Introduction to Java
Work through these slides. As you read, think about and answer the questions at the bottom of each page. These will be your first experience with Java, so make sure you follow each step closely.
A new menu appears.
In the Open: box, enter cmd.
(It also works to enter command, but the command interpreter window you get doing that is somewhat less convenient.)
Windows 8 option: If you clicked "command prompt" (previous page) you can skip this step.