In my current project settings, I have configured Eclipse to place the compiled .class files in the /bin directory.
My puzzle is that, when I run the application via the IDE and get it to print the current working directory (System.out.println(System.getProperty("user.dir")) I expect the console output to be /bin - instead the value printed is the projectRoot folder (without the /bin suffix).
If I were to navigate to the /bin folder directly, and execute my java class, the current working directory is printed as I expect it to be. What I would like is the Eclipse IDE to behave similarly.
Any ideas as to why I am observing this disparity? I have gone through many project build settings, but cannot seem to find anything that would cause this anomaly.
Kind regards,
Dinuk
In Eclipse, the working directory defaults to the project directory.
You can change this in the run properties
(Project->Properties->Run/DebugSettings->Edit->Arguments tab, at the bottom of the page).
Edit: Actually, the easiest way to get to it is Run->Open Run Dialog->Arguments tab.
It's been a while since I used Eclipse.
From an example of Eclipse Setup New Project
alt text http://apps.sourceforge.net/mediawiki/sprite2d/nfs/project/s/sp/sprite2d/a/ae/EclipseNewProjectDebugArguments.jpg
Related
I upgraded to version 8.2 and my projects list disappeared. When I pointed to the folder where my java files are located, Netbeans cannot find a project file. However, in the folder reside my 2 java files and a form file.
Admittedly, I do lack a bit of Netbeans experience, and for the life of me, I cannot figure out how to import these files into a project - and be able to work with the form. Can anyone give me a pointer on how to resurrect my project?
Edited at recommendation:
When I selected "Open Project" and entered the path to where my files are located "/Users/robertbray/Documents/Robert/NetBeans/numberaddition/" In the "Project Folder" pane, nothing appears, as if the project does not exist. So, playing around this evening, I used the "Open File" method and entered the path "/Users/robertbray/Documents/Robert/NetBeans/numberaddition", now I am able to see my source files (NumberAdditionUI.java, NumberAdditionUI.form, and GraphPanel2.java) and I can open them, including the form (design). However, I cannot determine how to convert this to a project file so I can build and run the code - these options are greyed out.
Since I had the original source files, I created a new project, then moved (and renamed) the original java class/form files into the "/src" directory. Of course I had to do some changes in the java files with the new name. As s test, I modified the form and rebuilt the project. Working as expected. Many thanks to #skomisa!
I opened the Eclipse as usual from an installer (I downloaded the complete jBPM engine and Eclipse is included with it). I open it from a command prompt. When I opened the Eclipse I found it is empty as it is installed recently. no projects or tabs or anything.
I reopened the project I am working on and found that the main file that containing the code is empty (it is one line with hidden words). I opened the project from its location on the hard disk and I found the file is also empty but I can see that there is something on it.
I tried to open the project on Netbeans but the problem is still exist. I tried to open the file from the local history but I found nothing in the history. Unfortunately I didn't take a backup from my last work. I don't know what to do right now, if you can help it will be appreciated. I attached here a picture for the eclipse with the empty file:
If the project is already deployed in some server then you can decompile them from deployed folder(i.e : webapps folder of Tomcat)
I have tried all different settings, and yes, I m aware of eclipse.ini and config.ini and also tried different command line arguments! Nothing solved my problem!
All attempts and still each time I run eclipse.exe it wants write to my userhome i.e. the .eclipse and .p2 folders.
I have tried with all settings bellow among others, in different combinations too:
-Dosgi.user.area=file:/c:/eclipse-conf/e46
-Dosgi.configuration.area=file:/c:/eclipse-conf/e46
-Dosgi.instance.area=file:/c:/eclipse-conf/e46
-Declipse.p2.data.area=file:/c:/eclipse-conf/e46/p2
-Dorg.eclipse.equinox.p2.configurationFolder=file:/c:/eclipse-conf/e46/p2
-Dorg.eclipse.equinox.p2.installFolder=file:/c:/eclipse-conf/e46/p2
-Dorg.eclipse.equinox.p2.reconciler.dropins.directory=file:/c:/eclipse-conf/e46/p2
-Dorg.eclipse.equinox.p2.cache=file:/c:/eclipse-conf/e46/p2
-Dorg.eclipse.equinox.p2.roaming=file:/c:/eclipse-conf/e46/p2
-Dorg.eclipse.equinox.p2.cache.shared=file:/c:/eclipse-conf/e46/p2
This did not help! Well it writes to /e46 and /e46/p2 folder but it also creates/writes to c:\users\mrsimplemind\.eclipse & .eclipseextension & .p2
Even if I manually create the folders before it will not help.
Now please anyone here had success to fully isolate eclipse configuration output?
The only way I achieved this was by changing the user.home but I don't like this workaround as there are stuff in the original "user.home" that will be needed in eclipse, e.g. .ssh , .git , .m2 maven etc. I don't want to keep duplicates of profile settings for each eclipse user.home
I just want to isolate eclipse, this should be configurable! I don't like the outputs to user.home .. It is not an option! I want to have control of what eclipse creates in what folders, for each eclipse installation.
(I can only tell from windows os, I don't know how if Eclipse on Mac works better with the settings above)
I dont use OOMPH installer, some comments below are misleading
The method I have tried to solve this problem has been nearly successful. Whether this is an answer for you will depend on your minimum acceptable level of quality.
If you are trying to prevent your Eclipse IDE from filling up your home drive, this technique will work (it has worked for me). It should not matter if Eclipse was installed by Oomph or from a plain zip, as nothing Oomph-related is modified in this solution.
If the requirement is that the user home p2 folder can be completely deleted and yet Eclipse still works without recreating that directory, no I have not been able to achieve that yet.
I am posting this as a partial solution, perhaps in the hope someone else can build upon it to figure out a better workaround. Obviously the perfect solution would be if eclipse had a configurable download location and the installer actually installed all software to only the location selected, but that requires the Eclipse developers to fix the "P2" component of the product. What follows is only a workaround.
Strategy
The premise is that the download pool folder always seems to be hardcoded into the config files to be under the home folder of the user that ran the eclipse installer. The essence of this workaround is to create a fake user home folder in the location of your choice, do a massive find-and-replace in the config files, and then force the Java system property to use that new folder as "user.home" which fools Eclipse into using it for its downloads.
Method
This was tested on Eclipse 4.7 Oxygen.3A on Mint Linux.
Extensive brain surgery of the Eclipse installation folder is needed.
Install Eclipse somewhere other than your user's home drive.
In this example the Oomph installer was given /media/LINAPPS/ubuntu-apps/eclipse-oxy as the install target, which then creates /media/LINAPPS/ubuntu-apps/eclipse-oxy/eclipse during the installation.
Start Eclipse at least once, then close it and make sure Eclipse is not running.
Create a new fake user home drive folder underneath the Eclipse folder.
In this example I created eclipse-oxy/eclipse/fakeHome
Copy the entire (hidden) p2 directory from your user home directory into the new fakeHome.
eg cp -R /home/$USER/.p2 /media/LINAPPS/ubuntu-apps/eclipse-oxy/eclipse/fakeHome/.p2
Go to the eclipse folder and edit the eclipse.ini in a text editor. Make these 2 changes:
set the line after --launcher.library to be the copy of the pool in the new location relative to the eclipse folder, eg : fakeHome/.p2/pool/...etc...
append a new system property setting to end of the file after all the other vm arguments, and set user.home to the new fake user home directory.
eg: -Duser.home=/media/LINAPPS/ubuntu-apps/eclipse-oxy/eclipse/fakeHome
Edit the file eclipse/configuration/org.eclipse.update/platform.xml. Find the first <site> entry and change the url attribute to be the new pool folder relative to the eclipse folder. eg: url="file:fakeHome/.p2/pool/"
Edit the file /media/LINAPPS/ubuntu-apps/eclipse-oxy/eclipse/configuration/org.eclipse.equinox.simpleconfigurator/bundles.info and again find and replace all references to you user home's p2 folder with the new p2 folder under the fakeUser. You could find over 1000 matches to replace here. It again seems to be possible to make these relative to the eclipse folder, so a path of "fakeHome/.p2/pool/....." will work.
Go to the new /eclipse/fakeHome/.p2 folder and edit both of the files there "pools.info" and "profiles.info". Again find any reference to your real user home and replace it with the path to the fakeUser folder. Use the full pathname (from root) for the pool location in both of these files.
Unpack, edit, and repack the latest profileRegistry. Find the folder
eclipse/fakeHome/.p2/org.eclipse.equinox.p2.engine/profileRegistry/_media_LINAPPS_ubuntu-apps_eclipse-oxy_eclipse.profile/. Now find the latest timestamped gz file in that folder. For example it might be called "1529736854441.profile.gz".
gunzip that .gz file. Edit the .profile file and again replace any mention of your real user home with the new fakeUser folder. For example in my installation one of the first property settings had to be changed to
<property name='org.eclipse.equinox.p2.cache' value='/media/LINAPPS/ubuntu-apps/eclipse-oxy/eclipse/fakeHome/.p2/pool'/>
Delete the old gz file, then gzip the profile into a gz, so it has replaced the old one.
I also edited the file /eclipse/fakeHome/.p2/org.eclipse.equinox.p2.core/cache/artifacts.xml and replaced the repository name with a reference to the new location inside fakeHome, but I am not sure this was necessary to get eclipse working.
Start eclipse.
Results
After doing the above, I tried to add Install New Software from the Help menu. After downloading lots of new plugins from Redhat and Spring, the new fakeHome pool occupies 900MB, but the original user home pool is still less than 400MB which is what it was as soon as eclipse had been installed. So it has been successful at moving the download cache of the updater and no files get updated in the old location, but two directories under .p2 still seem to have their timestamps touched.
If anyone finds this useful, or figures out how to improve it, please let me know.
This works on Windows 7, Eclipse Oxygen:
Install Eclipse, but DON'T launch it yet
Edit eclipse.ini and, underneath -vmargs, add an entry to change user home to be a shared folder:
e.g.
-vmargs
-Duser.home=C:\Development
Launch Eclipse. Should see ".eclipse", ".tooling", etc folders created in shared folder, and nothing created under your user folder.
As of Eclipse Java 2019-06 for Windows 10 64-bit
I added my eclipse.ini below:
-vmargs
-D"user.home=C:\your_path_here"
The 3 folders of .eclipse, .p2, & .tooling appeared after I started and then closed eclipse.
I am not sure when these are written into the new path, but it worked in my Windows 10.
Did you try adding the following line to eclipse.ini below -vmargs:
-Dosgi.configuration.area=#user.home/.someFolder
which will use .someFolder instead of .eclipse
or
-Dosgi.configuration.area=C:\path_to_desired_location\.eclipseJAVA
I am using Google's Workspace Mechanic to configure my eclipse environment. All seems to work fine, except that for any fresh installation, the workspace mechanic opens up with a default location of its own (~/.eclipse/mechanic) to look for preference files.
As given in their documentation i tried including their code
(/instance/com.google.eclipse.mechanic/mechanicSourceDirectories=/shared/eclipse/tasks\:${user_homedir}/.eclipse/mechanic)
in my plugin_customization.ini , but it does not work for me.
Does anyone have any other idea as to how to achieve this?
Quite late, but I just needed the same configuration.
First locate your plugin_customization.ini (eg. 'find -name plugin_customization.ini' in your eclipse folder).
I had two files with same name, located in org.eclipse.platform and org.eclipse.epp.package.jee.
For me, the jee one was relevant and you can configure it as JSON Array.
com.google.eclipse.mechanic/mechanicSourceDirectories=["http\://server/mechanics/tasks.json","/tmp"]
This example shows how to configure a folder (/tmp) and via http location.
Under Windows, I found that when using the recent Eclipse Juno and the latest Workspace Mechanic I had to do the following:
Edit the (Java EE):
...\Eclipse_Juno_SR1\plugins\org.eclipse.epp.package.jee_1.5.1.20120828-0743\plugin_customization.ini
and add the following line at the end:
com.google.eclipse.mechanic/mechanicSourceDirectories=c:\\...\\eclipse_extensions\\WorkspaceMechanics
in order for the plugin to recognize the above directory as the shared folder...
The plugin preferences now correctly references the folder !
The documentation is for Eclipse on Linux/Unix. If you are running Eclipse on Windows you will need a different path.
Another aproch is to put the preferencces in another file and point to that file from your eclipse.ini with a line such as
-Declipse.pluginCustomization=/var/wsm/current/my.properties
or eclipse startup with
eclipse -pluginCustomization /var/wsm/current/my.properties
The following worked for me (for Eclipse Luna in Windows).
Open the Luna/plugins folder
Search for a folder that begins with org.eclipse.epp.package.
(and I ended up with org.eclipse.epp.package.java_4.4.1.20140925-1820)
Go inside that folder and edit plugin_customization.ini
Append the following at the end (to point to \\sharedserver\share\DEV\Workspace-Prefs-Luna):
#Workspace Mechanic Settings
com.google.eclipse.mechanic/mechanicSourceDirectories=\\\\\sharedserver\\share\\DEV\\Workspace-Prefs-Luna
Save and Close the file
Restart Eclipse
I am using Eclipse IDE to write code in PHP, but I used NetBeans, which is also a very good editor!, However, I came across a doubt, NetBeans, when I created a new project, it generated an nbproject folder, with figures from the netbeans, of course, are the project settings, since the eclipse, generates files in the root directory of the project, I wonder if I would do this with eclipse, when I create a project in eclipse, create it creates a directory named 'ecproject' and play the files '. buildpath', '. project', '. settings' inside this directory, so it looks organized application folder. Thank you all!
You can't. This has been discussed quite a long time ago at Eclipse (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=76695, https://bugs.eclipse.org/bugs/show_bug.cgi?id=42875 and https://bugs.eclipse.org/bugs/show_bug.cgi?id=72301)
The last one contains an interesting suggestion, though: Create another project for the .project-Files and just link your sources into that one.