Final answer:
Most fossils found in Java belong to Homo erectus, dating between 1.6 and 1 mya, offering considerable information on early human evolution.
Step-by-step explanation:
It is generally accepted that most of the fossils found in Java belong to the Homo erectus and are between 1.6 and 1 million years old (mya). This species is an important part of human evolution, representing an early hominid that was one of the first to have humanlike body proportions and the ability to walk upright consistently.
Java part of the Indonesian archipelago has been a significant site for paleoanthropology yielding numerous fossil discoveries that provide insights into the adaptations and dispersal of early human ancestors.