What is Java:

Java is a computer language developed by Sun, in many aspects it assembels the C++ and other object languages. One main difference however is that is platform independent e.g. the same program can run on different machines and with different Operating Systems. This important feature has been used by both Netscape and Microsoft to design WebBrowser that can run Java programs "inside" them, this programs are called Applets. We have used the Java technology to implement three Applets intended to be used by the teacther to make and administrate HTML pages containing questions.

Problems with Java:

As Java is a relative new Technology (mid 96) it's still under developing and new versions are released every once in a while. Our applets uses the Java 1.1. Unfortunatley the Java 1.1. is not totally supported by Netscape Communicator 4.0, which gives rise to some extra problems. Microsoft Explorer do support Java 1.1. but has it disvantages as well.

Using Netscape:

To use Java 1.1. with Netscape there are two possibilities.

• Upgrade Netscape Communicator 4.05 with a special java batch
• Use a so called Plug-In, provided by Sun. The Plug-In are available for Windows95, Unix and Mac. It works with Netscape 3.0 and younger.SKRIV LANK.

Plug-In, Installation.

1. Download the Plug-In module, this is easiest done by using your browser to open one of our Applets

1. MakePagePlugIn
2. ReadAnswerPlugIn
   1. If everything goes alright, Netscape will auto download the Plug-In (you might have to press a button in the middle of the area?). When the Plug-In file has been downloaded it will be auto installed.
   2. Due to a bug in the Plug-In you must do the following. Open the Java Plug-In Control Panel, a shortcut to it could be found in the Start(Indicio) pop-up menu. In the text field marked Java Run Time Parameters, copy and paste the following (use ctrl-c to copy and ctrl-v to paste)
3. -Dappletviewer.security.mode=unrestricted
   1. Star one of the Applets ending with Plug-In e.g. MakePagePlugIn, the program should now run.

• NOTE! If you use the PlugIn you should always start the Applets using the names ending with PlugIn

Batch installation:

Please see Nescapes instructions at.

LANKA HAR

Using Microsoft Explorer:

The latest version of Microsoft explorer will run the Applets with out problems. Always start the applets with the names NOT ending with PlugIn.

If you have an older version of Explorer you can either download a newer or use the PlugIn, see instructions above.