# Configuring the tJava component

## Procedure

1. Double-click on tJava to display its Component view.
2. In the Basic settings tab, enter your code, as in the screenshot below. The code allows you to check whether the character string pertains to an e-mail address, based on the regular expression: "^[\\w\_.-]+@[\\w\_.-]+\\.[\\w]+$".

   ![](https://help.qlik.com/talend/en-US/components/7.3/Resources/images/Use_Case_tLibraryLoad3.png)