... ;) That's what they're there for!! I'd suggest that if you don't know Eclipse well enough to manage importing classes into an existing project, you're probably taking on something that's beyond you. Nevertheless, good luck. If you need more help, please explain more about what you're trying to do; that way people can point you in the right direction much more easily.

Okay maybe this is beyond me, but I have to learn it from somewhere and I really want it to work. Now I've tried to follow the guide for setting up bluej, but when I run it I get a ton of errors: I have 2.060 errors and 491 warnings in the project. Most of the errors says "Something cannot be resolved to a type". Where "Something" is many different class names. So the first thing I did was that I created a new Java Project and named it "bluej". Then I extracted the source and pasted the whole content of the bluej folder into my project: After that I tried to setup the source and output paths: Lastly I went to the Run Configuration and made the following changes to a new run option I named "BlueJ": You might have facepalmed a few times looking through the steps I made, but anyway I would like some help with the problem. Thanks in advance!

This implies you don't have the AppleJavaExtensions.jar on your build path (in the libraries tab). Did you follow the entire first step from the guide? Please read the guide carefully and follow it exactly.

Wauw... I missed those steps, I'm sorry about that. I still have a lot of warnings and the console prints out "class Boot: tools.jar not found. Potential problem for execution.", but it seems to run without any problems (I did remember to add the tools.jar to the libraries tab). Thanks for your time and help.

Discovered that the tools.jar is found by the following method: For some reason "javaHomeDir" is equal to "new File(System.getProperty("java.home"));". System.getProperty("java.home") links to the JRE on my system and therefore isn't able to find the tools.jar. I fixed the problem by copying the tools.jar into the JRE lib, but this seems like an odd fix. I will try to find a way to look for the JDK folder instead and change the code.

Any specific reason why Eclipse uses the JRE by default? I went to Window->Preferences->Java->Installed JREs and changed the path from my JRE to my JDK. It feels weird to change what is labeled as "Installed JREs" to a JDK, but I did the job. Now for the Greenfoot setup. Once again, thanks a lot.

I follow the guide for setting up Greenfoot in Eclipse. I am sure I followed the first step correctly. I don't get the second step and at the third step I ran the bluej build.xml in the ant view without any problems, but when I did the same for the Greenfoot build.xml I get the following error: Hopefully this will be my last question. Why does this error occur? Next time someone tells me that something is beyond me I will listen.

I tried to change the build.properties. They look like this: BlueJ Greenfoot I still get the errors with the Greenfoot setup, just with the new paths.

These are Java properties files; you need to either double your backslashes, or use forward slashes, in your paths. Look at the example paths in the BlueJ build.properties file. Also your build_java_home looks like a unix setting, but all your other settings are for Windows.

Removed both projects and started over. Got some problems again at the build thing. This time my properties looked like this. BlueJ I am not sure about the mac_bundled_jdk_path. What should I do with it when I use Windows? Remove it or just let it stay as it is? Greenfoot This time the Greenfoot build printet "BUILD SUCCESSFUL Total time: 12 seconds" In the end, but I got some warnings: Some of these: A whole bunch of these: This: This: And more of those " warning: bootstrap class path not set in conjunction with -source 1.6" Lastly this: I had to add "junit-4.8.2.jar", "AppleJavaExtensions.jar" and "tools.jar" to the Greenfoot project (not in the guide) to get rid of all the errors. When I run the Java Application described at the buttom of the Greenfoot setup guide I get "cannot find splash image: greenfootsplash.jpg" in the console and an "empty" Java Application is added to the Windows process bar. Any thoughts?

Got rid of the 1.6 warnings by replacing 1.6 with 1.7 in the build.xml besides that it doesn't seem like it changed anything. The 'includeintruntime' warnings doesn't seem to make any difference (looked it up here ). I can see that "greenfootsplash.jpg" exists at "D:\Program Files (x86)\eclipse\workspace\bluej\boot\src\bluej" and at "D:\Program Files (x86)\eclipse\workspace\greenfoot\resources\images". I would like to know where I can find the piece of code printing out "cannot find splash image: greenfootsplash.jpg" since this could help me figure out where on my system the program is looking for the splash.