importstaticmy.MyCode.*;importjava.util.*;importmy.*;interfaceA{，publicvoidf();}classBimplementsA{，publicvoidf(){}，publicvoidg(){}，publicStringtoString(){，return"mynameisB";，}}classTest{，publicstaticvoidprintln(Objects){，System.out.println(s);，}，protectedvoidf(){，println("Test");，}，publicstaticvoidmain(String[]args){，Aa=newB();，println(a.toString());//編譯成功，//a.g();//編譯error，}}