Ultra Light Client Guide and Reference

Running the UI Engine as an applet

The UI Engine can be run as a Java applet that connects back to an application server through a Web browser. The currently supported Web browsers for running the ULC UI Engine as an Applet are Netscape Communicator 4.x and Microsoft Internet Explorer 4 or 5. The browser must also have the Java Plug-in 1.2.2 installed.

You can verify that the browser opens the applet successfully by opening the Java Console. If your browser does not have the required Java support, the console will show a corresponding exception.

Loading an HTML page containing the applet

A few sample HTML pages are included in the httpserver.jar file in the ULCSamples\HttpServer\lib\ directory of the ULC samples package. (You must extract the samples from the \com\ibm\ulc\httpServer\resources subdirectory of the httpserver.jar file.) When one of these pages is loaded into a Web browser, it starts the applet directly. No Web server is needed. They enable you to start Application Controller as an applet in various forms: out of place, embedded, and embedded in a separate browser window.

When run as an applet, the UI Engine is less than 250KB, resulting in reasonable download times even over low-bandwidth connections. To avoid repeated connection overhead, the code is packaged in a JAR file (Java ARchive format).


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