What is the call to this method

Question

I have a method that calculates the difference between two dates; todays date and a returndate for Library-books. I have a instance-method with the get-method mentioned below. But I can't figure out what call I must use so the program runs properly. Any hints ?
See code below.
import java.io.*;
import java.util.*;
import java.text.*;
public class DateGet{
public static void main(String[] args) throws IOException, ParseException{
System.out.print(LabMetoder.numberOfDays(days));
//This call is wrong, what should I write ?
}// end main
public static int numberOfDays (int days) {  
String aLine, returnDate;
Date today = new Date(); // gets todays date
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
Book checkDate;
Scanner fin = new Scanner (new FileReader("book.txt")); //open infile
while (fin.hasNext()) {
aLine=fin.nextLine();//reads first line
checkDate = new Book (aLine);//creates object
if (checkDate.getReturnDate()!=null) { // checks that returnDate-field
// isn't empty
String oldDay = (checkDate.getReturnDate());
Date oldDayD = dateFormat.parse(oldDay); //changes oldDay to a
//Dateobject
days = (int)( (today.getTime() - oldDayD.getTime())/
(1000*60*60*24));
//Calculates the difference between todays date and returnDate System.out.println(days);//writes dateobject on screen (this is
          // a check)
} //end if
}// end while
fin.close(); //closes book.txt
return days;
}//end NumberOfDays

Answer 1

I have a method that calculates the difference
between two dates; todays date and a returndate for
Library-books. I have a instance-method with the
get-method mentioned below. But I can't figure out
what call I must use so the program runs properly.
Any hints ?
See code below.
import java.io.*;
import java.util.*;
import java.text.*;
public class DateGet{
public static void main(String[] args) throws
IOException, ParseException{
System.out.print(LabMetoder.numberOfDays(days));
//This call is wrong, what should I write ?
}// end main
public static int numberOfDays (int days) {  
String aLine, returnDate;
Date today = new Date(); // gets todays date
SimpleDateFormat dateFormat = new
SimpleDateFormat("yyyyMMdd");
Book checkDate;
Scanner fin = new Scanner (new
FileReader("book.txt")); //open infile
while (fin.hasNext()) {
aLine=fin.nextLine();//reads first line
checkDate = new Book (aLine);//creates object
if (checkDate.getReturnDate()!=null) { // checks that
returnDate-field
// isn't empty
String oldDay = (checkDate.getReturnDate());
Date oldDayD = dateFormat.parse(oldDay); //changes
oldDay to a
//Dateobject
days = (int)( (today.getTime() - oldDayD.getTime())/
(1000*60*60*24));
//Calculates the difference between todays date and
returnDate System.out.println(days);//writes
dateobject on screen (this is
          // a check)
} //end if
}// end while
fin.close(); //closes book.txt
return days;
}//end NumberOfDays
I have a method that calculates the difference
between two dates; todays date and a returndate for
Library-books. I have a instance-method with the
get-method mentioned below. But I can't figure out
what call I must use so the program runs properly.
Any hints ?
See code below.
import java.io.*;
import java.util.*;
import java.text.*;
public class DateGet{
public static void main(String[] args) throws
IOException, ParseException{
System.out.print(LabMetoder.numberOfDays(days));
//This call is wrong, what should I write ?
}// end main
public static int numberOfDays (int days) {  
String aLine, returnDate;
Date today = new Date(); // gets todays date
SimpleDateFormat dateFormat = new
SimpleDateFormat("yyyyMMdd");
Book checkDate;
Scanner fin = new Scanner (new
FileReader("book.txt")); //open infile
while (fin.hasNext()) {
aLine=fin.nextLine();//reads first line
checkDate = new Book (aLine);//creates object
if (checkDate.getReturnDate()!=null) { // checks that
returnDate-field
// isn't empty
String oldDay = (checkDate.getReturnDate());
Date oldDayD = dateFormat.parse(oldDay); //changes
oldDay to a
//Dateobject
days = (int)( (today.getTime() - oldDayD.getTime())/
(1000*60*60*24));
//Calculates the difference between todays date and
returnDate System.out.println(days);//writes
dateobject on screen (this is
          // a check)
} //end if
}// end while
fin.close(); //closes book.txt
return days;
}//end NumberOfDaysOK, here is the message again. Thanks.
I have a method that calculates the difference between two dates; todays date and a returndate for Library-books. I have a instance-method with the get-method mentioned below. But I can't figure out what call I must use so the program runs properly. Any hints ?
See code below.
import java.io.*;
import java.util.*;
import java.text.*;
public class DateGet{
public static void main(String[] args) throws IOException, ParseException{
System.out.print(LabMetoder.numberOfDays(days));
//This call is wrong, what should I write ?
}// end main
public static int numberOfDays (int days) {
String aLine, returnDate;
Date today = new Date(); // gets todays date
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
Book checkDate;
Scanner fin = new Scanner (new FileReader("book.txt")); //open infile
while (fin.hasNext()) {
aLine=fin.nextLine();//reads first line
checkDate = new Book (aLine);//creates object
if (checkDate.getReturnDate()!=null) { // checks that returnDate-field
// isn't empty
String oldDay = (checkDate.getReturnDate());
Date oldDayD = dateFormat.parse(oldDay); //changes oldDay to a
//Dateobject
days = (int)( (today.getTime() - oldDayD.getTime())/
(1000*60*60*24));
//Calculates the difference between todays date and returnDate System.out.println(days);//writes dateobject on screen (this is
// a check)
} //end if
}// end while
fin.close(); //closes book.txt
return days;
}//end NumberOfDays