------------------------- Comparator | ------------------------- # ÊÇÒ»¸ö½Ó¿Ú # int compare(Object obj) * Åж϶ÔÏóÊÇ·ñÏàµÈ,Ò»°ã×÷ΪһЩ¼¯ºÏ¿ò¼ÜµÄ±È½ÏÆ÷