Question

Please give the code without errors

Define a class named Doctor whose objects are records for a clinic's doctors. Derive this class from the class Person given in Listing 8.1. It's also posted here in this module. A Doctor record has the doctor's name-defined in the class Person,-a specialty as a String (Pediatrician, Obstetrician, General Practitioner, and so on--these are just examples. The type is String.), and an office-visit fee (use the type double). Give your class a constructor and one accessor method and one mutator method. Also create a toString method. Write a test program that tests all your methods.

Answer 1

HELLO!!

EXPLANATION:

• A Person class is created with name as its attribute
• A constructor to assign value to name
• A Doctor class is derived from the Personn class
• Doctor class contains attributes specialty and fee
• A constructor is created to assign its attributes and call the super class constructor to assign its values
• It contains one accessor method and one mutator method
• it contains a toString method
• A class named DoctorTest is created which includes the main method
• In this main method user input is taken with suitable messge displayed
• and all the methods called through object creation to Doctor class

CODE:

import java.util.Scanner; //importing Scanner class
class Person   //super class
{
 String name;  //declaring variables
 Person(String s){        //constructor to assign values to the variables
    name=s;
  }
}
class Doctor extends Person  //sub class
{
  String specialty;   //attributes
  double fee;
  Doctor(String s1,String sp,double f)   //constructor assing values to the attributes
    {
      super(s1);                       //calling the super class constructor and passing a string parameter
      specialty=sp;
      fee=f;
    }
  void setFee(double f1)               //a setter method
{
    fee=f1;
}
double getFee()                        //a getter method
{
  return fee;
} 
public String toString(){                //to string method
  return (name+" "+specialty+" "+fee);
  }
}
class DoctorTest         //class with main method
{
 public static void main(String args[]){
Scanner sc=new Scanner(System.in);              //instance to scanner class
System.out.println("Enter the doctors name: ");       
String n1=sc.next();                             //promts the user to enter
System.out.println("Enter the doctor's specialty: ");
String n2=sc.next();                                  //promts the user to enter
System.out.println("Enter office visit fee: ");
double f1=sc.nextDouble();                            //promts the user to enter

 Doctor d=new Doctor(n1,n2,f1);                      //object creation 
System.out.println(d.toString());                    //prints the return of tostring method
d.setFee(f1);                                        //calling setFee method
System.out.println("Doctor's fee is: "+(d.getFee()));//printing the return of getFee method
}
}

OUTPUT:

C:\Users\MOHAN>javac DoctorTest.java C:\Users\MOHAN>java DoctorTest Enter the doctors name: Naveen Enter the doctor's specialty: Pediatrician Enter office visit fee: 1000 Naveen Pediatrician 1000.0 Doctor's fee is: 1000.0