I know this picture is blurred, but can anyone give me the idea of the code?

   boolean code() {
       int idx = -1;
      
       int completed=0;
      
       ArrayList<Integer> watchList
= new ArrayList<Integer>();
      
       // populateWatchlist
       // Please write your method to
populate the watchlist
      
       // if completed is found in
watchlist, Its index is returned
       // else -1 is returned which is
kept in idx.
       idx =
watchList.indexOf(completed);
      
       // if idx=-1, return false
       if(idx == -1)
           return
false;
      
       // media Selection object should be
a type of element type,
       // because we need to store the
removed element.
       // hence taking type of
MediaSelection object as Integer here
       Integer ms;
       ms = watchList.remove(idx);
      
       // if ms is serializable
       if(ms.isSerialized()) {
           // add ms to the
start of the watchlist
           // 0 represents
that we are adding the element at the start
           watchList.add(0,
ms);
       }
      
       // return true finally
       return true;
   }

I have tried the code in Java, which can give you fairly good idea
of the code.