How can I obtain vertex array of 3D Molde (.obj)?

Hello guys, 

I am newbie on Vuforia. I am making an android application and want to change teapot for image target. I read many post about "Replacement of Teapot" but I understood it partically. I found some free 3D models(.obj) and opened it with notepad to get vertex arrays of model. There are many float numbers in mix form. I know that, I should change the vertex of teapot.java with new one. But I do not know how I do. I am not using NDK. How can I do it? And am I on right way?