# JRE installations

Classpath Variable Preferences
Option | Description
--- | ---
Add... | Adds a new JRE definition to the workbench. In the resulting dialog, specify the following: JRE type: (select a VM type from the drop-down list) JRE name: Type a name for this JRE definition JRE home directory: Type or browse to select the root directory for this JRE installation Javadoc URL: Type or browse to select the URL location. The location is used by the Javadoc export wizard as a default value and by the 'Open External Javadoc' action. Debugger timeout: Type the default timeout for this JRE's debugger (in ms) Either check the box to use the default library locations for this JRE or clear the checkbox and type or browse to select library locations for the following: JAR file (e.g., classes.zip) Source file (e.g., source.zip) You can click the Browse buttons to browse for paths.
Edit... | Allows you to edit the selected JRE.
Remove | Removes the selected JRE from the workbench.
Search... | Automatically searches for JREs installed in the local file system and creates corresponding JRE definitions in the workspace.

Classpath variables

Working with JREs

Source Attachment