Microsoft Internet Explorer uses the default file associations
defined for the Microsoft Windows operating system to determine how
to handle JNLP (Java™ Network
Launch Protocol) files. By defining or modifying the default file
application associated with processing JNLP files, you can redirect
Internet Explorer to use the correct Java Web Start version. If you
have multiple versions of Java installed, modifying this setting can
prevent problems with opening the Visualizer.
About this task
This procedure directs Internet Explorer to use the Java
Web Start version to open all Web applications. If you run other Web
Start applications that require later versions of Java, use the direct
launch approach instead.
Note: There are a couple of known issues
with Java version 1.6 to keep in mind:
- Java version 1.6 sometimes overrides the default Windows file
association for JNLP files. If you use Java version 1.6 as your system
JVM (Java Virtual Machine) and these steps do not allow you to successfully
start and open the Visualizer, either try using another Web browser
to launch the Visualizer, or use the direct launch approach instead.
- If your workstation uses Java version 1.6, you may also need to
configure the JRE (Java Runtime Environment) to accept automatic downloads.
If your workstation has this issue, when you try to start the Visualizer,
you will see an error message indicating that the application has
requested a version of JRE that is not locally installed.
- From the Windows Control Panel,
do one of the following steps:
- From the Category View, double-click Performance
and Maintenance. From the See Also navigation
pane in the upper-left corner of the window, select File
Types.
- From the Classic View, double-click Folder Options.
- From the Folders Options dialog,
click the File Types tab.
- Under the Extensions column, locate and select the JNLP entry. Entries are alphabetized by extension.
Note: If the JNLP entry
does not exist, click New to create the entry.
- Click Change.
- From the Open With dialog, make
sure that Java WebStart Executable is selected.
Click Browse to navigate to your installed
Java directory.
- Select the executable file named javaws and
click OK.
- Click OK to close the Folder
Options dialog. (You can also close theControl
Panel window.)
Results
Internet Explorer now uses the associated Java Web Start file
to successfully process and open the Visualizer.