Java中接口为什么可以调用toString方法，接口中根本就没有toString方法？ – 网络|

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());//编译成功，//a.g();//编译error，}}