During this hour, you had a chance to create both a Java application and an applet. These two types of programs have several important differences in the way they function and the way they are created.
Both kinds of Java programs can be easily customized at the time they are run. Applications use arguments, which are specified on the command line at the time the program is run. Applets use parameters, which are included on the web page that displays the applet by using HTML tags.
The next several hours will continue to focus on applications as you become more experienced as a Java programmer. Applications are quicker to test because they don't require you to create a web page to view them; they can be easier to create and more powerful as well.