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Aug 15, 2005 | Home > Bugzero > FAQs > KB

Java applet issues

An applet is a program written in the Java™ programming language that can be included in an HTML page, much in the same way an image is included. When you use a Java technology-enabled browser to view a page that contains an applet, the applet's code is transferred to your system and executed by the browser's Java Virtual Machine (JVM).

Problems arise when

  • The browser is not Java enabled
  • The JVM does not have the right version
  • No sufficient permissions are granted
With IE, since Microsoft does not support Java, you will need to install Sun's Java plugin yourself. After installation, you shall see the "Sun Java Console" under Tools menu. Open it to see the JVM version.

With Mozilla Firefox, if you have problems installing Java plugin, you can do so mannualy: After install JRE, copy 

java/jreXXX/bin/NPxxx.dll to   Mozilla FireFox/plugins/

These files are like:

	NPJava11.dll
	NPJava12.dll
	NPJava13.dll
	NPJava14.dll
	NPJava32.dll
	NPJPI150_04.dll
	NPOJI610.dll
It is recommeneded to install the lastest update of JRE.

Applets run within a ``sandbox''. This is a security model that severely restricts the capabilities of applets to access the local system. Excluded are means of reading from or writing to the local disk, or forking arbitrary local processes. There also might be a firewall probelm. If you run into such a security problem, however, it is an issue more of the applet itself, you should contact the author.

 
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