Final answer:
The program that uses Java is MHS Genesis, which is designed to provide a comprehensive health record for the Military Health System. AHLTA and CHCS are older systems with different technologies.
Step-by-step explanation:
The appointing and orders program that uses Java is MHS Genesis. The other options, which are AHLTA, CHCS, and ALHTA, have different underlying technologies. MHS Genesis is a modern electronic health record for the Military Health System, designed to provide a single health record for service members, veterans, and their families. AHLTA is the legacy system that MHS Genesis is replacing, and CHCS is the Composite Health Care System that was used prior to AHLTA. ALHTA appears to be a typographical error and may refer to AHLTA or another unknown system.