# Adding a classpath variable to the build path

To add a classpath variable to the Java build path of a project, follow these steps:

1. Select the project to which you want to add the classpath variable
2. From the project's pop-up menu, select Properties
3. In the Properties page, select the Java Build Path page.
4. On the Libraries tab, click Add Variable for adding a variable that refers to a JAR file.
   The New Variable Classpath Entry dialog appears which shows all available classpath variables.

5. Select a classpath variable then press OK.
   - If the variable resolves to a folder, you can specify a path extension that points to a JAR. To do this press the Extend... button.
   - Press Edit... to create a new classpath variable or edit an existing one.

Hint: You can add multiple variable entries at once to the Java build path: Select more than one variable in the New Variable Classpath Entry dialog, or multiple JAR files in the Variable Extension dialog.

Classpath variables
Build classpath

Attaching source to a class path variable
Creating Java elements
Defining a class path variable
Deleting a class path variable
Viewing and editing a project's build path

Classpath Variables preference page
Build path properties page