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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Now, you will see how specificatiom works. The version of the application being launched, as well as the version of the JNLP file itself. The jar and nativelib elements also allow a resource to be specified as lazy. Can be used to indicate an application’s preference for where to place the menu item. The main-class attribute is used instead of the code attribute.
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The shortcut element can be used to indicate an application’s preferences for desktop integration. The update element is used to indicate the preferences for how application updates should be handled by the JNLP Client. 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.
Dpecification kind attribute defines how the description should be used. The update element is used to indicate the preferences for how application updates should be handled by Java Web Start.
Indicates the suggested use of the icon, can be: If this element is included, either the offline-allowed element must also be included, or the href attribute must be set for the jnlp element.
October Learn how and when to remove this template message. You will see this file better in the second article of this tutorial.
If the association element is included, either the offline-allowed element must also be included, or the href attribute must be set for the jnlp element to ensure that the application can be located and run. The elements are described in more detail below. A description element without a kind is used as a default value. specifciation
The name of the class containing the public static void main String method of the application. The name of the class containing the public static void main String method of the installer. Spdcification following example will specifically match “Windows Vista” and “Windows 7”:.
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Describes an additional piece of related content that may be integrated with the application. The application is responsible for doing the actual call to System.
A platform version will not normally contain a micro version number; e. Specifiaction the name of a part that can be expected to be found in the extension. A specifjcation icon is shown during download; in the Java Application Cache Viewer and in desktop shortcuts a 32×32 icon is used. Oracle will begin encouraging application developers and users to transition away from Java Web Start and encourage non-commercial consumers to remove any unused or non-supported Oracle JRE installations from their desktops.
Specifies a JAR file that is part of the application’s classpath. End specifucation may ask “What’s that screen that appears?
That would be great. Related Resources Store Articles Blogs. A value of “background” means to launch the application while checking for updates in the background. The property element defines a system property that will be available through the System. Denotes this is the jnlp file for a component extension.
Arguments can be specified to the application by including xpecification or more nested argument elements. Indicates that this application can operate when the client system is disconnected from the network.
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All JAR files must be signed. A URL pointing to the icon file, may be in one of the following formats: 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.