无法使用Java 1.8

Question

I'm having trouble using eclipse/intelliJ because whenever I try to check java version, this is what I will get. But java is present in the system preferences pane.

$ java -version
Unable to locate an executable at "/usr/libexec/java_home/bin/java" (-1)

Answer 1

If you're on Mac, do this:

export JAVA_HOME=$(/usr/libexec/java_home)

or:

export JAVA_HOME=`/usr/libexec/java_home`

Instead of this:

export JAVA_HOME=/usr/libexec/java_home

or:

export JAVA_HOME="/usr/libexec/java_home"

Answer 2

Looks like java is installed but classpath is not set. please try following command in terminal to set the java path.

export JAVA_HOME=/usr/libexec/java_home/bin/java
export PATH=$JAVA_HOME/bin:$PATH

Once this is done then check the java version. Hope it helps.

Answer 3

Check that java 8 is in your PATH or whatever it is called on windows if you are using windows.

If that's not the problem, consider uninstall and install again java, something might have gone wrong back when you installed it.

It none of this works, could you show us your intelliJ or eclipse settings about Java location ?

Answer 4

I can now run my java programme in IntelliJ Idea.

May be one day I will do the same by helping somebody out.

Solution was:

First I would like to give a context. I had deleted 'Java' folder under

/HDD/library/

On my mac, because I was trying to uninstall all legacy versions of Java. Then on Oracle site, I read that I should have kept default (java 1.6) to facilitate Eclipse installation.

Then:

1. downloaded java 1.6 on apple website - https://support.apple.com/kb/DL1572?locale=en_US

2. used @vaibhav Jain's solution to set/point to my jdk folder instead of default one. By using this:

    export JAVA_HOME=/usr/libexec/java_home/bin/java export PATH=$JAVA_HOME/bin:$PATH 

3. Dowloaded jdk 1.8 from Oracle website to update my java - http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

4. Tried checking the java version on terminal by $ java -version

5. Confirmed that it was showing the updated version.

6. Tried running java programs, and I was able to without any error messages!