Adding to the classpath on OSX
JavaClasspathJava Problem Overview
Can anyone tell me how to add to the classpath on OSX?
Java Solutions
Solution 1 - Java
If you want to make a certain set of JAR files (or .class files) available to every Java application on the machine, then your best bet is to add those files to /Library/Java/Extensions.
Or, if you want to do it for every Java application, but only when your Mac OS X account runs them, then use ~/Library/Java/Extensions instead.
EDIT: If you want to do this only for a particular application, as Thorbjørn asked, then you will need to tell us more about how the application is packaged.
Solution 2 - Java
In OSX, you can set the classpath from scratch like this:
export CLASSPATH=/path/to/some.jar:/path/to/some/other.jar
Or you can add to the existing classpath like this:
export CLASSPATH=$CLASSPATH:/path/to/some.jar:/path/to/some/other.jar
This is answering your exact question, I'm not saying it's the right or wrong thing to do; I'll leave that for others to comment upon.
Solution 3 - Java
To specify a classpath for a single Java process, you can add a classpath option when you run the Java command.
In you command line. Use
java -cp "path/to/your/jar:." main
rather than just
java main
The option tells Java where to search for libraries.
Solution 4 - Java
If your shell is tcsh or csh, you can set it in /etc/profile. Open terminal, "vim /etc/profile" and add the following line:
setenv CLASSPATH (insert your classpath here)
Solution 5 - Java
Normally there's no need for that. First of all
echo $CLASSPATH
If there's something in there, you probably want to check Applications -> Utilites -> Java.