lambda - how to operate two adjacent objects in java8 function style,change below codes -


the latter staffoperinfo object need compare former one,how change below code java8 style?my english poor,i hope not mind, thanks!

        staffoperinfo before = null;         (staffoperinfo : staffmap.get(staffid)) {             if (before == null) {                 before = so;             } else {                 if (so.gettermip()!=null&&!so.gettermip().equals(before.gettermip())                          && so.getacceptdate().gettime()-                         before.getacceptdate().gettime()<step*1000) {                     if (filtermap.containskey(staffid)) {                         filtermap.get(staffid).add(before);                         filtermap.get(staffid).add(so);                     } else {                         list<staffoperinfo> ll = new arraylist<>();                         ll.add(before);                         ll.add(so);                         filtermap.put(staffid, ll);                     }                 }                 before = so;             }         }

streams won't make code better. said below 1 of way of doing if collection list or array(if not, wont work):

list<staffoperinfo> list = staffmap.get(staffid); intstream.range(1, list.size() - 1) // stream on indices of list         .maptoobj(i -> new staffoperinfo[]{list.get(i - 1), list.get(i)})  //  pair of staffoperinfo         .filter(arr -> !objects.equals(arr[0].gettermip(), arr[1].gettermip()) // filter pairs based on if condition                 && (arr[1].getacceptdate().gettime() - arr[0].getacceptdate().gettime() < step * 1000))         .foreach(arr -> {             if (filtermap.containskey(staffid))                 filtermap.get(staffid).addall(arrays.aslist(arr));             else                 filtermap.put(staffid, arrays.aslist(arr));         });

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