Create nifi project using java

[#1]

Hi everyone 
So I'm an intern and it's my first time using apache NiFi. I wonder if there is any way to create a whole apache NiFi project using java: i.e: I have a button in java I need a code that able me to when I press this button a processor will be dragged and dropped in apache NiFi UI !!
Is it possible ??

if it is, how can we make it?