Randomize between two pictures

I’m building a program and I’m stuck at picking a random image that already is defined in the program.

Here’s the code:

Image Opic = new Image(getClass().getResourceAsStream("Resource/O1.png"));
Image Xpic = new Image(getClass().getResourceAsStream("Resource/X1.png"));
Image PlayerPic = new Random[Opic,Xpic];
Image AiPic = new Random[Opic,Xpic];