java - Use of recordAccess(this) in Entry<K, V> class -

while having inside hashmap class, came across method :-

    /**      * method invoked whenever value in entry      * overwritten invocation of put(k,v) key k that's      * in hashmap.      */     void recordaccess(hashmap<k,v> m) {     } 

actually, method defined inside inner class of entry<k, v>

i'm not able make out of comment. method ?

ps : can see method being called inside's hashmap's putfornullkey() method

 private v putfornullkey(v value) {         (entry<k,v> e = table[0]; e != null; e = e.next) {             if (e.key == null) {                 v oldvalue = e.value;                 e.value = value;                 e.recordaccess(this); // call                 return oldvalue;             }         }         modcount++;         addentry(0, null, value, 0);         return null;     } 

update : i've updated first code snippet.

a linkedhashmap can have 2 orders: insertion order, or access order. if access order used, method makes sure accessed entry moved beginning of list.