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提问者：diane丶爱你  |  浏览 次  |  提问时间：2017-02-26  |  回答数量：2

package example1; class Speciality extends Doctor {   String speciality;   Speciality(String name,String idNumber,String address,String speciality){     super(name,idNumber,address);     this.speciality = speciality;   }   void show1() {     System.out.println(\"专业:\"+speciality);   } } class NonSpecialist extends Doctor {   NonSpecialist(String name,String idNumber,String address){     super(name,idNumber,address);   } } public class Doctor {   String name;   String idNumber;   String address;