I'm working through the book Head First Java, and I'm having problems getting some of the code to run. It compiles without error, but when I run the class I get this:
Any ideas on how to fix this? I'm thinking I probably don't have something installed properly. I've tried this code on three different computers now, all Windows machines, and I get the same error. If I need to post the program code to help, let me know; I just didn't want to make the post overly long.