------------------------- Collections | ------------------------- # ÓÃÓÚ²Ù×÷ Set,List,Map µÄ¾²Ì¬¹¤¾ßÀà ------------------------- Collections-¾²Ì¬×Ö¶Î/·½·¨| ------------------------- boolean addAll(Collection super T> c, T... elements) * °Ñ±ä³¤Êý¾Ý¶¼´æÈëc