Please find below a list of KB article with the most common issue for QTP/UFT and Java applications:
- Document ID KM522281 - Java support not loaded for Java applications using JRE/JDK 1.6
- Document ID KM834284 - How to disable QTP java support for specific application
- Document ID KM543247 - Java Add-in configuration crashes (or prevent start/launch of) Java applications (or Oracle)
- Document ID KM182704 - How to load Java support without using the _JAVA_OPTIONS environment variable
Hope this helps.