来自root的mac os java版本是不同的

Question

after installing jdk7u5 for mac os I got different java-versions for "normal" user and root.

java -version gives me the 7.

sudo java -version gives me the 6.

I've looked up in the /System/Library/Frameworks/JavaVM.framework/Versions/ found that there are some links. After I resolved the links to the real Directory I tried it again with the whole path.

/System/Library/Frameworks/JavaVM.framework/Versions/A/Commands/java -version -> 7

sudo /System/Library/Frameworks/JavaVM.framework/Versions/A/Commands/java -version -> 6

Same with javac!

Hope you guys could help me!

Answer 1

Under OSX /usr/bin/java locates the java version to be used by looking at what you chose using /Applications/Utilities/Java Preferences.app . The files ths uses are also updated by the Oracle updater.

As you have to drag the versions manually to set Java 1.7 you will have only set this for the user you run it as ie not root. To set it for root I ran the app as sudo /Applications/Utilities/Java\\ Preferences.app/Contents/MacOS/Java\\ Preferences and moved 1.7 to the top.

As far as I can see the files the app updates are in ~/Library/Preferences/ByHost/com.apple.java.JavaPreferences.<hex number>.plist where <hex number> is machine related. Root's home directory is /var/root so I now have /var/root/Library/Preferences/ByHost/com.apple.java.JavaPreferences.<hex number>.plist

Answer 2

Caught the same issue on Mac OS X 10.7.5 + JRE 1.6.0_43 + JDK 1.7.0_17.

• java -version => 1.7
• sudo java -version => 1.6

Open java control panel with sudo, this fixes the problem:

• sudo /usr/bin/javaws -viewer

Answer 3

It appears that the java version used by the link you specified depends on the JAVA_VERSION environment variable. Could it be that this variable is set for your user, but will be cleared by sudo ? In that case, explicitely unsetting it for the user or setting it for root should help to keep them in sync. Of course, you might also replace the /A/ by the actual version you want to execute.