Billeder i applets (reload af jar-filen)

MediaTracker plejer at være løsningen

http://www.ictp.trieste.it/~manuals/programming/Java/tutorial/uiswing/painting/improvingImageAnim.html

Jeg kan ikke lige se hvorfor at jarfilen bliver hentet fra serveren, hver gang et billede loades, skulle have noget at gøre med MediaTracker?

Især ikke når jeg henter files vha. getResourceAsStream(xxx)

Læs hele linket.

Du etablerer en ny connection hvergang !

Whether or not you use MediaTracker, loading images using URLs (as applets usually do) usually takes a long time. Most of the time is taken up by initiating HTTP connections. Each image file requires a separate HTTP connection, and each connection can take several seconds to initiate.
The key to avoiding this performance hit is to put the images in a single file. You can do this using a JAR file, as described in Combining an Applet's Files into a Single File and Using JAR Files: The Basics.

Another performance strategy that might help is to combine a group of images into a single image file. One simple way to do this is to create an image strip -- a file that contains several images in a row. Here's an example of an image strip:

Forstår det stadig ikke. Billerne ligger jo kun i samme jar-fil som appletten? Hvorfor bliver jar-filen hentet flere gange fra serveren?

" loading images using URLs (as applets usually do) usually takes a long time" - her ligger billerne jo uden for jar-filen, derfor hentes de vha. http-kald!