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Application Development Considerations
Developing applications that can be deployed with Java Web Start are generally the same as developing a stand-alone application for the Java 2 platform. Hence, the entry point for the application is the standard public static void main(String[] argv).
However, in order to support Web deployment -- automatic download and launching of the application -- and to ensure that an application can run in a secure sandbox, there are a few added considerations:
An application must be delivered as a set of JAR files.
All application resources, such as files and images must be stored in JAR files; and they must be referred to using the getResource mechanism in the Java 2 platform (see below).
If an application is written to run in a secure sandbox, it must follow these restrictions:
No access to local disk.
All JAR files must be downloaded from the same host.
Network connections are enabled only to the host from which the JAR files are downloaded.
No security manager can be installed.
No native libraries.
Limited access to system properties. The application has read/write access to all system properties defined in the JNLP File, as well as read-only access to the same set of properties than an Applet has access to.
An application is allowed to use the call.
An application that needs u