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A JRE installation can be configured and managed through the Java Control Panel. How to access the Java Control Panel differs per (version of) Operating System, for example:

• Windows: Start > Settings > Control Panel > Java
• OSX: Applications > Utilities > Java Preferences
• Linux (Ubuntu): System > Preferences > Java Plugin Settings.

The Java Control Panel provides functionality to manage and configure a JRE installation

Proxy settings http://www.java.com/en/download/help/5000020600.xml^{Image Removed}Enabling Java consolesettings

When operating behing a proxy, the Java environment can be configured how to retrieve the proxy settings, see the Network settings of the Java Control Panel.

Java console

The Java console is a window that opens when a Java application starts and to which logging/debugging information can be written by the applications. When investigating issues in a Smart Client, enable the Java console to view what logging/debugging information the application provides. See the "Java console" settings under "Advanced" in the Java Control Panel.

Trouble shooting

Problems with Smart Clients fall into different categories and can be caused by a number of different reasons. Below an overview per category, with tip how to investigate the issue investigation guidelines and possible solutions.

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Smart Client starting issues

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Smart Client starting issues can have different causes.

*Accessing the .jnlp file doesn't start Java Web Start*

This means that either Java Web Start is not (properly) installed (see \[#Prerequisites\]) or that the .jnlp extention is not assosiated with Java Web Start.

*Java Web Start error: Problem downloading the application*

webstart issue
raw=true option

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