How do i pass a class type into a function

Processing Coding Questions
5

okay ignoring the weird spawner design, say i want a function that uses instanceof or some similar comparison that checks the class type of an object. i want to use this function to look through an arraylist of objects and count ow many there are of a subclass. what would i pass into the function if i wanted to vary which kind of class type it counted. ie

int count(ArrayList<BaseClass> list,??? subclass /*what do i put here*/ ){
   int n = 0;
    for(int i = 0;i < list.size();i ++){
      if(list.get(i) instanceof subclass){
         n++;
      }
   }
   return n;
}