The subspecies in Java is hylas ie. C. hylas hylas.
http://tpittaway.tripod.com/china/c_hyl.htm

Having said that ,there are two near identical species in your area.
The 2nd species is C. picus.
The definitive ID ,spines on the tibiae of the legs is near impossible to see.
However, the underside of the thorax & legs are tinged orange.

C. hylas. Note underside of thorax & legs are whitish.
http://www.jpmoth.org/~dmoth/Digital...es%20hylas.htm
http://www.ccs-hk.org/DM/butterfly/S...des-hylas.html
http://mw2.google.com/mw-panoramio/p...m/92055747.jpg
http://jdmyeepa.files.wordpress.com/...as-hylas11.jpg

C. picus. Note the underside of thorax & legs are orangey.
http://www.sphin-sea.unibas.ch/Sphin.../Cep_picus.htm
http://sphingidae.myspecies.info/sit..._female_up.jpg
http://sphingidae.myspecies.info/sit..._female_un.jpg

Your 3rd pix should be C. picus.

TL Seow