[Java novice] It's a very simple question while studying Java.

Question 1. I was reading a Java book

   if(min>v) = min = x; 

I thought about a line of code, but I don't know why you skipped {} instead of if(min>v) {min=x};.

Question 2.

 invite (new ArrayList<String>() { { add("Harry"); add("Tony"); } } )

As far as I know, when using the anonymous class, use {} only once to describe the method and data inside. However, I don't understand why the above code used {} #2{}.

Please give me a good answer.