如果有人能看到我的代码哪里出错了，我将永远感激不尽。我承认这是大量的代码，但在过去的几天里，我一直在用它来抓头发，根本无法理解如何处理它。我在课堂上向其他人寻求帮助，但他们看不到我哪里出错了。这与回车扫描仪问题有关。
java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Unknown Source)
at PropertyMenu.runMenu(PropertyMenu.java:109)
at PropertyMenu.main(PropertyMenu.java:7)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272)
任何想法将不胜感激。
乔。
//房间类
import java.util.Scanner;
public class Room{
private String description;
private double length;
private double width;
public Room (String description, double length, double width) {
this.description = description;
this.length = length;
this.width = width;
}
public Room(){
Scanner scan = new Scanner(System.in);
scan.useDelimiter("\n");
System.out.println("Enter description of room:");
description = scan.next();
System.out.println("Enter length of room:");
length = scan.nextDouble();
System.out.println("Enter width of room:");
width = scan.nextDouble();
}
public double getArea () {
return length*width;
}
@Override
public String toString() {
String result = ("***********************************\n");
result +=(" Room Viewing \n");
result +=("************************************\n");
result +=("The width of the room is " + width + "m.\n");
result +=("the length of the room is " + length + "m.\n");
result +=("the name of the room is: " + description +".\n");
return result;
}
}
//家庭类
import java.util.*;
public class House {
private ArrayList<Room> abode;
private int idNum, numRooms;
private double totalArea;
private static int internalCount = 1;
private String address, roomInfo, houseType;
public House (String address, String houseType, int numRooms){
System.out.println("THIS IS THE START OF MY 3 ARGUMENT CONSTRUCTOR");
idNum = internalCount++;
this.address = address;
this.houseType = houseType;
this.numRooms = numRooms;
System.out.println("THIS IS THE END OF MY 3 ARGUMENT CONSTRUCTOR");
}
public House (String address, String houseType, int numRooms, String roomInfo){
System.out.println("THIS IS THE START OF MY 4 ARGUMENT CONSTRUCTOR");
idNum = internalCount++;
this.address = address;
this.houseType = houseType;
this.numRooms = numRooms;
this.roomInfo = roomInfo;
Scanner scan = new Scanner(roomInfo);
String desc;
Double l;
Double w;
while (scan.hasNext()){
desc= scan.next();
l = Double.parseDouble(scan.next());
System.out.println("the length from here"+l);
w = Double.parseDouble(scan.next());
System.out.println("the width from here"+w);
new Room (desc,l,w);
}
System.out.println("THIS IS THE END OF MY 4 ARGUMENT CONSTRUCTOR");
}
public void addRoom (){
totalArea=0;
abode.add(new Room ());
for (int i=0; i<abode.size(); i++){
totalArea += abode.get(i).getArea();
}
}
public House () {
totalArea = 0;
abode = new ArrayList<Room>();
idNum = ++internalCount;
Scanner scan = new Scanner(System.in);
scan.useDelimiter("\n");
System.out.println("Enter address of house:");
address = scan.next();
System.out.println("Enter number of rooms:");
numRooms = scan.nextInt();
System.out.println("Enter type of house:");
houseType = scan.next();
for (int i=1; i<=numRooms; i++){
addRoom();
}
}
int getIdNum() {
return idNum;
}
@Override
public String toString() {
String result =("************************************\n");
result +=(" House Viewing \n");
result +=("************************************\n");
result +=("The house ID is " + idNum +".\n");
result +=("The house address is " + address +".\n");
result +=("The number of rooms here is " + numRooms +".\n");
result +=("The house type is " + houseType +".\n");
result +=("The total area of the house is " + totalArea +".\n");
result +=(abode);
return result;
}
}
//司机
import java.util.*;
import java.io.*;
public class PropertyMenu {
private ArrayList<House> properties =new ArrayList<House>();
public static void main (String[] args) throws IOException{
PropertyMenu menu = new PropertyMenu();
menu.runMenu();
}
public void runMenu() {
House h = null;
char selection = ' ';
Scanner s = new Scanner(System.in);
while (selection != 'e') {
System.out.println();
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println("Welcome to my Property database");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println("What do you want to do?");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println("To ADD a house enter......A");
System.out.println("To VIEW a house enter.....V");
System.out.println("To DELETE a house enter...D");
System.out.println("To USE a file.............F");
System.out.println("To QUIT enter.............E");
selection = s.next().toLowerCase().charAt(0);
switch (selection) {
case 'a':
properties.add(new House());
break;
case 'v':
System.out.println("Do you want to view all houses (y/n)?");
String all = "";
all = s.next();
if (all.equalsIgnoreCase("y")){
for (int i=0; i<properties.size(); i++){
System.out.println("Property ID: "+ (properties.get(i)));
}
}
else if(all.equalsIgnoreCase("n")){
System.out.println(""+ properties.size() +" houses have been created, choose the id of the house you wish to view.. (1/2/3 etc...)");
System.out.println("List of property ID's: ");
for (int i=0; i<properties.size(); i++){
System.out.println("Property ID: "+ (properties.get(i)).getIdNum());
}
System.out.println("Enter ID of the house you wish to view:");
int viewHouse = s.nextInt();
if (viewHouse <= properties.size() && viewHouse >= 1){
System.out.println(properties.get(viewHouse-1));
}
else{
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(" House Not Present ");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
}
}
else{
System.out.println("Do you want to view all houses (y/n)?");
all = s.next();
}
break;
case 'd':
System.out.println(""+ properties.size() +" houses have been created, choose the id of the house you wish to delete.. (1/2/3 etc...)");
System.out.println("List of property ID's: ");
for (int i=0; i<properties.size(); i++){
System.out.println("Property ID: "+ (properties.get(i)).getIdNum());
}
System.out.println("Enter ID of the house you wish to delete:");
int deleteHouse = s.nextInt();
if (deleteHouse <= properties.size() && deleteHouse >= 1){
properties.remove(deleteHouse -1);
}
else{
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(" House Not Present ");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
}
break;
case 'e':
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(" Goodbye ");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
break;
//*********************************THIS IS WHERE MY PROBLEM IS, FROM HERE*************
case 'f':
try{
Scanner fileScan = new Scanner (new File("property.txt"));
while (fileScan.hasNext()){
System.out.println("THIS IS A FRESH LOOP");
String a;
String ht;
String rms1;
int rms;
String yn;
String rmInfo;
a = fileScan.nextLine();
System.out.println("ADDRESS"+a);
ht = fileScan.nextLine();
System.out.println("HOUSE TYPE"+ht);
rms1 = fileScan.next();
rms = Integer.parseInt(rms1);
System.out.println("HOUSEROOMs"+rms);
yn = fileScan.next();
String overflow = fileScan.nextLine();
System.out.println("Yes/no"+yn);
if (yn.equalsIgnoreCase("Y")){
System.out.println("THIS IS THE START OF CHOICE = Y");
rmInfo = fileScan.nextLine();
properties.add(new House(a, ht, rms, rmInfo));
System.out.println("THIS IS THE END OF CHOICE = Y");
}
else{
System.out.println("THIS IS THE START OF CHOICE = N");
properties.add(new House(a, ht, rms));
System.out.println("THIS IS THE END OF CHOICE = N");
}
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
break;
//******************************************TO HERE^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
default:
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(" Try again! ");
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
}
}
System.out.println("Exiting program.");
}
}