J2SE 1.3.0's new applet-caching feature ensures that often-used applets are always available for rapid loading and fast startup by keeping copies of the applets in a local cache. When an applet has been downloaded more than once, it can be stored in the local applet cache. This storage eliminates the need for a browser to download an applet over the network every subsequent time that the applet is needed. The local, cached copy can be used instead.
This feature is valuable for large, high-use applets. Many enterprise applets, for example, are in the megabyte-size range, and applets that large can take tens of minutes to load over a network. The new applet-caching feature eliminates the download time, enabling businesses to use a larger array of more powerful applets than ever before.