Java Home Directory

Question

I am looking for my java home directory. When I tried "whereis java" I got java: /usr/share/java but then when I did ls -lah /usr/share/java I got:

total 12K drwxr-xr-x 2 root root 4.0K Aug 13 04:37 . drwxr-xr-x 100 root root 4.0K Aug 13 04:38 .. -rw-r--r-- 1 root root 2.6K Apr 28 15:43 libintl.jar

Could someone please clue me in?

@raffian I tried echo $JAVA_HOME and it came up blank, so I guess it's not set yet. I am using ubuntu version 14.04 — user2590144
– user2590144, Commented Aug 16, 2014 at 17:45
...and you're sure that you've got Java installed? (sudo apt-get install openjdk-7-jdk) — Makoto
– Makoto, Commented Aug 16, 2014 at 19:58
try the command which java. It will try to locate the command java in your PATH. The folder /usr/share/java is a jar repository, but seems strangely empty. If you want to check if you have your java installed, try this: dpkg --get-selections | grep -v deinstall | grep openjdk — papacito
– papacito, Commented Aug 16, 2014 at 20:09

Mac Lotsen · Accepted Answer · 2015-12-03 13:16:58Z

The SDK's are located at:

$ ls /usr/lib/jvm default-java java-1.7.0-openjdk-amd64 java-7-openjdk-amd64

To set JAVA_HOME just point it at default-java (which is just a symlink for selected java version)

$ export JAVA_HOME=/usr/lib/jvm/default-java

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