After upgrading to Java8, javac still shows 1.7

Question

I'm having issues upgrading from JDK 1.7 -> 1.8 on OSX. The upgrade has completed, but javac still returns 1.7 as the version.

I've downloaded JDK 8_u5 from Oracle's homepage, and run the installer.

I've also taken the following steps, post-install:

> export JAVA_HOME=`/usr/libexec/java_home -v 1.8`  (Executed in my .bashrc file)

> echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home

> javac -version
javac 1.7.0_21

> $JAVA_HOME/bin/javac -version
javac 1.7.0_21

> $JAVA_HOME/bin/java -version    
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

I've gone through and removed Java 1.7 (and all other JDK versions), and then re-run the installer:

> ls /Library/Java/JavaVirtualMachines
jdk1.8.0_05.jdk

Still no use, javac reports the version as 1.7.0_21

> which javac
/usr/bin/javac

> ls -ltra /usr/bin/javac 
[snipped] /usr/bin/javac -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/javac

Within that path, Current is a symlink to A. The contents of A/Commands are a series of files (not symlinks).

> cd A/Commands
> ./javac -version
javac 1.7.0_21

> ./java -version
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

Edit

Further to the original post, I've done some digging with jenv, as suggested on this answer.

> jenv add /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home                 
> jenv global oracle64-1.8.0.05
> jenv version
oracle64-1.8.0.05 (set by /Users/martypitt/.jenv/version)

> jenv info java 
Jenv will exec : /Users/martypitt/.jenv/versions/oracle64-1.8.0.05/bin/java

> jenv info javac
Jenv will exec : /Users/martypitt/.jenv/versions/oracle64-1.8.0.05/bin/javac

> javac -version
javac 1.7.0_21

This casts dispersions on my thoughts that this was a random javac lurking in my path, which was somehow getting invoked.

To be sure, I've nuked my Java completely, and tried again:

> cd /Library/Java/JavaVirtualMachines
> ls 
jdk1.7.0_55.jdk 
jdk1.8.0_05.jdk
> sudo rm -rf *  
> ls
<<empty>>
> java -version
java version "1.6.0_65"
> javac -version
javac 1.6.0_65
> which javac
/usr/bin/javac

I then re-downloaded a fresh copy the installer and ran it.

> java -version
java version "1.8.0_05"
> javac -version
javac 1.7.0_21

Update

I tried removing all JDK's, XCode and all developer tools, and re-installed fresh. Same results.

However, I'm still at a loss -- where do I go from here? How do I get javac 1.8 to get installed?

Solution 1

If /usr/libexec/java_home -v 1.8.0_05 --exec javac -version returns the correct version, then your problem is with:

/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK

With a privileged user execute:

cd /System/Library/Frameworks/JavaVM.framework/Versions/
rm CurrentJDK
ln -s /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/ CurrentJDK

Solution found in Mankeh Blog

---

Also check this answer on Super User for dynamically switching JDK versions.

---

Update: I guess I've found the culprit!

Try this:

rm -rf ~/Library/Java/Extensions
sudo rm -rf /Library/Java/Extensions

Solution found in: Java 1.7 on OSX 10.9.2 running as 1.5?

Solution 2

For Windows users:

It is possible, that you have to change your PATH variable. Try to set your "%JAVA_HOME%/bin" as the first entry in the PATH.

So now it looks like this:

 PATH    C:\Program Files\anyprogram;C:\Program Files\...;%JAVA_HOME%\bin

And you change it like this:

 PATH    %JAVA_HOME%\bin;C:\Program Files\anyprogram;C:\Program Files\...

Reason: Any other Program initiates an other Java Version first.

Comments

[Marty Pitt]

Thanks -- I suspect the root cause is the same (a javac somewhere). The folder structures in OSX and Windows are pretty different. OSX scatters it's JDK files, (and pointers to these files) all over the place, so as such, there is no jdk8 directory. It makes sense that javac wasn't within the JRE folder, as it's part of the JDK, not JRE.

[Marty Pitt]

Further to this, I've done more investigation on the paths that javac is resolving to. Based on the updated info in the question, I'm confident that javac that's being executed is the one that's within the jdk8 paths. I'm not confident that it's the same as the one that ships with jdk8, but I'm not doing anything beyond running a vanilla install. Odd.

[Marty Pitt]

Thanks Anthony. Unforutnately: /usr/libexec/java_home -v 1.8.0_05 --exec javac -version returns javac 1.7.0_21

[Anthony Accioly]

Glad to be of service. The Alliterated pixelated version of me says "Thanks for yummy bounty". The real me says: "If you ever come to Brazil let's have a beer and talk about permanently dropping Java development in OS X!" I did when Apple started dropping the ball - before Oracle was able to pick it up of course - now I'm a very happy openSUSE user and I can't complain about a thing! Really! It just works!

[TharakaNirmana]

Thanks Brazilian, worked for me, too bad brazil lost 1-7 in world cup..I am a big fan of Brazilian soccer.

[VictorV]

Work for me this solution! rm -rf ~/Library/Java/Extensions sudo rm -rf /Library/Java/Extensions Thanks!!!!

[sAguinaga]

~/Library/Java/Extensions /Library/Java/Extensions

[stuff22]

Anthony, you rock! Deleting /Library/Java/Extensions worked! Thanks!

[Filip]

@AnthonyAccioly thank you very very very much! I was minutes away from removing jenv from my machine thinking that it has messed everything up...

[psun]

@Anthony, I tried the solution from Mankeh blog, now my java -version command not working. it gives, -bash: java: command not found error. how can I fix it?

[Anthony Accioly]

@psun, are you linking to the correct JDK folder? (Folder location may change according to the Java Version)

[psun]

my command was ln -s /Library/Java/JavaVirtualMachines/jdk1.8.0_77.jdk/Contents/ Current.

[Anthony Accioly]

And is this a valid instalation with java, javac set to the right permissions? From your error message looks like OS X can't find Java in the PATH (maybe you should echo $PATH and figure out where OS X is expecting to find the Java command and where it actually is)

[CoderDave]

Downloading and installing the Mac OS JDK worked for me: oracle.com/technetwork/java/javase/downloads/…

[Danh]

This is included in After upgrading to Java8, javac still shows 1.7