Is this technique acceptable?

Question

Programming

Greetings. Task: you need to perform an action with numbers that are not in the "forbidden" list.

switch(value) 
{
   case 1,6,2,61,2,612,321: {} // отметаем запрещённые числа для этого действия
   default: 
   {
      // производим действие с любыми другими
   }
}

Answer 1

Add a break to the first case

Answer 2

What is the language?
p.s. i would do that

List<Integer> nums = new ArrayList<>(Arrays.asList(1,6,2,61,2,612,321));
if (nums.contains(value)) {
  //do stuff
}