Ripping Heroes Lore: Wind of soltia

[Cenoura]

Please, is there anyone who can rip the sprites of the game? or maybe help me how i could do this myself? 
It's a java game for old mobiles, but i have no clue in what i should do to start ripping (as i never did this before, and i'm not familiar with those things).
i attached the jar file of the game(in zip format).

thank you guys.