I searched the
Java Tutorial 1.5 and found the following:
Location in my version:
file:///E:/Java/Tutorial/ext/basics/download.html
Copy of some of the text:
If an applet or application uses more than one extension, you can list multiple URLs in a manifest. For example, the following is a valid header:
Class-Path: area.jar servlet.jar images/
In the Class-Path header any URLs listed that don't end with '/' are assumed to be JAR files. URLs ending in '/' indicate directories. In the preceding example, images/ might be a directory containing resources needed by the applet or the application.