Implementation

Implementation
Java Web Start provides a series of classes in the javax.jnlp package which provide various services to the application. Sun designed most of these services with the aim of allowing carefully controlled access to resources (such as files and the system clipboard) while restricting the application to authorized operations.
Sun introduced version 1.0 of Web Start in March 2001.[1] Since J2SE 1.4 Web Start comes as a default part of Java Runtime Environment (JRE) called javaws, and computer administrators no longer have to install it separately. Microsoft's .NET framework's ClickOnce is similar to Java Web Start.

- from http://en.wikipedia.org/wiki/Java_Web_Start

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