How can I set wrap_content layout using this code?

Question

FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(400, 400);
params.gravity = Gravity.TOP|Gravity.RIGHT;
linearLayout.setLayoutParams(params);

I am using this code but I want that I am using this code but I want that 400, replace with wrap_content.

I want to replace 400 to wrap_content using Java code