DalvikVM Vs JavaVM in Android?

Question

In General, Android runs the each App as a seperate process in Dalvik Vm. I got this from the Doc. But i can not understand what is the main reason to go to Dalvik VM for An

Answer 1

Dalvik VM is used in system specially in embedded systems where memory is low and processing speed of processor is not high. Dalvik uses dex files to execute which is converted and zipped version of class files.It is very very small in size roughly less or equal of compressed jar file of same class files.