This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
There's only one classpath, but it can have several entries. The book you're reading assumes a Unix-like operating system (such as Mac OS X or Linux), whereas you seem to be using Windows. So there are a few things that work differently, e.g. you would need to type
because Windows uses the semicolon to separate classpath entries, while Unix uses a colon.