JIFFIE: Java InterFace For Internet Explorer is a library which allows Internet Explorer to be controlled from Java. It uses the Jacob JNI-to-COMbridge to provide this control. JIFFIE is designed to support web application testing.
JCom is a bridge library between Java and Com to enable COM object access from Java classes.
Example: Creating an Excel worksheet, or using Visual Basic COM application from a Java application. See also this alternative http://com4j.kohsuke.org/