Hosteller.java, Java

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import java.util.*;
import java.lang.*;

public class Student
  {
  static int studentid, departmentID;
  static String name, gender, phone;
  }
public  class Hosteller extends Student
{
static String hostelname
,Yes, No, rn, pn;
static int roomnumber;
static Scanner s=new Scanner (System.in);
public  void getHosteller ()
{
System.out.println("student id");
studentid=s.nextInt();
System.out .println("student name ");
name=s.next();
System.out.println("department id") ;
departmentID=s.nextInt() ;
System.out.println(" gender ");
gender=s.next();
System.out.println(" phone number ");
phone=s.next();
System. out. println("hostel name") ;
hostelname=s.next() ;
System.out.println(" roomnumber ");
roomnumber=s.nextInt();
System.out.println(" Modify room number (Yes/No)");
rn=s.next();
if(Yes.equals(rn))
{
System.out.println("new roomnumber ") ;
rn=s.next() ;
}
System.out.println(" Modify phone number ") ;
pn= s. next() ;
if(Yes.equals(pn)) 
{
System.out.println(" New phone number ") ;
pn=s.next() ;
}
}
}
class Main
{
public static void main (String args[]) 
{
Hosteller h=new Hosteller () ;
System.out.println(" Enter the details ") ;
h.getHosteller() ;
}
}

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Compilation time: 1.13 sec, absolute service time: 1,31 sec