Related
I am not able to run eclipse on macOS Big Sur developers beta I am getting an error stating "Failed to create the java virtual machine". Is there any way to solve the error
The java version I am running:
I have the same issue. I solve it by opening /Applications/Eclipse.app/Contents/Info.plist and adding:
<string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home/bin/java</string>
inside
<key>Eclipse</key>
<array>
ADD HERE!
</array>
Of course the "/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home/bin/java" value must be replaced with the actual path based on the JDK version you are using.
TL;DR
Use this to export JAVA_HOME variable:
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_231.jdk/Contents/Home
Long Version
This answer is wrt to BigSur v11.0.1 Beta. What I explored is if you have configured your .bash_profile JAVA_HOME export something like this
export JAVA_HOME=$(/usr/libexec/java_home)
Then it case it was trying to importing this, for some reason
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
rather than
/Library/Java/JavaVirtualMachines/**/Contents/Home
For the quick fix, I configured my JAVA_HOME like this
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_231.jdk/Contents/Home
If you are switching between multiple JVMs at once then you may find this .bashrc/.zshrc configuration handy
export JAVA_8_HOME="jdk1.8.0_231.jdk"
export JAVA_11_HOME="openjdk-11.0.2.jdk"
export JAVA_13_HOME="jdk-13.0.1.jdk"
alias java8='export JAVA_HOME="/Library/Java/JavaVirtualMachines/$JAVA_8_HOME/Contents/Home"'
alias java11='export JAVA_HOME="/Library/Java/JavaVirtualMachines/$JAVA_11_HOME/Contents/Home"'
alias java13='export JAVA_HOME="/Library/Java/JavaVirtualMachines/$JAVA_13_HOME/Contents/Home"'
# default to Java 8
java8
Edit the Info.plist to set the -vm value.
Install the latest Eclipse version, I am using version 2020-06
Right-click on Eclipse.app
Show Package Contents
Open Info.plist with a text editor
Add -vm/Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home/bin/java under the under the key Eclipse. Note - edit the path to Java depending on what version you have. You can see the list by running /usr/libexec/java_home -V
To fix this issue I deleted the openJDK VM and reinstalled it
Delete the openJDK folder from
/Library/Java/JavaVirtualMachines
Reinstall openJDK from here
Open applications and right-click spring suite > Show Package Contents
Edit file Contents/info.plist. Add this
<string>-vm</string><string>/Library/Java/JavaVirtualMachines/adoptopenjdk-14.jdk/Contents/Home/bin/java</string>
This should be inside the array tag inside eclipse key
I solved this by using Homebrew
brew cask install eclipse-java
Same thing happened to me turns out when I ran echo $JAVA_HOME the directory has been replaced,
Doing a brand new export to the java home file seemed to do the trick,
I used
export JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/
Seemed to do the trick, note that your directory might be different I suggest tracing to your correct directory by using "/" then tab to trace the directories.
In my case I'm using a old version IDE and it's dead, already add the JAVA_HOME variable, ini and list of eclipse and not working, also noticed virtualbox is dead also can start any VM.
-vm/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home/bin/java
Confirmed, adding below to Infolplist worked. I have Oracle jdk 8 and updated the value below.
-vm/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/bin/java
I tried all solutions posted under this question; but none of them worked for me. Finally, I installed the latest version of Eclipse 2020-09 (4.17.0) to make it work.
I upgraded to Big Sur a few days ago and also encountered this problem when I finally ran Eclipse this morning.
The latest Eclipse 2020-12 release includes its own JRE (!), thus I no longer experience "Failed to create the java virtual machine". I've left my Java versions unchanged for now as I only use Eclipse to create Tomcat webapps and do not run standalone Java.
$ /usr/libexec/java_home
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
$ /usr/libexec/java_home -V
Matching Java Virtual Machines (3):
1.8.121.13 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
1.8.0_121 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home
1.7.0_60 (x86_64) "Oracle Corporation" - "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
In addition to all steps recommended above I had to create the following symlink:
cd /Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home/lib
sudo ln -s ../jre/lib/server/libjvm.dylib libserver.dylib
The version of the Eclipse I use is 4.4.1. (because tested to work well with WebObjects)
I had to install the latest version of Eclipse to make it work since that uses Java 11. This happened after I updated to Big Sur.
Step 1 : Uninstall jdk 8
Step 2 : Install openjdk14 by brew
Step 3 : install eclipse 2020-12 version
I deleted all Eclipse files that were already installed and just simply reinstalled with this --cask eclipse-jee on Home brew. I hope it's helpful for whoever is struggling just like past myself.
I experienced this issue while using Eclipse Mat and JDK Mission Control
On Mac OS v11.6 (Big Sur ) ,the dependency was Java 11 . The following was added in the whatever.app/Contents/Info.plist
<key>Eclipse</key>
<array>
<string>-vm</string
<string>/Users/<yourHomeDir>/.sdkman/candidates/java/11.0.2-open/bin/java</string>
<string>-keyring</string>
<string>~/.eclipse_keyring</string>
</array>
If you are using eclipse 2020-06 sure you will be facing pop-up with empty grey window when debugging.
No chance to use Big Sur with eclipse 2020-06 anymore. I'm using eclipse 2021-03 IDE developer and it's working fine. But STS not support anymore you have to manual change to old JAVA 1.8 for your project.
Right click project and properties
Configure Java Build Path
Libraries Tab -> Edit -> change to Java 1.8
Order and Export Tab -> move JRE System Library on top of Project and External Dependencies.
Apart from the suggestions given, I also had to do an additional step of removing eclipse app from quarantine :
1)Open up a shell
2)Cd yourself into the eclipse directory.
3)Check the attributes of the directory Eclipse.app/ $ xattr Eclipse.app/ com.apple.quarantine
4)Remove the ‘com.apple.quarantine’ attribute. $ xattr -d com.apple.quarantine Eclipse.app/
After completing this along with steps to edit the Info.plist, I was able to open Eclipse
Setting-security&privacy->Full Disk Access, add eclipse or Spring Tool Suite app.
brew install openjdk
add to /Applications/ApacheDirectoryStudio.app/Contents/Info.plist <dict>
<array>:
<string>-vm</string>
<string>/usr/local/opt/java/libexec/openjdk.jdk/Contents/Home/bin/java</string>
I use Eclipse to program in Java and , having already familiar with this development environment , I would use it for C/C++ projects.
Version: Eclipse SDK 4.2.2 (Juno)
O.S.: Ubuntu 12.04 LTS
I installed the CDT plugin by following the italian guide of the ubuntu documentation:
http://wiki.ubuntu-it.org/Programmazione/Eclipse#CDT
The only difference is that, at point 4, I have not included the source shown (Galileo), but the my version (Juno)
http://download.eclipse.org/tools/cdt/releases/juno
it's ok, found the source
CDT Main Features
CDT Optional Features
the installation is successful (indeed Eclipse show me CDT as the latest software installed, and an subsequent attempt to reinstall, Eclipse returns an error that it is already installed)
The problem is that when I restart Eclipse , I have no change. For instance , if I open the menu " File -> New -> Other" , I have no additional option to create a new C/C++ project.
I regularly installed on my computer the C/C++ compiler (gcc and g++ , version 4.6.3).
I also tried to install the plugin from the terminal:
sudo apt-get install eclipse-cdt
no change.
I search through the options in Eclipse to see if it was a problem enabling views of items in the menu, but nothing. Even in the "Window -> Preferences" I have no "C/C++" category .
I also changed my workspace ..... nothing .
Please help me, thanks
i had the same issue. i installed the latest eclipse, luna and mars. both had the c/c++ development tools.
my development environment had an older version of java installed, i.e. 1.6. apparently, luna/mars require 1.7 to be installed. i, at first, modified the eclipse.ini file to
-vmargs
-Dosgi.requiredJavaVersion=1.6
i started eclipse and the c/c++ project was not available. so i couldn't create a c/c++ project because it wasn't available in the wizard.
i updated my java to 1.7 on my machine; changed the eclipse.ini file back
-vmargs
-Dosgi.requiredJavaVersion=1.7
then started eclipse. viola. the option to create a c/c++ project is now available.
so basically, it seems that the newer eclipse requires 1.7 java. otherwise, it will disable features.
First of all, you have to open "C/C++ perspective". Try to go to menu "Window--Open Perspective -- Other--C/C++".
When you are in C/C++ perspective you should be able to create a new C/C++ project.
Also if you already have a loaded project, you can to convert to C++ project. Simply select it and then follow the right-click menu: "New" -- "Convert to a C/C++ Project (Adds C/C++ Nature)". Alternatively, simply go to menu File--New--Convert to C/C++ Project and it will show the list of all projects.
But again, the first and major step is to switch to C/C++ perspective.
Good luck!
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 am on Mac 10.8.2, i have both java 1.6 (32/64bit enabled) and java 1.7 on my machine and the JAVA_HOME is pointed to java 1.6, but whenever I try to enable QML previewing in my momentics ide (QNX® Momentics® IDE for BlackBerry® 10 Native SDK, Version: 10.0.9), I get the error in the Title. looked a bit into the log under workspace/.metadata/.log, and it logged the following:
!MESSAGE QML Preview compatibility check log.
Error: This Java instance does not support a 32-bit JVM.
How can I get the ide to point to java 1.6? Is it somewhere in the startup script of the application that I can change?
Thanks
QNX Momentics is based on Eclipse, so you should be able to change the JVM used by editing the .ini file for the IDE. If your Momentics is installed in the default location, in Finder navigate to:
/Applications/bbndk/ide/macosx/x86/eclipse/
Right click on qde.app (if you have extension hidden it might just be qde with the momentics icon) and choose Show Package Contents.
Under /Contents/MacOS/ edit the qde.ini file in TextEdit.
At the top of the file, before -vmargs add the following:
-vm
/path/to/your/java/jvm/here
ie.
-vm
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java
Save the file and launch Momentics, and it should now be using the JVM you specified. Check your workspace/.metadata/.log after the startup to confirm this.
I've met the same problem with you, I've tried #nonesuchnick 's answer but unfortunately that did not work for me.
And I've similar environment with you: I've got Java 1.7 (the Oracle one) and 1.6 (the Apple one) installed on my Mac (10.8.2).
I resolved my problem via this way:
Delete Java 1.7 completely
Check your NDK installer's md5 to ensure you've got the correct one.
To delete Java 1.7 completely, you'll need to delete the jdk1.7 folder under
/Library/Java/JavaVirtualMachines/
and delete the internet plugin JavaAppletPlugin.plugin under
/Library/Internet Plug-Ins
Then open terminal and type java -version to make sure that your PATH variables is correctly set to your java 1.6 path (I mean the Apple one).
Upon finish this, you can try to uninstall the BB10 NDK and reinstall it, then try to enable the QML Preview, this time it should work.
Reference:
How do I uninstall Java 7 for my Mac?
I've instaled the Java for Developer package provided from Apple for 10.7 and java apps are running fine
but eclipse cannot find the JDK root path and I cant either.
Anybody any ideas?
You can download the 10.7 Lion JDK from http://connect.apple.com.
Sign in and click the java section on the right.
The jdk is installed into a different location then previous. This will result in IDEs (such as Eclipse) being unable to locate source code and javadocs.
At the time of writing the JDK ended up here:
/Library/Java/JavaVirtualMachines/1.6.0_26-b03-383.jdk/Contents/Home
Open up eclipse preferences and go to Java --> Installed JREs page
Rather than use the "JVM Contents (MacOS X Default) we will need to use the JDK location
At the time of writing Search is not aware of the new JDK location; we we will need to click on the Add button
From the Add JRE wizard choose "MacOS X VM" for the JRE Type
For the JRE Definition Page we need to fill in the following:
JRE Home: /Library/Java/JavaVirtualMachines/1.6.0_26-b03-383.jdk/Contents/Home
The other fields will now auto fill, with the default JRE name being "Home".
You can quickly correct this to something more meaningful:
JRE name: System JDK
Finish the wizard and return to the Installed JREs page
Choose "System JDK" from the list
You can now develop normally with:
javadocs correctly shown for base classes
source code correctly shown when debugging
On newer versions of OS X you should find ALL JREs (and JDKs) under
/Library/Java/JavaVirtualMachines/
/System/Library/Java/JavaVirtualMachines/
the old path
/System/Library/Frameworks/JavaVM.framework/
has been deprecated.
Here is the official deprecation note:
http://developer.apple.com/library/mac/#releasenotes/Java/JavaSnowLeopardUpdate3LeopardUpdate8RN/NewandNoteworthy/NewandNoteworthy.html#//apple_ref/doc/uid/TP40010380-CH4-SW1
I have just ran into the same problem after updating. The JRE that is downloaded by OSX Lion is missing JavaRuntimeSupport.jar which will work but can wreck havoc on a lot of things. If you've updated, and you had a working JDK/JRE installed prior to that, do the following in Eclipse:
1) Project > Properties > Java Build Path > Select broken JRE/JDK > Edit
2) Select "Alternate JRE"
3) Click "Installed JREs..."
4) In the window that opens, click "Search..."
If all goes well, it will find your older JRE/JDK. Mine was in this location:
/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home
For Mountain Lion, Apple's java is up to 1.6.0_35-b10-428.jdk as of today.
It is indeed located under /Library/Java/JavaVirtualMachines .
You just download
"Java for OS X 2012-005 Developer Package" (Sept 6, 2012)
from
http://connect.apple.com/
In my view, Apple's naming is at least a bit confusing; why "-005" - is this the fifth version, or the fifth of five installers one needs?
And then run the installer; then follow the above steps inside Eclipse.
You can download jdk6 here http://support.apple.com/kb/DL1573
Wish it helps