Inner class Class Outer : Nm pha bn ngoi cha mt class Inner class Class Inner : Nm bn trong mt class Outer hoc trong mt phng thc Class Inner nm ngang hang vi phng thc trong class Outer v c mt phng thc rin S dng Class Inner: i tng gi ti i tng trong Outer ri mi gi ti Inter. Ni chung l gi phng thc ca phng thc Class ngang hang vi class Outer mun s dng class Inter th s[Outer.Inner] in = new Outer().new Inter(); Ri sau gi phng thc trong class Inner. Kt lun Trong mt class th lun c mt phng thc Trong phng thc c th khi to i tng gi ti class Inner. Hm main th phng thc khi to l tnh. Trong mt class gm (Phng thc + Thuc tnh ) lun nh l vy v sau c ly phng thc ra c th khng c thuc tnh ri trong phng thc ta c th to ra cc i tng bng ton t NEW s tha k hm trong bng vic ly hm contractor. Nh vy trong mt class khng th khng c phng thc.Tnh thc cht l khng cn to ra mt th hin ca i tng v c th truy xut trc tip phng thc thng qua tn class v cc thuc tnh ca phng thc static phi l static.