Macbook Pro for AP Comp Science class

4. Many of the lab exercises in the curriculum rely upon code that has already been compiled into a Java library: gpdraw.jar. You need to download this file and follow the step below. (Make sure you save the file as .jar and not .zip. Some browsers try to change the extension from .jar to .zip.)
1. Copy gpdraw.jar to your Java installation’s \ jre\lib\ext\ folder.

*If you have trouble with this step, it might be because you don’t have file extensions turned on. You need to know exact files names. In any Windows Explorer window (like My Computer), choose Tools | Folder Options. In the View tab, make sure “Hide extensions…” is NOT checked. Then you can see the real file names such as gpdraw.jar. It’s the .jar part you need to be able to see. Rename the file to gpdraw.jar if the extension is wrong. If you have Windows Vista, here are your instructions.
To show file extensions (for Vista users):

1. Go to any folder.

2. At the top left corner, click "organize", "folder and search options", "view", and then
uncheck "Hide extensions for known file types"



5. Finally, you should install the API documentation for gpdraw.jar. Download gpdraw.zip from and follow the step below.
1. Unzip gpdraw.zip into to your Java installation’s \docs\api\ folder. It will automatically create a folder called gpdraw.

*By the way, do you see why file extensions matter now? You have two files named “gpdraw” but one is a .jar file and the other is a .zip file. They’re not the same!

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