Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Semarang (51% of total searches to Central Java). The next most popular destinations are Surakarta City (26%) and Magelang (13%). Searches for hotels in Purwokerto (11%) are also popular.
KAYAK users have found double rooms in Central Java for as cheap as $9 (Semarang) in the last 3 days. The average price is $34.