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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Everything is contained within the jnlp element.

The application element indicates that the JNLP file is launching an application as opposed to an applet. For a complete description of the format, refer to the specification.

Contains a list of file extensions separated by spaces that the application requests it be registered to handle. If you don’t know about XML, try specificatiom site: Thus, it is guaranteed that the user always runs the latest version of the application. The components of this infrastructure are likely to include:.

Java Web Start

Java Web Start automatically resizes an icon to the appropriate size. Specifies the architecture for which the resources element should be considered. Sign up using Facebook. It includes the original 1.

Some Java programs may need some platform-specific support for running. If offline-allowed is specified, then the application can be launched offline by the Java Application Cache Viewer, and shortcuts can be created which launch the application offline. The main-class attribute is used instead of the code attribute. A 64×64 icon is shown during download; in the Java Application Cache Viewer and in desktop shortcuts a 32×32 icon is used.


A URL pointing to where more information on this application can be found. Thus, it is guaranteed that the user always runs the latest version of the application.

The Java Community Process(SM) Program – JSRs: Java Specification Requests – detail JSR# 56

The application is asking that this content be included in its desktop integration. But publishers can remove these restrictions by signing their Web Start applications with the jarsigner tool that comes with the JDK. Articles containing potentially dated statements from All articles containing potentially dated statements All Wikipedia articles needing clarification Wikipedia articles needing clarification from April Articles needing additional references from October All articles needing additional references Articles with Curlie links.

Avoiding Unnecessary Update Checks. An applet is launched using the applet-desc element instead of the application-desc element. Each sandbox application is run in a restricted execution environment, similar to the Applet sandbox.

This document describes the most commonly used elements of a JNLP file. The root element is jnlpwhich has four subelements: They remain available for archival purposes.

A JNLP file must contain one of the following: An installer extension is typically used to install platform specific native code that requires a more complicated setup than simply loading a native library into the VM.

All JAR files must be signed. The application element has an optional attribute, main-classwhich can be used to specify the name of the application’s main class, i.

At runtime, the os values are compared with the beginning of the os. It can be always, prompt-update, or prompt-run. Can specificagion used to request enhanced permissions. Web Start has an advantage over applets in that it overcomes many compatibility problems with browsers’ Java plugins and different JVM versions. specifkcation


Java Web Start – Wikipedia

The application, however, can be run offline. Specifies the platform for which this information element should be considered. The application, however, must be run online. It speicfication contain any of the following two sub-elements:.

Now, we have requirement where the app should be restricted to run only within the range – JRE 1. The JNLP Server is usually implemented by a servlet, and is used only for some advanced features of the protocol. The main-class attribute is assigned the name of the Applet class without the. These documentation pages are no longer current.

Defines a system property that will be available through the System. Optional width and height attributes can be used to indicate the size of the images. Package name contained in the jar files of the given part. Indicates if this jar contains the class containing the main method of the application. The optional related-content element jnll an additional piece of related content, such as a readme file, help pages, or links to registration pages, as a hint to a JNLP Client. If several JREs are specified, this indicates a prioritized list of the supported JREs, with the most preferred version first.

No existing specification addresses the issue of launching an application from a web-browser or delivering an application on a web-server.