I have a J2 visa and I just move to the US (my wife, J1, is a resident alien): am I resident alien or non resident alien for tax purposes?

Hello. My wife is a J1 student visa holder who is resident alien for tax purposes since she has lived in the US for more than 6 years. I am a J2 visa holder who moved to the US in 2015 and I have been working in California since January 2015. Am I resident alien or non resident alien for tax purposes?