Formed mostly as the result of volcanic eruptions, Java is the 13th largest island in the world and the fifth largest island in Indonesia. A chain of volcanic mountains forms an east-west spine along the island. It has three main languages, though Javanese is dominant, and it is the native language of about 60 million people in Indonesia, most of whom live on Java. Most of its residents are bilingual, with Indonesian as their first or second languages. While the majority of the people of Java are Muslim, Java has a diverse mixture of religious beliefs, ethnicities, and cultures.

Java is divided into four provinces, West Java, Central Java, East Java, and Banten, and also two special regions, Jakartaand Yogyakarta.

Java is divided into four provinces, West Java, Central Java, East Java, and Banten, and also two special regions, Jakartaand Yogyakarta.