New problems when static methods invoke internal classes

 Packagetool;/*** New problem when static method calls internal class*/ Public classAA {//Static Methods//static method New has a problem     Public Static voidaa () {BB b=NewBB ();//ErrorBB B1 =NewAA ().NewBB ();//no problem.//Workaround        /** 1. The inner class is set to static class * 2. The inner class new way bb b = new AA (). New BB () **/    }    //non-static method direct new, no problem     Public voidcc () {BB b=NewBB (); }    //Internal class BB    classBB {Private intb;  Public intGetb () {returnb; }         Public voidSETB (intb) { This. B =b; }    }}

New problems when static methods invoke internal classes