What does “?” mean in Java? [duplicate]

Answer 1

"? :" is a ternary operator equivalent to an if else statement.

In your example:

   pinsToTake = (min >= 2) ? 2 : 1 

if min >= 2 then assign 2 to pinsToTake, else assign 1

Answer 2

it means:

if(min >= 2) 
   someval =2;
else 
   someval =1

Its called a ternary operator See this java example too

Answer 3

max = (a > b) ? a : b;

(a > b) ? a : b; is an expression which returns one of two values, a or b.
The condition, (a > b), is tested. If it is true the first value, a, is returned. If it is false, the second value, b, is returned.
Whichever value is returned is dependent on the conditional test, a > b. The condition can be any expression which returns a boolean value.