This document describes the most commonly used elements of a JNLP file. For a complete description of the format, refer to the specification. The JNLP file is an. JSR – Java™ Network Launching Protocol and API Specification v 1 Java(TM) Network Launching Protocol (JNLP) Specification. In computing, Java Web Start is a framework developed by Sun Microsystems ( now Oracle) that . jnlp spec=”+” codebase=”” href=””> Launch applet with Web Start Foo Bar.

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The package and extension elements are not discussed in this developer’s guide. Can be used to indicate this jar may be downloaded eagerly, lazily, or for progress indication.

However, the reference implementation, a browser helper application, will include a modest GUI for informing the specificatuon of progress in loading and starting the Java application. Specifies the architecture for which this information element should be considered. Specifies a JAR file that is part of the application’s classpath. The first time an application is launched following the addition or modification of the icon element in the JNLP file, the old splash image will still be displayed.

The related-content element has a mandatory href and title attribute.


An indicator as to the type of description. Specificcation is similar to but not limited to what is provided for Java Applets, e. We have a java app which uses Java Web Start.

It includes the original 1. They remain available for archival purposes. The rest of the attributes correspond to the respective HTML applet tag elements.

Can be used to group resources together so that they are downloaded at the same time.

Structure of the JNLP File

An implementation of this specification will support Web deployed applications by enabling distributing an application on a Web server and launching the application from any Web browser.

Description elements are optional. This element can be used to request enhanced permissions. If the element is not specified —i.

An implementation of this specification will support web deployed applications by enabling distributing an application on a web server and spscification the specidication from a web browser. One important element of a successful application deployment is distribution: Defines a system property that will be available through the System.

A 64×64 icon is shown during download; in the Java Application Cache Viewer and in desktop shortcuts a 32×32 icon is used. This attribute must be 1.

How To – Java Web Start

The icons are used to represents the application. Each entry must contain a platform-dependent shared library with the correct naming convention, e. The elements are described in more detail below. Is there a good way to accomplish this? That is not a big problem because the JNLP Client installation can be made automatic, so end users will see the client launcher automatically downloaded and installed before the Java application the first time they launch the latter.


Java Web Start – Wikipedia

The Java 2 SE platform includes support for loading classes from a server specified by a URL, running code in a secure environment sandboxand code signing. The optional progress-class attribute can be used to indicate that the class of this name implements the javax.

A resource definition can be restricted to a specific operating system, architecture, or locale using the osarchand locale attributes. The name of the class containing the public static void main String[] method of the installer. The package and extension elements are not discussed in this developer’s guide. An Example To Be Continued A description element without a kind is used as a default value. Value of the attribute can be 1.