Basic HTML version of Foils prepared July 6 99

Foil 13 Java Applets

From Use of Java Language in Computational Science DoD Modernization Users Group Conference Monterey -- June 7 99. by Nancy McCracken, Geoffrey C. Fox


1 Java applets are classes written in Java which are intended not to run as stand-alone programs (as applications do) but as subprograms of a browser which is already managing a window.
2 Applets should NOT have main method but rather methods called init, start, paint etc. for displaying on the browser window
3 Applets are not trusted as a default, so they have several restricitions on running on the client machine
  • no printing or file I/O
  • cannot connect through the network to any machine but its own server
  • any new windows created by the applet have a warning label

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