GET it from http://jruby.org/

There is a download page, download and exract the tar file somehwere.

I put it in /System/Library/Frameworks/JRuby.framework/jruby-1.5.1

I then created a symbolic link to jruby_current

ln -s jruby-1.5.1/ jruby_current

And then simply add it to my ~/.bash_profile

$vi ~/.bash_profile
export PATH=/System/Library/Frameworks/JRuby.framework/jruby_current/bin:$PATH
#Reload the profile…
$. ~/.bash_profile
#Try out jruby…
$jruby -v
jruby 1.5.1 (ruby 1.8.7 patchlevel 249) (2010-06-06 f3a3480) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_17) [x86_64-java]

Now you can add the JRuby SDK to your Java Module in Intellij:

Now you can have ruby and Java in the same project. Awesome.

Today I spent a while puzzling over why my StringTemplates weren’t available on the classpath in Intellij.

I forgot that you have to specifically identify file types to copy into the classes folder, you do it in the project settings. Search for “resource” and look in the compiler settings.

I found that after an update, I was still seeing some entries lying around. Thanks to this issue on the intellij community forum I was able to simply remove the contents svn cache and it works.

~/Library/Caches/IntelliJIdea90/vcsCache

Whilst playing around with some code analysis I thought it would be useful to be able to output a hyperlink back to a line of code in the IDE console. As it happens, you can “Trick” IntelliJ to do this with the following log statement:

    @Test
    public void canClickOnAFileInTheConsoleAndGoToTheLineOfCode() {
        log.info(String.format(“Check it at %s. (%s.java:%d)”,
            getClass().getName(), getClass().getSimpleName(), 15));
    }

The pattern it seems to match is something like at {classFullName}.{identifier}({classSimpleName}.java)

classFullName has to be a valid class name.
identifier is usually used for the method name, but it can be anything. The full stop is nescessary. So in the example above, I put a space in there and so it reads like a sentance.

Anyone know a another way to do this?

UPDATE:

Actually it seems that you can get something similar if you output a full path name, e.g.:

    File f = new File(“./src/test/resource/testfiles/level_01/level_01_01/file_01_01_A.txt”);
    log.info(f.getAbsolutePath() + “:” + 34);

This will create a link in the output window to the line of the file. Nice.

Mind mapping, invented by Tony Buzan is a way to get lots of ideas down and relate them together.

MindMeister is a great online Mind Mapping tool. It can be used for free but for $59 for a year you get things like offline access. It is completely written using html and javascript.

Map On!

REST Client plugin

It was also available from the plugins list in the settings.

Rest Client intellij plugin screenshot

On restart, IntelliJ just did not work, even After I removed the plugin (See this post for more plugin details)

Infact it seemed to hose my current project aswell – I had to remove intellij.app and replace it with the original download (Not forgetting of course to set the JVM version

I restarted IntelliJ and it just hung there which led me on a trip to find out what was wrong.

First up I found the log files in

~/Library/Caches/IntelliJIDEA8x/log/

And saw this exception

Expected implementation for extension declaration (ep = com.intellij.completion.contributor)

This seems to be a general problem for plugins, e.g. the Scala plugin (http://youtrack.jetbrains.net/issue/SCL-1592).

So you need to remove the plugin which will have been installed here:

~/Library/Application Support/IntelliJIDEA80

Thanks to this post for triggering the solution.

Thanks to my colleague Tom Czarniecki I have found a solution that appears to be working.

Some googling turned up very little, but mostly points to the JVM being the problem. I had tried updating the Java installed on os x and setting the JDK to be 1.5 which did seem to improve stability but still crashed.

Tom pointed out that Intellij also has a configuration for the JDK version in its config which I updated to be 1.6+ and then switched my JDK back to 1.6 64bit. That was a week ago and not only have I had no crashes, of course the whole experience is smoother under 1.6! woo hoo!

The trick lies in the file

/Applications/IntelliJ IDEA 8.1.3.app/Contents/Info.plist

<key>JVMVersion</key>
<string>1.6*</string>

To Switch JDKs:

/Applications/Utilities/Java/Java Preferences.app

Some other references I found along the way:

http://www.jetbrains.net/devnet/thread/282406

JDK Update:

http://www.apple.com/downloads/macosx/apple/application_updates/javaformacosx105update4.html

To See IntelliJ Log output:

~/Library/Caches/IntelliJIDEA8x/log/

UPDATE:

For Intellij9:

/Users/jim/Library/Logs/IntelliJIdea90/idea.log

(I found this using the activity monitor and then “inspect process” and you can see a list of open files and ports)

IntelliJ stores its plugins here (Thanks to these guys) :

~/Library/Application Support/IntelliJIDEA80

Anyway in Eclipse you do CTRL+LEFT_ARROW, CTRL+RIGHT_ARROW which is particularly useful if you have just jumped to the declaration of a method so you can go back to where you were.

In Visual studio the equivalent is CTRL+- (thats control and the minus key together) to go forwards, its CTRL+SHIFT+- (shift plus minus).

I have now re-mapped these to CTRL+ALT+LEFT_ARROW and CTRL+ALT+RIGHT_ARROW.

You map in Tools->Options->Keyboard its a bit tricky to find stuff they are called View.NavigateForwards and View.NavigateBackwards. You can discover these by just typing in the box at the bottom and it will show you what they are assigned to.