I apologize, but the knowledge sources provided do not contain specific information on how to fetch a profile property in Java using Mixpanel's Java SDK. The documents mainly focus on setting profile properties, but do not mention how to retrieve or fetch them.
To provide an accurate answer on fetching profile properties in Java, we would need additional documentation or information from Mixpanel's Java SDK. If you need this specific functionality, I recommend checking Mixpanel's official Java SDK documentation or reaching out to Mixpanel's support for the most up-to-date and accurate information.