ͻ񻣼
LinkedHashMapÊÇMap½Ó¿ÚµÄ¹þÏ£±íºÍÁ´½ÓÁбíʵÏÖ£¬¾ßÓпÉÔ¤ÖªµÄµü´ú˳Ðò¡£´ËʵÏÖÌṩËùÓпÉÑ¡µÄÓ³Éä²Ù×÷£¬²¢ÔÊÐíʹÓÃnullÖµºÍnull¼ü¡£´ËÀ಻±£Ö¤Ó³ÉäµÄ˳Ðò£¬ÌرðÊÇËü²»±£Ö¤¸Ã˳Ðòºã¾Ã²»±ä£¬ LinkedHashMapʵÏÖÓëHashMapµÄ²»Í¬Ö®´¦ÔÚÓÚ£¬ºóÕßά»¤×ÅÒ»¸öÔËÐÐÓÚËùÓÐÌõÄ¿µÄË«ÖØÁ´ ÔĶÁÈ«ÎÄ
ͻ񻣼
HashMap£º»ùÓÚ¹þÏ£±íʵÏÖ£¬ÊÊÓÃÓÚÔÚMapÖвåÈ롢ɾ³ýºÍ¶¨Î»ÔªËØ¡£Ê¹ÓÃHashMapÒªÇóÌí¼ÓµÄ¼üÀàÃ÷È·¶¨ÒåÁËhashCode()ºÍequals()[¿ÉÒÔÖØдhashCode()ºÍequals()]£¬ÎªÁËÓÅ»¯HashMap¿Õ¼äµÄʹÓã¬Äú¿ÉÒÔµ÷ÓųõʼÈÝÁ¿ºÍ¸ºÔØÒò×Ó¡£ (1)HashMap(): ¹¹½¨ ÔĶÁÈ«ÎÄ
ͻ񻣼
ÓÅÏȶÓÁÐPriorityQueueÊÇQueue½Ó¿ÚµÄʵÏÖ£¬¿ÉÒÔ¶ÔÆäÖÐÔªËؽøÐÐÅÅÐò£¬ ¿ÉÒÔ·Å»ù±¾Êý¾ÝÀàÐ͵İü×°ÀࣨÈ磺Integer£¬LongµÈ£©»ò×Ô¶¨ÒåµÄÀà ¶ÔÓÚ»ù±¾Êý¾ÝÀàÐ͵İü×°Æ÷À࣬ÓÅÏȶÓÁÐÖÐÔªËØĬÈÏÅÅÁÐ˳ÐòÊÇÉýÐòÅÅÁÐ µ«¶ÔÓÚ×Ô¼º¶¨ÒåµÄÀàÀ´Ëµ£¬ÐèÒª×Ô¼º¶¨Òå±È½ÏÆ÷ ¶þ¡¢³£Ó÷½·¨ peek()//·µ ÔĶÁÈ«ÎÄ