Я делаю домашнее задание, которое касается классов и предметов.В нем есть класс Address, класс Letter и класс PostOffice, который при вызове PostOffice берет входной файл и просматривает его, печатая практически все во входном файле так, как он должен отображаться на букве (to: bla, from: бла, стоимость доставки, адрес и т. д.)
Я получаю сообщение об ошибке:
Exception in thread "main" java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Scanner.java:1516)
at PostOffice.readLetters(PostOffice.java:33)
at PostOffice.main(PostOffice.java:14)
, и я не совсем понимаю, почему ....
вот мой класс почтового отделения:
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
public class PostOffice {
private final int MAX = 1000;
private Letter [] letterArray = new Letter[MAX];
private int count;
public static void main(String [] args) {
PostOffice postOffice = new PostOffice();
postOffice.readLetters("letters.in");
postOffice.sortLetters();
postOffice.printLetters();
}
public PostOffice() {
Letter [] myLetters = letterArray;
this.count = 0;
}
public void readLetters(String filename) {
String toName, toStreet, toCity, toState, toZip;
String fromName, fromStreet, fromCity, fromState, fromZip, temp; //, weight;
double weight;
int index;
Scanner s = new Scanner(filename);
if (s != null) {
while(s.hasNext()){
toName = s.nextLine();
toStreet = s.nextLine();
temp = s.nextLine();
index = temp.indexOf(",");
toCity = temp.substring (0, index);
index = index + 2;
toState = temp.substring (index, index + 2);
toZip = temp.substring (index);
fromName = s.nextLine();
fromStreet = s.nextLine();
temp = s.nextLine();
index = temp.indexOf(",");
fromCity = temp.substring (0, index);
index = index + 2;
fromState = temp.substring (index, index + 2);
fromZip = temp.substring (index);
String var = s.nextLine();
weight = Double.parseDouble(var);
//weight = s.nextLine();
Letter l = new Letter(toName, toStreet, toCity, toState, toZip, fromName, fromStreet, fromCity, fromState, fromZip, weight);
this.count += 1;
this.letterArray[count - 1] = l;
}
}
s.close();
}
public static void sortLetters() {
//call sortSearchUtil This method should call the compareTo method provided by the Letter class to sort.
//You may use any sorting routine you wish (see SortSearchUtil.java)
}
public static void printLetters() {
//call tostring of letter class. print the count of Letters followed by the total postage followed
//by each Letter (make sure you use the toString method provided by the Address and Letter classes for this)
}
}
мой класс письма:
public class Letter extends PostOffice implements Comparable<Letter> {
private static final double POSTAGE_RATE = 0.46;
private String fromName;
private Address fromAddr;
private String toName;
private Address toAddr;
private double weight;
public Letter (String fromName, String fromStreet, String fromCity, String fromState, String fromZip, String toName,
String toStreet, String toCity, String toState, String toZip, double weight) {
this.fromName = fromName;
this.fromAddr = new Address(fromStreet, fromCity, fromState, fromZip);
this.toName = toName;
this.toAddr = new Address(toStreet, toCity, toState, toZip);
this.weight = weight;
}
public String toString() {
String result;
result = String.format("from: %s\t\t\t%5.2f\n%s", fromName, getPostage(weight), fromAddr);
result = result + String.format("\t\t To: %s\n\t\t%s", toName, toAddr);
return result;
}
public int compareTo(Letter that) {
int value;
value = this.toAddr.getZip().compareTo(that.toAddr.getZip());
return value;
}
public static double getPostage(double weight) {
double workWeight;
workWeight = weight + 0.999;
workWeight = (int)workWeight;
return workWeight * POSTAGE_RATE;
}
}
и мой адресный класс:
import java.awt.*;
import java.util.*;
public class Address {
private String street;
private String city;
private String state;
private String zip;
public Address (String street, String city, String state, String zip) {
this.street = street;
this.city = city;
this.state = state;
this.zip = zip;
}
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getZip() {
return zip;
}
public void setZip(String zip) {
this.zip = zip;
}
public String toString() {
String result;
result = String.format("%s\n%s, %s %s", street, city, state, zip);
return result;
}
}
и это содержимое текстового файла
Stu Steiner (NEW LINE)
123 Slacker Lane (NEW LINE)
Slackerville, IL 09035 (NEW LINE)
Tom Capaul(NEW LINE)
999 Computer Nerd Court (NEW LINE)
Dweebsville, NC 28804-1359 (NEW LINE)
0.50 (NEW LINE)
Tom Capaul (NEW LINE)
999 Computer Nerd Court (NEW LINE)
Dweebsville, NC 28804-1359 (NEW LINE)
Chris Peters (NEW LINE)
123 Some St. (NEW LINE)
Anytown, CA 92111-0389 (NEW LINE)
1.55 (NEW LINE)
Все компилируется, мне просто нужно вывести его так:
----------------------------------------------------------------------------
From: From value Postage value
From Address value (be sure and use Address toString)
To: To value
To Address value (be sure and use Address toString)
----------------------------------------------------------------------------