Java is an island in Indonesia and the most populated island in the world. The capital of Indonesia is Jakarta, which is located on the northwest coast of Java. Other large cities on Java include Surabaya and Bandung. Java is a volcanic island and has many active volcanoes, including Mount Merapi, which is one of the most active volcanoes in the world. Java is a very fertile island and is known for its tea plantations and rice paddies.