創建內容類的方式通過外部類的實例對象來創建
public class AA { int a =1; class BB { int b=3 ; } public static void main(String[] args) { AA a =new AA(); BB b=a.new BB(); System.out.println(a.a); System.out.println(b.b); } }
public class AA { int a =1; static class BB { int b=3 ; } public static void main(String[] args) { AA a =new AA(); BB b=new AA.BB(); System.out.println(a.a); System.out.println(b.b); } }