& Integer.valueOf(node.getAttributes().item(0).getNodeValue())==day)
return node;
node = node.getNextSibling();
return null;
private void writeXmlFile() throws Exception
Source source = new DOMSource(doc);
Result result = new StreamResult(file);
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.setOutputProperty(OutputKeys.INDENT,"yes");
xformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,"Diary.dtd");
xformer.transform(source, result);
}My question is, why does the exceptions in the example code not need to be caught? And why do I have to catch the exceptions in my code? Several exceptions are thrown in the example code, but there is no catch statement.
Thanks for any advice!!Since your question didn't come with any relevant details, and since you have huge steaming piles of irrelevant code, all I can give is a general answer to "Why do I need to catch this exception?"
[url http://java.sun.com/docs/books/tutorial/essential/exceptions/index.html]Exception tutorial at http://java.sun.com/docs/books/tutorial/essential/exceptions/index.html
Here's a quick overview of exceptions:
The base class for all exceptions is Throwable. Java provides Exception and Error that extend Throwable. RuntimeException (and many others) extend Exception.
RuntimeException and its descendants, and Error and its descendants, are called unchecked exceptions. Everything else is a checked exception.
If your method, or any method it calls, can throw a checked exception, then your method must either catch that exception, or declare that your method throws that exception. This way, when I call your method, I know at compile time what can possibly go wrong and I can decide whether to handle it or just bubble it up to my caller. Catching a given exception also catches all that exception's descendants. Declaring that you throw a given exception means that you might throw that exception or any of its descendants.
Unchecked exceptions (RuntimeException, Error, and their descendants) are not subject to those restrictions. Any method can throw any unchecked exception at any time without declaring it. This is because unchecked exceptions are either the sign of a coding error (RuntimeException), which is totally preventable and should be fixed rather than handled by the code that encounters it, or a problem in the VM, which in general can not be predicted or handled. -
Below, you see a netcat list of my hosts. Most are answering port 5900, but not 2179. The list on the bottom is answering 2179, but not 5900. I need to know for 3 reason why this is, (1) to setup our enterprise firewall, (2) for port health
monitoring of our hosts, and (3) just what is going on. I thought that 2179 should be open on all hosts, and that 5900 was only used in legacy cases (at least from what I read from googling around). Why aren't all of my hosts answering 2179?
My hosts are all Server 2008 R2 Datacenter SP1 64-bit. We have a mix of VMs with Server 2008 R2, Win7, and RHEL6, all 64-bit.
Most answering 5900...
[lhco-mshv01] Connection to lhco-mshv01 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv02] Connection to lhco-mshv02 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv03]
[lhco-mshv05] Connection to lhco-mshv05 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv06]
[lhco-mshv07]
[lhco-mshv08] Connection to lhco-mshv08 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv09] Connection to lhco-mshv09 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv10]
[lhco-mshv11] Connection to lhco-mshv11 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv12] Connection to lhco-mshv12 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv13] Connection to lhco-mshv13 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv14] Connection to lhco-mshv14 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv16]
[lhco-mshv17]
[lhco-mshv18] Connection to lhco-mshv18 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv19] Connection to lhco-mshv19 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv20]
[lhco-mshv21]
[lhco-mshv22] Connection to lhco-mshv22 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv23] Connection to lhco-mshv23 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv24] Connection to lhco-mshv24 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv25] Connection to lhco-mshv25 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv26] Connection to lhco-mshv26 5900 port [tcp/vnc-server] succeeded!
[lhco-mshv27] Connection to lhco-mshv27 5900 port [tcp/vnc-server] succeeded!
The others are answering 2179...
[lhco-mshv01]
[lhco-mshv02]
[lhco-mshv03] Connection to lhco-mshv03 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv05]
[lhco-mshv06] Connection to lhco-mshv06 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv07] Connection to lhco-mshv07 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv08]
[lhco-mshv09]
[lhco-mshv10] Connection to lhco-mshv10 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv11]
[lhco-mshv12]
[lhco-mshv13]
[lhco-mshv14]
[lhco-mshv16] Connection to lhco-mshv16 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv17] Connection to lhco-mshv17 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv18]
[lhco-mshv19]
[lhco-mshv20] Connection to lhco-mshv20 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv21] Connection to lhco-mshv21 2179 port [tcp/vmrdp] succeeded!
[lhco-mshv22]
[lhco-mshv23]
[lhco-mshv24]
[lhco-mshv25]
[lhco-mshv26]
[lhco-mshv27]Brian,
This is specifically related to Hyper-V hosts, where the following ports may be used by the VMM to communicate to each host:
VMConnect (RDP) to Hyper-V hosts 2179
VMRC connection to Virtual Server host 5900
These ports are outlined here...
technet.microsoft.com/en-us/library/cc764268.aspx
I am not running independent VNC servers on my hosts. They are VMRC ports. My confusion is why some of my hosts are only answering 2179, while the others are only answering 5900, but not both ports on all hosts (or for that matter just 2179 on
all hosts). -
Need host string for xp machine (oracle 10.1.1..2)
Hi: my email address is [email protected] need host string or how to get information for host string.
Thank You
wayneHi
You can find the connectString under
ORACLE_HOME\..\NETWORK\ADMIN\tnsnames.ora file.
You should be able to see an entry that will look like this
ABC =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = XXXX)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ORCL)
Here ABC is your connectString hence to connect to the database you will issue
SYSTEM/MANAGER@ABC
where SYSTEM=>USERNAME
MANAGER=>PASSWORD
ABC=>ConnectString
Hope it helps.
Rgds
Adnan -
Why do we need private static method or member class
Dear java gurus,
I have a question about the use of private and static key words together in a method or inner class.
If we want to hide the method, private is enough. a private static method is sure not intended to be called outside the class. So the only usage I could see is that this private static method is to be called by another static method. For inner class, I see the definition of Entry inner class in java.util.Hashtable, it is static private. I don't know why not just define it as private. Could the static key word do anything better.
Could anybody help me to clear this.
Thanks,What don't you get? Private does one thing, andstatic does >something completely different.
If you want to listen to music, installing an airconditioner doesn't help>
Hi, if the private keyword is the airconditioner, do
you think you could get music from the static keyword
(it acts as the CD player) in the following codes:You're making no sense and you're trying to stretch the analogy too far.
Private does one thing. If you want that thing, use private.
Static does something completely different and unrelated. If you want that thing, use static.
If you want both things, use private static.
What do you not understand? How can you claim that you understand that they are different, and then ask, "Why do we need static if we have private"? That question makes no sense if you actually do understand that they're different. -
Why do we need to Register a class ?
When the class is already present in jar file then still why do we need to load the class and use it. The jar file is included in the lib and would be available for the environment.
If any better explanation is provided will be very useful
Thanking you in advanceI assume you are talking about JDBC drivers over here. In general, otherwise you do not need to register classes.
In JDBC, this has to do with how DriverManager works.
When you load a driver class using the Class.forName(...) block, you are effectively executing the driver's static block.
The static block has some code in it to register the class with the DriverManager by calling the static method DriverManager.register(Driver d).
When your client code attempts to connect to a database by passing a JDBC-URL, the DriverManager iterates through the registered drivers and calls acceptsURL() on each of the drivers. The first driver to return a value of true gets to try connecting to the database. -
Why do you need a copy of my wife's social security CARD?
My wife tried to move from her parents family share plan to her own plan. Already a Verizon customer, she was asked to fax her social security CARD to corporate verizon. When asked why her card is needed and not all others who sign up, she was told this was a "Random" policy, like being selected at TSA. This did not make her feel very comfortable in sharing such personal information. Is anyone able to provide a better answer as to why her card is needed? She has excellent credit and is already a customer! If she gets no answer, she is going to AT&T.
She does not have an issue providing her social security number in order to perform the background check- she did so. The issue we are having it that she was then told that she needed to fax her drivers license and social security card in order to complete the credit check. When she asked why, the answer was "just because". She asked if everyone had to do this, and was told no. So she asked why SHE in particular needed to, and no one could answer that question. She does not feel comfortable doing this, and she should not have to if it's not required of everyone.
She would like to be able to set up her account without faxing her social security card, like many other people are able to. Can you please let me know who we can contact to make that happen? -
Why do I need to change permissions on files I upload?
I have used the same hosting service for a few years, and just uploaded some files using CS6. For some reason, the files that were uploaded did not have the right permissions on them and I had to right click on them on the server and set the permissions on them by checking the box for "Everyone" under the Read column. Three times I clicked on the "Read All" button and all of the files on the server side of the FTP window disappeared, I lost my ability to connect to the server, and nothing showed up when I went to my domain name in 3 different browsers and my phone. My web host says they are not sure why it may have done this.
1. Why do I need to set the permissions for my HTML files this way?
2. Is this the right way to do this? OR is there some other way I should be doing this?
3. Any idea what the issue I experienced with my files disappearing was caused by?
Thanks.This was a known bug experienced by a handful of people.
Make sure you have all the latest updates for DW CS6.
http://www.adobe.com/support/dreamweaver/downloads_updaters.html
Nancy O. -
TS4431 Why do I need 4.7 GB of storage to upload a 995 MB iOS 8.0.2?
Why do I need 4.7 GB of storage to upload a 995 MB iOS 8.0.2?
<Re-Titled By Host>Once the file has been downloaded, it has to be unpacked (unzipped, dearchived, whatever term you want to use), and it requires that extra space for that purpose.
My personal suggestion is to use a computer with iTunes to download and install the update, as OTA updates occasionally result in Recovery mode due to errors. -
Why do I need consolekit or dbus?
I currently run DWM as my window manager, and the last line of my .xinitrc is:
exec ~/scripts/startdwm
I see a lot of others have something to the effect of:
exec ck-launch-session dbus-launch --sh-syntax --exit-with-session ~/.bin/startdwm
What is the purpose of this? What am I missing out on by not starting with consolekit or dbus? What is the best practice?jasonwryan wrote:There are wiki pages on both of these: please research topics before asking questions here:
I did some research before coming here. My initial post was not very descriptive, and for that I apologize. Let me try to explain myself better.
In the quest to learn more about the dark corners of my Arch Linux machine, I'm picking out components and learning more about them. Currently in the hot-seat are dbus & consolekit. I'll break down my experience so far with each of them separately, [hopefully] for the benefit of clarity.
dbus
As do most archers, I started out with the Beginner's guide. Here is what it says about dbus:
Arch Wiki wrote:Note: dbus is likely required for many of your applications to work properly, if you know you do not need it, skip this section
In other words, "just install dbus 'cause you probably need it". I had no idea whether or not I needed it, so I just installed it, as was recommended. However, I'd like to note that this seems to deviate with The Arch Way. The arch way stresses simplicity and code correctness over convenience, so to ask the user to install something without explaining why seems out of place. The more typical approach throughout the wiki is to explain why, like "install mesa for 3D support" or "install alsa-mixer to control sound".
Next, looking at the dbus Arch Wiki entry, it's clear that dbus is a system for easy inter-process communication, but I still have no idea why almost everyone needs to install it. Won't apps requiring dbus for IPC have dependencies on dbus, and then install and use dbus like any other dependency? If not, don't I need to know what common applications use dbus, as well as how and why they do so? This is where my confusion lies.
ConsoleKit
The Arch Wiki ConsoleKit entry explains:
Arch Wiki wrote:ConsoleKit is a framework for managing user sessions, and permissions.
What is not done already that ConsoleKit solves with its session management? What does ConsoleKit do with permissions that isn't handled by either the Linux kernel or sudo/su/chmod/etc...?
The ConsoleKit Official documentation comically avoids answering this:
ConsoleKit Documentation wrote:
Defining the Problem
To be written.
The Arch Wiki ConsoleKit entry further explains:
Arch Wiki wrote:Some of the most common usages of ConsoleKit is allowing non-root users to mount removable media, and suspending/shutting down the computer through common desktop applications (ie: thunar, nautilus, the gnome shutdown menu, etc).
Why is this better than just using sudo for mounting media and shutting down / restarting? If I can do some cool stuff with ConsoleKit managing my X sessions, sign me up, but tell me what I can do & where to start.
If there is nothing new that ConsoleKit does, and some apps just arbitrarily decided to use it as opposed to more common components for certain functionality, then how do I know that before using those apps? If it's just guess and check that's fine, but I feel like I'm missing something here.
Also, is there a best-practice way to launch several apps under consoleKit, as opposed to this "dirty workaround":
Arch Wiki wrote:A dirty workaround is to have the entire session started by a second script (don't forget dbus-launch, it's likely you need it too).
And again with the "you probably need dbus" without explaining why.
My poorly-thought out original post begged to be dismissed with a "google it". Hopefully I have better explained myself, and someone can point me in the right direction. If I've just stupidly missed something basic (most likely the case, I'm somewhat new to all of this), have mercy on me and kindly point me in the right direction.
Thanks!
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