If you chose PROXY_HTTP as the proxy, click that name to put it into the Proxy field.
Four fields then appear below the Proxy field, on the right side of the Rule Definition dialog window. The first three fields are:
Choose an action for Cookies, ActiveX, and SSL, or accept the default under Proxy Details.
The last field is Java. Click the button by the Java field, and choose the type of Java you will permit under Proxy Details:
Allow all Java
Block all Java
Allow both signed Jar signature and Jar Hash.
If you selected Jar Signature or Jar Hash, they must be defined in the Common Objects area of the Policy Rules page.