Geography

Java lies between Sumatra to the west and Bali to the east. Borneo lies to the north and Christmas Island to the south. It is the world's 13th largest island.

Java is almost entirely of volcanic origin; it contains no fewer than thirty-eight mountains forming an east-west spine which have at one time or another been active volcanoes. The highest volcano in Java is Mount Semeru (3,676 m). The most active volcano in Java and also in Indonesia is Mount Merapi (2,968 m). See Volcanoes of Java. Further mountains and highlands help to split the interior into a series of relatively isolated regions suitable for wet-rice cultivation; the rice lands of Java are among the richest in the world. Java was the first place where Indonesian coffee was grown, starting in 1699. Today, Coffea arabica is grown on the Ijen Plateau by small-holders and larger plantations.

The area of Java is approximately 139,000 km2. The island's longest river is the 600 km long Bengawan Solo River. The river rises from its source in central Java at the Lawu volcano, then flows north and eastwards to its mouth in the Java Sea near the city of Surabaya. The island is administratively divided into four provinces (Banten, West Java, Central Java, and East Java), one special region (Yogyakarta), and one special capital district (Jakarta).