java - 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?

Answer 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

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

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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?