Where is java and sumatra located?

Java and Sumatra are two of the largest islands of Indonesia. They are located in the western part of the Indonesian archipelago. Java, the fifth-largest island in the world, is situated between Sumatra and Bali, and is the most densely populated island in the country. Sumatra, the sixth-largest island in the world, is located to the west of Java and is separated from it by the Sunda Strait.