missing androiddevelopmentplayer\bin\classes.jar

Hello. I am trying to make a java plugin for unity3d. I need to find this file. classes.jar

C:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\androiddevelopmentplayer\bin\classes.jar

I have this folder

C:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\androiddevelopmentplayer\

or

C:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\androidplayer\

They dont contain a bin folder or a classes.jar in the bin.

I dont know what to do I looked everywhere please help. Bye.

They have changed the folder structure and now the classes.jar is here :

C:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\mono\Development\Classes\classes.jar

C:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\mono\Release\Classes\classes.jar

I don’t know which is what and hope someone from Untiy Technologies come here and tell us the difference.