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Java Local Development Environments How it Works Installation

Kevin McFarland
Kevin McFarland
5,122 Points
Posted by Kevin McFarland
Kevin McFarland
5,122 Points

Java commands in Terminal launches Intellj IDE...

Ever since I installed the Intellij IDE I can't run the Java REPL or any other Java command without the Intellij IDE launching. It's seems to have hi-jacked the class path to the Java VM. Can anyone help?

Thanks,

Kevin

6 Answers

Kevin McFarland
Kevin McFarland
5,122 Points
Kevin McFarland
Kevin McFarland
5,122 Points

Thank you,

That makes sense... and problem solved!

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

Hi Kevin!

Which OS?

You mean 

java MyProgram.java

Opens IntelliJ?

Kevin McFarland
Kevin McFarland
5,122 Points
Kevin McFarland
Kevin McFarland
5,122 Points

Sorry, I guess that's a little vague.

Mac OS X . In the terminal if I type any command related to Java, the Intellij Java IDE launches. Something as simple as... "java -version" will launch the IDE with error about being unable to locate the file or command. I was running the REPL just fine before installing Intellij. Can't figure it out. Don't know how to use the info output from System.getProperty() to trace the problem.

Thanks,

Kevin

Craig Dennis
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

What does 

which java

from the terminal return?

Craig Dennis
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

Alright let's check that symbolic link:

ls -la /usr/local/bin/java
Kevin McFarland
Kevin McFarland
5,122 Points
Kevin McFarland
Kevin McFarland
5,122 Points

-rwxr--r-- 1 kmcfrld staff 2771 Apr 20 15:22 /usr/local/bin/java

Thanks for helping me out on this... I suppose I need to educate myself concerning how this all works. What do you recommend?

Craig Dennis
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

No problem man! Sorry this is happening to you.

It is weird that it's not a link to somewhere. Usually there is an -> pointing to where it actually lives...can you do me a favor and see if /usr/bin/java exists

ls -la /usr/bin/java

Console foundations shows off some of these tricks.

Kevin McFarland
Kevin McFarland
5,122 Points
Kevin McFarland
Kevin McFarland
5,122 Points

Thanks, ls -la /usr/bin/java returns:

lrwxr-xr-x 1 root wheel 74 Oct 23 2014 /usr//bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java

Craig Dennis
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

Cool that's the right one...not sure how that happened but let's move the weird one out of the way:

mv /usr/local/bin/java /usr/local/bin/weirdjava

So the way things work usually is much like the ClassPath I discussed in the video. There is a PATH environment variable, and when you type a command it looks in order of those folders, so /usr/local/bin is coming before /usr/bin. Because java is no longer in the local folder (because we renamed it to weirdjava) it should find your next version. When I used the which java statement it told me what was running when we called java.

Make sense?

If you did want to see your PATH variable you can go:

echo $PATH
Kevin McFarland
Kevin McFarland
5,122 Points
Kevin McFarland
Kevin McFarland
5,122 Points

Sorry Craig,

Not sure how I've given myself the Best answer tag...