What is Java Web Start and how is it launched?
What is Java Web Start?The Java Web Start software allows you to download and run Java applications from the web. The Java Web Start software:
Getting Java Web Start Software
Java Web Start is included in the Java Runtime Environment (JRE) since release of Java 5.0. This means that when you install Java, you get Java Web Start installed automatically. The Java Web Start software is launched automatically, when a Java application using Java Web Start technology is downloaded for the first time. The Java Web Start software caches (stores) the entire application locally on your computer. Thus, any subsequent launches are almost instantaneous as all the required resources are already available locally. Every time you start the application, the Java Web Start software component checks the application's website to see if a new version is available, and if so, automatically downloads and launches it.
Launching an Application Using Java Web Start Software
MORE TECHNICAL INFORMATION
For more technical information:
Developer Java Web Start Documentation