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  • What's my best approach on this simple hierarchy Java Problem?

    - by Nazgulled
    First, I'm sorry for the question title but I can't think of a better one to describe my problem. Feel free to change it :) Let's say I have this abstract class Box which implements a couple of constructors, methods and whatever on some private variables. Then I have a couple of sub classes like BoxA and BoxB. Both of these implement extra things. Now I have another abstract class Shape and a few sub classes like Square and Circle. For both BoxA and BoxB I need to have a list of Shape objects but I need to make sure that only Square objects go into BoxA's list and only Circle objects go into BoxB's list. For that list (on each box), I need to have a get() and set() method and also a addShape() and removeShape() methods. Another important thing to know is that for each box created, either BoxA or BoxB, each respectively Shape list is exactly the same. Let's say I create a list of Square's named ls and two BoxA objects named boxA1 and boxA2. No matter what, both boxA1 and boxA2 must have the same ls list. This is my idea: public abstract class Box { // private instance variables public Box() { // constructor stuff } // public instance methods } public class BoxA extends Box { // private instance variables private static List<Shape> list; public BoxA() { // constructor stuff } // public instance methods public static List<Square> getList() { List<Square> aux = new ArrayList<Square>(); for(Square s : list.values()) { aux.add(s.clone()); // I know what I'm doing with this clone, don't worry about it } return aux; } public static void setList(List<Square> newList) { list = new ArrayList<Square>(newList); } public static void addShape(Square s) { list.add(s); } public static void removeShape(Square s) { list.remove(list.indexOf(s)); } } As the list needs to be the same for that type of object, I declared as static and all methods that work with that list are also static. Now, for BoxB the class would be almost the same regarding the list stuff. I would only replace Square by Triangle and the problem was solved. So, for each BoxA object created, the list would be only one and the same for each BoxB object created, but a different type of list of course. So, what's my problem you ask? Well, I don't like the code... The getList(), setList(), addShape() and removeShape() methods are basically repeated for BoxA and BoxB, only the type of the objects that the list will hold is different. I can't think of way to do it in the super class Box instead. Doing it statically too, using Shape instead of Square and Triangle, wouldn't work because the list would be only one and I need it to be only one but for each sub class of Box. How could I do this differently and better? P.S: I could not describe my real example because I don't know the correct words in English for the stuff I'm doing, so I just used a box and shapes example, but it's basically the same.

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  • Custom CSV (.csv) filter for OpenOffice.org or LibreOffice?

    - by anon
    Is it possible to create a some kind of 'custom CSV filter' for OpenOffice.org or LibreOffice spreadsheet program. What I need is to have the program to use predefined CSV settings for loading and saving when I open, let's say file named 'somefile.myext'. Also I would need the loaded data to be placed in a prestyled spreadsheet. In this particular case, I would need the CSV settings to have tab as a field delimiter and no text delimiter at all. Prestyled spreadsheet would contain Blue gray coloring for every odd row (achieved with conditional formatting formula), some font styling and probably some column width definitions.

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  • Encrypted TrueCrypt volume in file with decoy content?

    - by penyuan
    I've been reading about the encryption features of TrueCrypt, including the feature to have an encrypted volume inside a file with any name. For example, I can create an encrypted volume inside a file named music.mp3. However, the file won't really play when I try to open it in a music player. Is there a way to add "decoy" content to music.mp3 so that someone who doesn't know its got encrypted content can double click on it and music will play? Obviously it doesn't have to be music, but also images, decoy test document, etc. etc.

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  • Script/scheduled task to clean up Dowloads folder (Windows 7)?

    - by Andrew
    My downloads folder is my primary connection to the internet (and thus the world), and has rapidly become a virtual junk drawer. I imagine I'm not alone here. What I'd like to do is have some sort of a script that -creates a new folder (named YYYY_MM Archive so it sorts nicely) -takes everything* inside of the Downloads folder (for the current user) -moves it to the new folder and have this run once/month. *(excluding previous archives) This strikes me as the type of thing Saw some answers on related questions that seemed to suggest that this is an eminently doable task in PowerShell. Is it? I'm on Windows 7 Enterprise.

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  • How can I delete permanently My Folders in Windows 7?

    - by Rubens
    How can I delete permanently My Music/My Pictures/My Videos/etc. Folders in Windows 7? If you delete this folders manually, Windows Media Player 12 recreate all of them again, again and again! It's a nightmare. Anyone knows a registry hacking to get rid of these folders forever? Note 1: I know how to disable the Libraries feature in Windows 7, but I don't want this, I want to delete only the folders named above. note2: The "folders monitored" option doesn't exist in Windows Media Player 12.

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  • How do I delete Windows.old in Windows 7?

    - by CRK
    I used to run Windows 7 32 bit, but installed the 64 bit version because of a RAM upgrade. During the installation I got this message: The partition you selected might contain files from a previous Windows installation. If it does, these files and folders will be moved to a folder named Windows.old. You will be able to access the information in Windows.old, but you will not be able to use your previous version of Windows. The C:\ drive now has two (2) Windows folders: Windows (15.3 GB) Windows.old (15.7 GB) Don't see why I need the Windows.old taking over 15GB of space on my hard drive so I tried to delete it. It didn't work. How can I safely delete this folder?

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  • Utility to take daily screenshots of a webpage

    - by Kevin L.
    I would like to have a visual history of my Tomato bandwidth graphs, so that I can roughly/manually correlate them with some other factors. Tomato can squirrel away the actual data points, but I'd rather not deal with importing it into some visualization tool. For sheer simplicity, a single image per day would be preferable. I'd like a program that can wake up at say, midnight, take a screenshot of a given webpage (the URL will always be the same), and save that image to a folder, maybe named after the date/time. I'd prefer OS X, but Windows and Linux are fair game too; I use all three. Any suggestions?

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  • Creating a list based on a column

    - by MikkoP
    I need to create a dropdown list in sheet A based on the values in sheet B in column A. I clicked on the A column in B sheet and named it as Models. Then I clicked on the cell in sheet A where I wanted the list to be and selected Data -> Data validation -> Data validation. In the Settings page I selected List in the Allow section, checked Ignore blank and In-cell dropdown. In the Source section I inserted =Models. This way I get all the right values plus a lot of blank values. How do I prevent the blank lines from appearing in the list?

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  • Character coding problem

    - by out_sider
    I have a file named index.php which using a mysql server gets a simple username. The mysql server is running on centOS and I have two different systems running apache serving as web servers. One is my own windows pc using a "wamp" solution which uses the mysql server refereed before and the other is the centOS server itself. I use this so I can develop in my laptop and run the final on the centOS box. The problem is this: Accessing centOS box I get (on hxxp://centos): out_sider 1lu?s 2oi Using wamp on windows I get (on hxxp://localhost): out_sider 1luís 2oi The mysql database is configured correctly seeing that both use the same and I used svn repository to move files from windows to centOS so the file is the same. Does anyone have any suggestions? Thanks in advnce

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  • Problem accessing MICROSOFT##SSEE database (Error: 18456, Severity: 14, State: 16.)

    - by Philipp Schmid
    After an unexpected server shutdown due to a power failure, I can no longer connect to the internal windows database MICROSOFT##SSEE which is hosting Central Admin for my SBS 2008 server. The log shows: Error: 18456, Severity: 14, State: 16. Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. [CLIENT: <named pipe>] I've tried to connect using the SQL Management studio (connecting to .pipemssql$microsoft##sseesqlquery) but no luck. The SQL Server Configuration Manager doesn't show a entry for 'Protocols for MICROSOFT##SSEE' (but shows it for 2 other database hosted on the same SQL server 2005 Express edition. I have tried to restore the master.ldf and mastlog.log files from a backup, but the issue persists.

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  • Workaround broken sudo?

    - by perreal
    I managed to break sudo by deleting the libc.so.6 sym-link in /lib. I copied the actual file and created a symbolic link with the same name under my home directory by using LD_PRELOAD=/lib/libc-2.11.3.so. At this point, all binaries linking libc are working through preload except sudo. For sudo, I need to write (and don't know why): $ /lib/ld-linux-x86-64.so.2 --library-path . /usr/bin/sudo but this gives me: $ sudo: must be setuid root Checking the permissions: $ ls -l /usr/bin/sudo $ -rwsr-xr-x 2 root root 166120 So the setuid bit is actually set. Question: I need to create a symbolic link named /lib/libc.so.6 through my active ssh connection without using sudo, or, make sudo work somehow. I don't have the root password and I can't connect through ssh anymore. Is there any other way I can get authorization?

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  • Public key repository - does this exist?

    - by allegroconmolto
    This is one of those "Surely this already exists, and if not, I damn well better build it!" moments. Here's my problem: I run a devteam, of around 10 individuals. Each of us has our own private key(s). When I go set up a new server for us, I have to import all of their keys to it. And if we start working with a contractor, I have to get his or her key too, and then import it and place it in .ssh/authorized_keys on the server. Ideally I'd like to be able to do something along the lines of: import_key allegroconmolto And it would contact a public repository of public keys, see if there was a user named allegroconmolto, and if so, import their key and add it to my authorized_keys. Adding future users would then be as simple as running import_key for them. I could then scp the authorized_keys file to all my servers and be done! This seems so obvious that I feel like it surely must exist somewhere.

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  • Networking conflict - What is the most common default computer name for Windows?

    - by John
    I recently had to change the name of my computer to log onto a public wi-fi spot, because a computer with my name was already logged on. (I asked a guy there what to do after it said there was already a computer named "(omitted)" logged on.) I've never been at a wifi spot you had to log into before. I didn't even notice what the computer's name was before. My question is what are the most common default computer names. I'm curious. How often does this sort of problem happen? (For some reason my previous post was closed as off topic - so now I included the reason I'm asking. If it's still considered off topic (networking conflicts) I'll take it elsewhere, but the other forums I know of (ehow.com, answers.yahoo.com) are full of people that couldn't begin to answer a question like this.) Thanks.

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  • Networking conflict - What is the most common default computer name for Windows?

    - by John
    I recently had to change the name of my computer to log onto a public wi-fi spot, because a computer with my name was already logged on. (I asked a guy there what to do after it said there was already a computer named "(omitted)" logged on.) I've never been at a wifi spot you had to log into before. I didn't even notice what the computer's name was before. My question is what are the most common default computer names. I'm curious. How often does this sort of problem happen? (For some reason my previous post was closed as off topic - so now I included the reason I'm asking. If it's still considered off topic (networking conflicts) I'll take it elsewhere, but the other forums I know of (ehow.com, answers.yahoo.com) are full of people that couldn't begin to answer a question like this.) Thanks.

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  • "private" directory not accessible in Apache

    - by janeden
    The directory private lives under my DocumentRoot, and despite its name, it should be accessible just like any other dir. But if I add the following RewriteRule to httpd.conf: RewriteRule ^/([^\.]+)$ /$1.html [L] Apache returns 403 for http://server/private/2201. The error log states client denied by server configuration: /private/2201.html If I then rename private to foo, or if I request 2201.html directly, the file is served: 127.0.0.1 - - [21/Nov/2011:10:24:45 +0100] "GET /private/2201 HTTP/1.1" 403 214 127.0.0.1 - - [21/Nov/2011:10:24:58 +0100] "GET /foo/2201 HTTP/1.1" 200 3068 127.0.0.1 - - [21/Nov/2011:10:27:39 +0100] "GET /private/2201.html HTTP/1.1" 200 3068 This is confusing. Is there any special rule for directories named private? If so – why does the direct request for 2201.html work (although the denied request seems to handle the same resource, at least according to the error log entry)?

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  • Restoring VM's in Hyper-V from a (somewhat) failed VSS backup...

    - by DeliriumTremens
    I attempted to do a backup of our virtualization server when moving from Hyper-V 2008 to R2. I changed the registry settings to register Hyper-V VSS with Windows Server Backup, and sent the backup on it's way while I went on to other things. Apparently the VSS portion didn't back-up the VM's like I had hoped, and after updating Windows Server and Hyper-V to R2, I was unable to restore the VM's correctly. The backup completed and I have all of the files from before the update backed up, but is there any way to restore the VM's from the backup? The vhd's all seem to have old modified dates, and when bringing the machines up from these vhd's they have very old settings. I have found a bunch of avhd files (named according to GUID), but I'm not sure if I can create a VM with the old vhd and merge the snapshots with it.

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  • How to batch rename files based on file header/metadata in Windows?

    - by Infraded
    I have a directory full of randomly named files of different types, all with no file extensions. Most are images, with some videos, and some plaintext. I've used one of the Windows versions of file to confirm the files can all be identified by their headers/metadata, but would like to automate the naming as there are roughly 2400 files. I don't care so much about the filename as much as just having the appropriate extension for it's type. Is anyone aware of a program or script that can do this?

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  • What does the red x icon mean next to a user in folder permissions (Windows 7)

    - by Scott Szretter
    In trying to debug various strange issues on a machine, I found something strange - when I go to C:\Users\administrator and get properties, security tab, it lists the users (the local admin account, system, and 'administrator' which is the domain administrator account). It all looks fine in terms of permissions (full control, etc.) compared to other machines. The one difference is there is a small red circle with an X to the left of the user icon/name. Additionally, there are various folders where it says access denied under there - for example, my documents! Even logged in as the local machine administrator account (which is not named administrator), I am unable to change the permissions - it says access denied. Any ideas what this means and how to fix it? I even tried re-joining the machine to the domain.

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  • How do I open a program via the command prompt in Windows 8?

    - by Ahmadul Hoq
    Suppose I have a program named any_program.exe and my operating system drive is C:. The location of the program is D:\Any_Folder\any_program.exe How do I start/execute that program via command prompt in Windows 8? I have tried the command line START any_program.exe, but it shows me an error that Windows cannot find 'any_program.exe'. Make sure you typed the name correctly, and then try again. By the way, it worked perfectly in Windows 7. And, if I type START notepad.exe or START firefox.exe (Firefox is not installed in C: drive), it works in Windows 8.

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  • No COM1 port on hyper-v

    - by MPX
    I just made a fresh Windows 8.1 install and am trying to set-up a VM for kernel debugging. Therefore, I need to create a serial link to debug the VM using windbg. Usually I just simply add a new COM port and use it as a named pipe. However, I can't find any way to add this hardware. There is nothing relevant on the "add hardware list". What do I need to install this port then? Thanks in advance!

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  • Finding documentation for /etc/**/*.dpkg-*

    - by intuited
    During upgrades, files with these extensions appear in /etc and its subdirectories. I gather that *.dpkg-dist contains the file that was distributed with the currently-installed version of a package, and *.dpkg-new contains the version from the version being installed, however I'd like to see the docs to be sure that I'm getting it right. Also there are occasionally other similarly named files, eg *.dpkg-original, and I'd like to be able to read up on these. I've checked /usr/share/doc/dpkg for documentation on this, and come up empty; there's no dpkg-doc package; Google doesn't have anything except unanswered questions. Can someone point me to the documentation for this aspect of debian package management?

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  • Why do I get a PHP 5.2.6 segmentation fault when using PDO_SQlite?

    - by danieltalsky
    This is an installation on ModWest's shared hosting. I have enabled both PDO and PDO_sqlite on the server and phpinfo() verifies both are running. When I access PDO itself, I'm fine, and getting a meaningful error. <?php $dbh = new PDO(""); ?> This gives me an "Invalid Connection String" error. But, as soon as I begin a connection string with sqlite:, I get a total crash. When I run via the webserver, I'm seeing NO error. When I enter a nonexistant filename, PHP does indeed create the file. I tried running the constructor via CLI and there I do get a simple error: Segmentation Fault I'm not seeing ANYTHING in the PHP 5.2.6 changelogs about this bug. Anyone have any additional troubleshooting steps? The OS is Debian 5.0.4

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  • postfix + mysql, user unknown

    - by stoned
    I have installed postfix with dovecot and postfix admin and all seemed well at the beginning. I can log in with thunderbird and check the mailboxes (all empty now) and TRY to send mail, even TLS works. The problem comes when I try to send mail. This is the output of mail.log when I try to send mail from an address to the same address: Nov 23 16:41:55 mailforge postfix/local[6322]: 297792467C: to=, relay=local, delay=0.01, delays=0/0/0/0.01, dsn=5.1.1, status=bounced (unknown user: "test") Nov 23 16:41:55 mailforge postfix/qmgr[6293]: 297792467C: removed To me it looks like as if postfix tries to look for the user "test" while in the mysql database users are named as [email protected] . Where should I change this behaviour?

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  • Remove folder structure from archive, ignore folder while archiving and fix error

    - by Michael
    I am trying to make a script to backup each of my plesk hosts to individual files, I am having two problems: I would like to remove the folder structure from archive, the tar is 3 folders deep I am getting this error: tar: Removing leading `/' from member names I need my archive to ignore folders named "catch" because I don't need them in my archive. The code: FILES=/var/www/vhosts/* FNAME="" for f in $FILES do FNAME=`basename $f` tar cfv "/root/backup/ftp/$FNAME.tar" $f done Sample output: tar: Removing leading `/' from member names /var/www/vhosts/mydomain.com/ /var/www/vhosts/mydomain.com/conf /var/www/vhosts/mydomain.com/etc/ /var/www/vhosts/mydomain.com/etc/group /var/www/vhosts/mydomain.com/etc/termcap /var/www/vhosts/mydomain.com/etc/passwd /var/www/vhosts/mydomain.com/usr/

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  • Reset disk does not work for different model of computer

    - by dato
    I've created a reset USB disk on my HP computer, with Windows 7 Ultimate 32-bit, and it works fine. However, it does not work for Acer computers (notebooks too), so what is the problem here? I've have created it for the same user named user, and the password is exactly the same as well. Is it possible to show the language bar with a keyboard shortcut at the logon screen in Windows 7? I know I can do it through Control Panel, but I can't log into the system. When I click Reset Passwword, it shows me my USB flash drive and says that the password hint is on this USB drive. Then I click Next and type the new passwword, then confirm this new password, but an error dialog is shown. It says that an error occured when trying to change the password for this user-

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