Isobject createobject javawebstart isinstalled

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 8 years, 2 months ago. Active 8 years, 2 months ago. Viewed times. How exactly is it "not working"? What happens when you remove the On Error Resume Next? It will not show the content in IE10 and it will show in IE8.

This service makes it possible for users to verify that an application comes from a trusted source. Because the application service provider signs the code, both can be ensured that no other party can impersonate the application on the Web.

A signed application that is trusted by the user can also request additional system privileges, such as access to a local disk. Java Web Start presents a dialog displaying the application's origin, based on the signer's certificate, before the application is launched. Thereby allowing the user to make an informed decision whether to grant additional privileges to the downloaded code, or not. The documentation for the jarsigner tool provides examples on how to sign code, create test certificates, and other signing related issues.

Create a new key in a new keystore as follows: keytool -genkey -keystore myKeystore -alias myself You will get prompted for a information about the new key, such as password, name, etc. This will create the myKeystore file on disk. Then, create a self-signed test certificate as follows: keytool -selfcert -alias myself -keystore myKeystore This will prompt for the password.

Generating the certificate takes a few minutes. Check to make sure that everything is ok. Please note that a self-signed test certificate should only be used for internal testing, since it does not provide any guarantees about the identity of the user and therefore cannot be trusted. A trust-worthy certificate can be obtained from a certificate authority, such as VeriSign, and should be used when the application is put into production.

See the J2SE documentation for a list of supported encodings. Below is a list of the most common modifications that needs to be applied to a 0. Rename the unrestricted element to all-permissions. Rename the jre element to j2se and move this element inside the resources element i. Converting JNLP files used with the 1. This document describes the most commonly used elements of the JNLP file. Refer to the specification for a complete description of the format. The root element is jnlp , which has four subelements: information , security , resources , and application-desc.

In addition, Java Web Start also supports launching Applets by using the applet-desc element. The elements are described in more detail below. The default value is "1. Thus, it can typically be omited.

Java Web Start requires this attribute to be set in order for the application to be included in the Application Manager. The Information Element title element: The name of the application. It is used by the Application Manager to point the user to a Web page where they can find more information about the application.

Description elements are optional. The kind attribute defines how the description should be used, it can have one of the following values: one-line : If a reference to the application is going to appear on one row in a list or a table, this description will be used.

Only one description element of each kind can be specified. A description element without a kind is used as a default value. Thus, if Java Web Start needs a description of kind short, and it is not specified in the JNLP file, then the text from the description without an attribute is used All descriptions contain plain text.

No formatting, such as HTML tags is supported. The icons are used to represents the application when Java Web Start presents the application to the user during launch, in the Application Manager, and in desktop shortcuts. A 64x64 icon is shown during download and a 32x32 for desktop icons and in the application manager. Java Web Start automatically resizes an icon to the appropriate size. Optional width and height attributes can be used to indicate the size of the images.

Splash images will be surrounded by a border defined by Java Web Start. 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 new splash image will appear on the second and subsequent launches of the application.

Applications that are not marked offline in the JNLP file will not be able to be launched through the Application Manager, if the offline checkbox is checked. The default is that an application only works if the client system is online. Developing applications for deployment with JWS is generally the same as developing stand-alone applications for the Java 2 platform. For instance, the entry point for the application is this standard code:. However, in order to support Web deployment—automatic download and launching of an application—and to ensure that an application can run in a secure sandbox, there are some additional considerations, which include:.

JWS is built on top of the Java 2 platform, which provides a comprehensive security architecture. JWS also includes strong security features in Java 6. Applications launched with JWS will, by default, run in a restricted environment a "sandbox" with limited access to local computing resources, such as storage devices and the local network. In this sandbox environment, JWS can guarantee that a downloaded and potentially untrusted application cannot compromise the security of the local files or the network.

An application can request unrestricted access to your system. In this case, JWS will display a Security Warning dialog box when the application is launched for the first time. The security warning will show information about the vendor that developed the application.

If an application being invoked is delivered in one or more signed JAR files, JWS will verify that the contents of the JAR file have not been modified since they were signed. If verification of a digital signature fails, JWS will not run the application, since it may have been compromised by a third-party. They remain available for archival purposes.

Detecting if Java Web Start is installed on Netscape. Launching the application if Java Web Start is Installed—or providing a link for auto-install or general download page. The following information predates the introduction of the Deployment Toolkit script in the Java SE 6 update 10 release.

It may be the case, however, that Java Web Start is not installed on the user's computer. Thus the page needs to include logic scripts to take account of this. In fact, the page should include logic for the following:.