如何调用汽车。java中R的Arima函数并存储预测结果吗?

I'm new to R in Java. I use auto.Arima function of R in Java to forecast my data for 12 periods. but the period of forecast result is ten period. How can I do for 12 periods of forecast? I also want to store result of forecast at an array. This is my code, it can't stop running and I am getting error messages.I'm new to R in Java. I use auto.Arima function