I downloaded the ALFA plugin for eclipse and followed the instructions in the alfa-install-plugin.pdf that was included in the zip archive. It seemed to install OK.
However, when I pasted the example snippet of ALFA into an example file (test.alfa), as per the instructions, it failed to "compile" successfully. The Attributes.subjectId == “alice” term was underlined in red. This occurs even though the provided standard-attributes.alfa and system.alfa files are both present in the same src directory as test.alfa.
I think the plugin should have found the definition of Attributes.subjectId in standard-attributes.alfa but clearly this did not happen.
Details of my setup:
ubuntu 15.10 64-bit
Eclipse version: eclipse-dsl-kepler-SR2 (64-bit)
ALFA-1.0-update-site.zip (current)
Oracle java version: 1.8.0_66
Note that alfa was tested on eclipse Kepler (64-bit) on Ubuntu 12.10, which is now at end of life.
I tried several possibilities, but all had the same problem: using the Java developer (not the DSL-specific) version, using different alfa snippets, using a Java eclipse project but not a basic eclipse project, renaming standard-attributes.alfa to Attributes.alfa (to match its namespace), ...
I wonder whether other users have encountered this problem, and if so, how they fixed it!
Thank you.
Unfortunately ALFA Eclipse plugin v 1.0 does not work with the Kepler release of Eclipse. Things changed a lot internally in the plugin architecture of Kepler and hence you will need to use v 1.0.2 of the plugin.
I recently had to reset my PC and I get this error after relaunching Eclipse:
No editor descriptor for id org.python.pydev.editor.PythonEditor
I tried searching for a solution but others like
here have been caused by upgrading Eclipse. I'm new to Eclipse and programming in general. Any help will be appreciated. Thank you.
Update Java 11 now required for PyDev. Rest of answer preserved as still relevant.
Two things to check:
Check that you are running Java 7 or greater and newish Eclipse. From PyDev requirements:
Requirements
Java 7: Important: If you don't have java 7, the update process may
appear to succeed, but PyDev will simply not show in the target
installation. See PyDev does not appear after install! below for
details on how to fix that. At least one of:
Python (2.2 or newer) Jython (2.2 or newer) IronPython (2.6 or newer)
and
Eclipse (3.8/4.3 onwards) Note if using Eclipse standalone: Python and
IronPython require only the Platform Runtime Binary (download around
45-50 MB), and Jython also requires JDT.
Make sure you have PyDev appears properly installed:
Help menu
Installation Details
Plug-ins tab
type pydev in the filter box (see below)
check that PyDev is installed
If PyDev is not installed, and you have met the requirements, try installing it again from http://pydev.org/updates Update Site:
Help menu
Install New Software
Put http://pydev.org/updates in the Work With box and press Enter (see screenshot below)
Select PyDev in the list
Complete the wizard
Restart Eclipse when prompted, and voila (I hope!) you have PyDev working again.
If your problem is not resolved with the above, please provide more details in the question
Currently (January 2022) the update the eclipse to the newest https://download.eclipse.org/releases/2021-12/ and https://download.eclipse.org/releases/latest helped, but also Java 11 (I'm using Oracle Java at Ubuntu 18) was required. At the webpage of PyDev the minimal versions are given.
I just installed Eclipse Kepler (after an issue with a faulty update in Juno) and tried to install PyDev using the Install New Software option in Eclipse. Basically just following memory/online tutorials. After installing I can't see it in my Preferences pane. Any ideas why that might be so?
Thanks.
Yes, I have Java 7 installed.
UPDATE: A lot of users have suggested numerous solutions to this problem. There may be more than one correct answer below. See what helps you...
Too much!
After wasting 4 hours trying to install PyDev 3, I moved back to 2.8.2 and used the drop in technique instead of Add new software and it now works!
Download 2.8.2 from sourceforge
http://sourceforge.net/projects/pydev/files/pydev/
Uninstall PyDev.
Simply unzip the contents into the dropins folder below eclipse.
Restart eclipse.
After struggling with this problem for some days I wanted to share my solution to the problem - inspired by the above posts (kudo's to them).
My Configuration:
MacBook Air (intel) with OS X 10.9
Eclipse: Kepler SR1 installed (zip file extracted in the Applications folder)
My situation:
Tried to install PyDev via Eclipse Help --> Install new software...
Installation was succesfull, but PyDev didn't show up anywhere in Eclipse.
My solution:
In Eclipse go to Help --> Install new software...
Uncheck "Show only the latest versions of available software"
Select PyDev the usual way, but install the latest 2.x version instead of the 3.x version
Apparently PyDev 3.0 does not work with the default OS X configuration of Eclipse, Java and Python (don't exactly know why, though...)
I just figured it out.
You will need JDK rather than a JRE.
Download it here first:JDK Download
Install it.
Explore /Applications/eclipse/Eclipse.app/Contents/MacOS (where you put your Eclipse)
Open eclipse.ini
add
-vm
/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/bin/java
You will change the version according to your situation.
Enjoy!
It happened to me too, but using Debian stable (wheezy, in my case).
I solved installing doing:
# apt-get install openjdk-7-jdk
After this, I checked that I had two alternatives of Java JDK:
# update-java-alternatives -l
And the output was:
java-1.6.0-openjdk-amd64 1061 /usr/lib/jvm/java-1.6.0-openjdk-amd64
java-1.7.0-openjdk-amd64 1051 /usr/lib/jvm/java-1.7.0-openjdk-amd64
Finally, I did:
# update-java-alternatives -s java-1.7.0-openjdk-amd64
After that, I removed pydev plugin from Eclipse, reboot Eclipse, install pydev (using Marketplace), reboot Eclipse, and now it works.
Credits:
http://vas.davimas.name/2013/07/switching-between-openjdk-v6-and-v7-in.html and Richard's answer, above
Most likely you do not have java 7 or > eclipse 3.7 installed on your machine it is a requirement of pyDev 3 see here http://pydev.blogspot.co.uk/2013/11/pydev-30.html
The PyDev.org website states (http://pydev.org/manual_101_install.html) --
"""
Important requisite
PyDev now requires java 7 in order to run. If you don't have java 7, the update
process may appear to succeed, but PyDev will simply not show in the target
installation. Please double-check if you're using a java 7 vm in
about > installation details > configuration
before trying to install PyDev.
"""
This problem started to appear in my Eclipse after I removed the Java 7 runtime from my system (because the Java code I am building needs to run on an older version of Java, but that's unrelated). After I realized that I had lost PyDev, I reinstalled Java 7 and PyDev is working fine now.
Another option would be to rollback to the previous version of PyDev that does not require Java 7, but it would require a manual installation of PyDev and I would lose the convenience of automated updates. The best way forward, it seems, to run run Eclipse on Java 7 and switch those Java projects that need to depend explicitly on Java 6 to that JDK/JRE.
How I was able to get pydev to work in mac/eclipse is download the latest JDK as mention 100 times above install it and then do the following.
open eclipse choose preferences > java > installed JREs
click on "Search..." button it will auto populate the JDK 1.7 you just installed
Click ok
have a beer!
-Cheers!
Solved.
OSX Mavericks 10.9, Eclipse Keplar 4.3.2, PyDev 3.4
Problem: PyDev not showing up under Ecplise > preferences
Solution: Download, install and point Ecplise to JDK 1.7
Unistall PyDev
Under Eclipse > preferences > Installed JREs you probably only see Java SE 6
Download and install JDK 1.7 from http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
open terminal and run "/usr/libexec/java_home -v 1.7"
this will return the directory in which JDK 1.7 reside, something like /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home
Under Eclipse > preferences > Installed JREs click "add", select "MacOS X VM", click "next"
in JRE Home paste your version of /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home, give it a name and click "Finish"
Restart Eclipse and re-install PyDev.
Voila!
I had the same issue on Luna and found my mistake.
After checking the author in "Do you trust these certificates?" page, and I was able to successfully install pydev.
The page lets you proceed without checking it, and no error occurs and it was where I totally missed. Maybe it is useful for someone.
You can move back to 2.x.x:
Eclipse -> About Eclipse then click "Installation Details" button.
From "Installation History" tab choose last installation.
Click Revert button.
You will go back to chosen installation.
I managed to get the following to work with Eclipse IDE for Java Developers 4.4.1 Luna on OS X 10.9.5 Mavericks:
Download and install the latest version of the JDK (currently Java SE 8u25) from http://www.oracle.com/technetwork/java/javase/downloads/index.html. (Not the JRE!)
Navigate to /Applications/eclipse/Eclipse.app/Contents/MacOS (or wherever you have Eclipse installed) and open eclipse.ini.
Append the following to the bottom of the file (be sure to replace the version number with yours):
-vm
/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/bin/java
Download the latest version of PyDev (currently 3.8.0) from SourceForge at http://sourceforge.net/projects/pydev/files/pydev/.
Unzip its contents to /Applications/eclipse/dropins (or wherever you have Eclipse installed) and restart Eclipse.
Hope this helps anyone who's still having the issue. Special thanks to Mohammed Lokhandwala and braineo.
Aha , It is solved just now.I show it in the following.
First , I use MyEclipse with jdk1.8,maybe some people dont know that Eclipse (or MyEclipse) has its own jvm , what is not "jdk" you downloaded and installed and the "built-in jvm" is default. You can check this out by clicking like this " Windows-->preferences-->Java-->Installed JREs" And I found my MyEclipse used the default jdk1.6 .Then I click "add" to build path of my installed jdk1.8 .
Second , I opened the configuration file named "myeclipse.ini" and check this in the following.
binary/com.sun.java.jdk.win32.x86_64_1.6.0.u43/bin/javaw.exe
Third , I replaced it with new path . Check the following out. It is new path.
D:/jdk/java/jdk1.8/bin/javaw.exe
Last , restart it .And you can find "PyDev" in "Preference".
Happy Coding with Python!
PS：Pycharm is good,and you can get it for free if you are a student or a teacher. click here
I was experiencing the same problem using java 1.7.0_101.
Updated to 1.8.0_91 and "voilá"! PyDev finally appeared.
After trying all of the listed ways to work with 1.7 I was still seeing error message when Eclipse tried to open the editors and navigators on startup. But when I created a new project it worked. Then I tried just closing all editors and reopening them and they too work. The navigator had also set itself to working set and showed nothing. When I switched that to projects it also started working.
The same thing happened to me. This is how i fixed it.
Click on "install new software" - it's under help.
Click on " what is already installed"
Uninstall PyDev
Reinstall PyDev BUT instead of the 3.3XX version, install the latest 2.XX version (i.e click on the drop down menu and select the latest 2.XX version)
It worked for me!
So I tired many of the suggestion above, and I think what finally got it to work is instal the JDK from: http://www.oracle.com/technetwork/java/javase/downloads/index.html. You might also need to uninstall the pydev plugin and reinstall it again. But after install the JDK 8, I got the Pydev to show up under preference.
menu Help > Install New Software...
don't fill "works with" but click on Add...
In the next screen, add the update site of PyDev and PyDev Extensions:
Name : PyDev and PyDev Extensions
Location: http://pydev.org/updates
and go on...
pydev 3 is buggy! Use 2.8 and you should be fine.
I also had this problem, wanted to use python3.4 as interpreter and it wasn't compatible with pydev 2.8 so after a few trials I found out that if you install pydev 2.5 everything works fine !! (At least on Eclipse Kepler).
I know this thread is old but I thought I might contribute my solution because none of the suggestions above worked for my Mac running Yosemite [10.10.2]. I hope this will be helpful to someone else. Despite updating to the latest JDK my mac kept reporting a wrong version. It turns out the symlink was point to the old version and fixing that issue got my pydev/eclipse working.
Find out the current default Java version
Java -version
Get installed versions
/usr/libexec/java_home -V
Navigate to the following folder and delete the current symlink
cd /System/Library/Frameworks/JavaVM.framework/Versions/
rm CurrentJDK
Create a new symlink pointing it to the newer installation substituting 'new-version' with appropriate version from 2 above. i.e jdk1.8.0_40.jdk
ln -s /Library/Java/JavaVirtualMachines/<new-version>/Contents/ CurrentJDK
Confirm your default version
Java -version
Restart.
Happy coding.. :)
I had to uninstall pyDev 3 and install 2.8 to get this working with Eclipse (V 4.4) and Yosemite (V 10.10)
The easiest way is just getting http://www.liclipse.com/ which has everything setup from the start... if you don't want to go that route (as LiClipse is commercial) you may want to try to specify the java 7 install manually:
Grabbed from http://pydev.org/download.html:
Well, the main issue at this time is that PyDev requires Java 7 in order to run. So, if you don't want to support PyDev by going the LiClipse route (which is mostly a PyDev standalone plus some goodies), you may have to go through some loops to make sure that you're actually using Java 7 to run Eclipse/PyDev (as explained below).
All OSes
Make sure you download/install the latest Java 7 JRE or JDK, try restarting to see if it got it automatically.
I.e.: in help > about > installation details > configuration check if it's actually using the java 7 version you pointed at.
If it didn't get it automatically, follow the instructions from:
http://wiki.eclipse.org/Eclipse.ini to add the -vm argument to eclipse.ini on "Specifying the JVM" to specify the java 7 vm.
Note on Mac OS: You can use the command "/usr/libexec/java_home -v 1.7" to get the base path for the JVM (though you also need to append "/bin/java" to the output of said command to the -vm arg in eclipse.ini).
Solution
Using standard Eclipse installation method:
In Install New Software, Add a new site to Work With. I called my entry PyDev Old and entered the Location:
https://dl.bintray.com/fabioz/pydev/old/site.xml
That has PyDev for Eclipse versions 2.8.2 to 4.5.3
Details
I am working with Indigo (3.7) and so need a version of PyDev that is older than 3.0.0. My JDK is 7 as noted elsewhere in this question. The option for Show only the latest versions of available software is turned off.
The standard advice for getting PyDev is to use http://pydev.org/updates and turn off the only latest option. That now only lists PyDev 5.
I had the same issue!
Just update all three SWs to the latest version and it will solve the problem.
Do like this:
update Eclipse to Luna Service Release 2 (4.4.2) 64-bit, then
PyDev - Python IDE for Eclipse 5.1.2 from Eclipse Marketplace and then
download and update the Java SE Development Kit 8u92 64-bit
It should work well now!
I had the same issue in Eclipse 4.4. Had to use a previous version of PyDev. It simply seems to be a matter of using the correct Java JRE/JDK and PyDev for the version of Eclipse you're running.
From http://www.pydev.org/
Release 5.2.0
Important PyDev now requires Java 8 and Eclipse 4.5 onwards.
PyDev 4.5.5 is the last release supporting Java 7 and Eclipse 3.8.
See: update sites page (http://www.pydev.org/update_sites/index.html) for the update site of older versions of PyDev.
Oct 2016:
Installed fresh new copy of Java JDK 1.8.0_102 took care of the incompatible OSX JRE 1.6
Installed fresh copy of Eclipse Neon 4.6.1
Followed pydev manual: http://www.pydev.org/manual_101_install.html
all working fine now...
First install and setup following applications as these are mentioned in above answers:
Jave (version 8 or greater)
Eclipse(version Neon/Oxygen or greater)
PyDev in Eclipse
Now go through following steps:
Eclipse -> Window -> Perspective -> Open Perspective -> Other..
Select PyDev in the list.
Click Open.
Now you are all set.
Cheers!!!
Make sure you install the 64-bit version of Eclipse if you can. If so you should be able to use the latest version of Pydev without any problem.
I decided to take a look at Clojure and thought the best and easiest method for me would be to use Netbeans with the Enclojure plugin as I didn't want to have to learn Emacs at the same time. I installed Netbeans 6.9.1 together with the latest JDK using the bundled install (on Windows 7). All went smoothly. I then followed the instructions at http://www.enclojure.org/gettingstarted for installing the enclojure plugin.
When creating a new Clojure application I get the following and see no project files :
java.io.IOException: Could not connect to URL nbresloc:/org/enclojure/ide/templates/project/ClojureProjectTemplate-1.1-distribution.zip. No such resource was found.
Maven is working using mvn --version
I have installed on both Windows 7 and Ubuntu 10.04 (same result).
I have looked on the Enclojure forum and there is a recent open thread for this issue, but it is not solved by anybody presently.
I have Java SE enabled in Netbeans
I have tried enabling the different platform versions of Clojure, 1.0.0, 1.1.0, etc..
The REPL seems to be working happily in Netbeans : (printf "hello") hellonill
I did try ClojureBox on Windows 7, but again that's Emacs, but emacs failed to start the server and hung there and became totally unresponsive.
I come from a .Net background (not Java) so my knowledge of the Java environment is somewhat lacking. My reason for looking at Clojure and not Java.
I am new to Netbeans
If you're interested in a working Maven pom, here is one I've used with Enclojure successfully:
http://puredanger.com/techfiles/100624/pom.xml
There are some project settings you'll need to change and a few dependencies to remove but it might be a good start. In general, I usually create the pom first and then just import the project into NetBeans rather than using the NetBeans options to create projects.
By the way, the REPL work in Enclojure has been split and is coming soon to the Eclipse plugin Counterclockwise.
I had written a small post on it on my blog.
Anyways here is the procedure:
On searching realized that this is a common problem for installing it on > Netbeans 7.. But with some manual tweeks managed to install it. Here are the instructions to install on Netbeans 7. plus:
Install Netbeans 7. You need only the Java SE version.
First Run of Netbeans after installation. Activate feature Java SE
Activate features is on the Start page or from Tools,->Plugins>Installed, click ‘Activate next to the Java SE support
Install Maven: It is HIGHLY recommended that you install maven: http://maven.apache.org/download.html
Go to the Netbeans->Preferences, click on the Miscellaneous tab and make sure the External Maven Home path is pointed to your maven install
Download the EnClojure 1.5 version from here. If you want to manually build, you can do that by following the instructions from here.
After downloading the file, In Netbeans: Goto:- Tools ->Plugins->Downloaded->Add Plugins->Downloaded
Then browse to the downloaded file. Later install by clicking at the “install : button.
Restart and you are on the go.
Visit here to build and run hello world project.Basically building the EnClojure 1.5 manually is the tough job. I hope above was useful.
Since adding the Blackberry Java classes from their website into eclipse, I've had it where eclipse will randomly close, with no discernible pattern, rhyme, error or reason. Here is the environment/software packages that I am using:
Windows XP SP2
Eclipse v3.5.1
Blackberry Java Plugin v1.1.1.200911111641-15
Blackberry Java SDK 4.5.0.21
I've tried the usual steps of complete uninstall and reinstallation of Eclipse and the accompanying plugins on multiple systems with the same configuration, including one that had a fresh install of Windows XP SP2. Upgrading to Eclipse 3.6 didn't work (the plugin wont' install as it's the wrong version), nor the downgrade to 3.4 for the same reason. I also increased the heap size to 512 (system has two gigs of memory) as some research into Eclipse doing this type of thing with Groovy was resolved that way, but again, no dice. Eclipse works great when the blackberry plugins are not installed, and no entries of errors or issues in the event log are helping to show what the issue with these plug-ins might be.
So if anyone has ran into this issue, and even better, has a solution, I'd love to hear about it. Thanks in advance.
EDIT: An additional to my issue, autoComplete with the Blackberry SDK seems to make this extremely unstable, like almost a guaranteed crash. Is this fixable at all?
For anyone that loads this question up trying to find a solution, I've never found a fix. It seems to be a bug with this version of the IDE. If there is a fix, please post.
Did you try to downgrade Eclipse to 3.4 (Ganymede)? I experienced similar issues when I tried upgrading Eclipse to something greater than 3.4.2.
I think the problem is with the plugin, not the IDE. Eclipse has always been stable for me until I installed the BB plugin. Since then it crashes all the time. Since I've installed the release (non-beta) version of the plugin that was recently released I can't even get my project to build.
This could be a manifestation of this bug in Eclipse. Check your C:\eclipse directory for files like hs_err_pidxxxx.log. The file goes on to explain this error:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x753ba053, pid=3144, tid=5820
#
# JRE version: 6.0_20-b02
# Java VM: Java HotSpot(TM) Client VM (16.3-b01 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [USP10.dll+0x1a053]
I've been experiencing this as well. It's completely debilitating. It causes Eclipse to just up and crash out of nowhere (and programming in a language as verbose as Java without Content-Assist is insane).
The bug has been fixed in Eclipse 3.6M7, but unfortunately I can't get the JDE Plug-in to install in the latest release candidate.
This is a known issue with Eclipse 3.5.X and has been fixed for 3.6.0
Bug Ticket link on Eclipse Bugzilla: https://bugs.eclipse.org/bugs/show_bug.cgi?id=283503
Looks like we are stuck with this until the next update to the BB Eclipse plugin.