我有一个项目用于我的Java类，用户为医院输入患者，然后程序读取文件，用户可以选择将添加的患者修改为文件，将其打印到屏幕或两者。该程序对我来说在NetBeans中完美运行，但在教授的评论中，他说他的编译器得到了一个FileNotFoundException（编辑：它实际上是一个运行时错误），即使我在包中包含了该文件。当我通过电子邮件发送给他时，他只重复说他收到了FileNotFoundException。 这是代码：
package realworldproblem3;
import java.util.*;
import java.io.*;
public class xyzHospital {
static int numOfPat;
static Scanner input = new Scanner(System.in);
static String inp;
static ArrayList<Patient> p = new ArrayList<>();
public static void main(String[] args) throws IOException {
boolean done = false;
importPatients();
System.out.print("Add new patients to the report:\n");
while (done == false){
addPatient();
System.out.print("Are you done adding patients? (Y or N)\n");
inp = input.nextLine();
switch (inp.toLowerCase()){
case "y": done = true;
break;
case "n": done = false;
break;
default: System.out.print("You did not enter a valid character. The program will print results then exit.\n\n");
done = true;
break;
}
}
printAll();
}
static public void addPatient(){
numOfPat++;
Patient pat = new Patient();
p.add(pat);
pat.addInfo(numOfPat);
}
static public void printAll() throws IOException{
System.out.print("Do you want to output the report to the screen ('S'), to a file ('F'), or both('B')?\n");
inp = input.next();
PrintWriter writer = new PrintWriter("XYZHospitalExampleData-1.txt");
switch (inp.toLowerCase()){
case "s":
System.out.print("\t\t\t\t\tXYZ Community Hospital\t\t\n=============================================================================================================\n");
System.out.printf("%-14s%30s%38s%n", " Name", "Address", "Payment Information");
System.out.printf("%-8s%-8s%15s%10s%10s%8s%15s%15s%15s %n", "Last", "First", "Address Line 1", "City", "State", "Zip", "Payment Date", "Payment Amt.","Amount Owed");
System.out.print("=============================================================================================================\n");
for(int i = 0; i<numOfPat;i++){
p.get(i).print();
}
break;
case "f":
writer.print(""); //writes over file so there is no duplicate patients
writer.close();
for(int i = 0; i<numOfPat;i++){
p.get(i).printToFile();
}
break;
case "b":
System.out.print("\t\t\t\t\tXYZ Community Hospital\t\t\n=============================================================================================================\n");
System.out.printf("%-14s%30s%38s%n", " Name", "Address", "Payment Information");
System.out.printf("%-8s%-8s%15s%10s%10s%8s%15s%15s%15s %n", "Last", "First", "Address Line 1", "City", "State", "Zip", "Payment Date", "Payment Amt.","Amount Owed");
System.out.print("=============================================================================================================\n");
writer.print("");
writer.close();
for(int i = 0; i<numOfPat;i++){
p.get(i).printToFile();
p.get(i).print();
}
break;
}
}
//each patient from the file is added as a patient object
static public void importPatients() throws IOException{
try(Scanner read = new Scanner(new BufferedReader(new FileReader("XYZHospitalExampleData-1.txt")))) {
while(read.hasNextLine()){ //one more line means that there is another patient to add
numOfPat++;
read.nextLine();
}
read.close();
try(Scanner r = new Scanner(new BufferedReader(new FileReader("XYZHospitalExampleData-1.txt")))) {
for (int j=0; j < numOfPat; j++){
String line = r.nextLine();
Patient pat = new Patient();
p.add(pat);
String[] str = line.split("\\^"); //the delimiter ^ is used to separate information in the file
for (int i = 0; i < str.length; i++){
if(str[i].isEmpty()||str[i].matches("0")||str[i] == null){ //if str[i] is empty, that means that it will be skipped over
i++;
}
switch (i){
case 0: p.get(j).ID = Integer.parseInt(str[i]);
break;
case 1: p.get(j).nameLast = str[i];
break;
case 2: p.get(j).nameFirst = str[i];
break;
case 3: p.get(j).address = str[i];
break;
case 4: p.get(j).opAddr = str[i];
break;
case 5: p.get(j).city = str[i];
break;
case 6: p.get(j).state = str[i];
break;
case 7: p.get(j).zip = Integer.parseInt(str[i]);
break;
case 8: p.get(j).optZip = Integer.parseInt(str[i]);
break;
case 9: p.get(j).payDate = str[i];
break;
case 10: p.get(j).payment = Double.parseDouble(str[i]);
break;
case 11: p.get(j).owed = Double.parseDouble(str[i]);
break;
default: System.out.print("Error.\n");
break;
}
}
}
r.close();
}
}
}
}
以下是患者类：
package realworldproblem3;
import java.util.*;
import java.io.*;
public class Patient {
Scanner input = new Scanner(System.in);
String nameFirst, nameLast, address, opAddr,city, state, payDate;
int zip, optZip, ID;
double owed, payment;
public void print() {
System.out.printf("%-8s%-9s%-20s%-10s%-8s%-7s%-15s%-11.2f%-10.2f%n", nameLast, nameFirst, address, city, state, zip, payDate, owed, payment);
}
public void printToFile()throws IOException{
try (PrintWriter writer = new PrintWriter(new FileWriter("XYZHospitalExampleData-1.txt", true))) {
writer.write(ID + "^" + nameLast+ "^" + nameFirst + "^" + address + "^" + opAddr + "^" + city + "^" + state + "^" + zip + "^" + optZip + "^"+ payDate + "^" + payment + "^" + owed +"\n");
writer.close();
}
}
private void setName(){
System.out.print("Enter patient's first name.\n"); //user is asked for all information
nameFirst = input.nextLine(); //first three inputs use nextLine so it consumes the end of line character, so the address will be put in the string correctly.
System.out.print("Enter patient's last name.\n"); //if next() is used, the address is cut off at the first whitespace and the other elements of the address
nameLast = input.nextLine(); //are stored in the upcoming inputs.
if (nameFirst.isEmpty()||nameLast.isEmpty()){
System.out.print("You must enter the first and last name.\n");
setName();
}
}
public String getName(){
return nameFirst + " " + nameLast;
}
private void setAddr(){
System.out.print("Enter patient's address.\n");
address = input.nextLine();
if (address.isEmpty()){
System.out.print("You must enter the patients address.\n");
setAddr();
}
}
public String getAddr(){
return address;
}
private void setCity(){
System.out.print("Enter patient's home city.\n");
city = input.nextLine();
if(city.isEmpty()){
System.out.print("You must enter the patients city.\n");
setCity();
}
}
public String getCity(){
return city;
}
private void setState(){
System.out.print("Enter patient's state.\n");
state = input.nextLine();
if(state.isEmpty()){
System.out.print("You must enter the patients state.\n");
setState();
}
}
public String getState(){
return state;
}
private void setDate(){
System.out.print("Enter the payment date.\n");
payDate = input.next();
if(payDate.isEmpty()){
System.out.print("You must enter a payment date.\n");
setDate();
}
}
public String getDate(){
return payDate;
}
private void setZip(){
System.out.print("Enter patient's zipcode.\n");
try{
zip = input.nextInt();
}
catch(Exception e){
System.out.print("You must enter a valid 5-digit zipcode.\n");
input.next();
setZip(); //if it says that the setZip call will make the function loop infinitely, it is just a warning, it will not loop infinitely.
}
int length = String.valueOf(zip).length();
if(length != 5 && zip > 0){
System.out.print("You must enter a valid 5-digit zipcode.\n");
setZip();
}
}
public int getZip(){
return zip;
}
private void setOwed(){
System.out.print("Enter patient's due balance.\n");
try{
owed = input.nextDouble();
}
catch(Exception e){
System.out.print("Amount has to be a non-negative number.\n");
input.next();
setOwed();
}
int length = String.valueOf(owed).length();
if (owed <0 || length == 0){
System.out.print("Amount has to be a non-negative number.\n");
setOwed();
}
}
public double getOwed(){
return owed;
}
private void setPayment(){
System.out.print("Enter patient's payment amount.\n");
try{
payment = input.nextDouble();
}
catch(Exception e){
System.out.print("Payment amount has to be a positive number less than the amount owed.\n");
input.next();
setPayment();
}
int length = String.valueOf(payment).length();
if(payment < 0 || length ==0 || payment > owed){
System.out.print("Payment amount has to be a positive number less than the amount owed.\n");
setPayment();
}
}
public double getPayment(){
return payment;
}
private void setID(int Id){
ID = Id;
}
public int getID(){
return ID;
}
public void addInfo(int ID){
setID(ID);
setName();
setAddr();
setCity();
setState();
setZip();
setOwed();
setPayment();
setDate();
}
}
这是文件XYZHospitalExampleData-1.txt：
12345 ^ Jones ^ John ^ 1234试驾^邮箱123 ^测试城市^ IN ^ 11234 ^ 1234 ^ 12/05 / 2015 ^ 250.0 ^ 25000.0 12346 ^ Jones ^ Sara ^ 1234试驾^邮箱123 ^测试城市^ IN ^ 11234 ^ 1234 ^ 12/20/2010 ^ 50.0 ^ 50000.0 12347 ^ Doe ^ John ^ 1235 XYZ Drive ^ null ^测试城市^ IN ^ 11234 ^ 0 ^ 01/05/2016 ^ 350.0 ^ 56799.0 12348 ^ Doe ^ Sara ^ 1235 XYZ Drive ^ null ^测试城市^ IN ^ 11234 ^ 0 ^ 11/09/2017 ^ 100.0 ^ 5020.52 12349 ^ Lawson ^ Lonnie ^ 12 South Drive ^ null ^测试城市^ IN ^ 11236 ^ 0 ^ 03/15 / 2013 ^ 253.51 ^ 25065.52 12349 ^ Anderson ^ Sara ^ 156 North Avenue ^ null ^测试城市^ IN ^ 11246 ^ 0 ^ 05/05 / 2013 ^ 21.33 ^ 251.56 12350 ^史密斯^安迪^ 2455东街^ null ^测试城市^ IN ^ 11246 ^ 0 ^ 12/05/2017 2017 365.21 ^ 2543.33
它从他们的ID开始，以他们欠的金额结束。任何帮助，以了解为什么我的教授的编译器给他一个错误，将不胜感激，我可以做些什么来确保它能够找到该文件，所以我没有再次遇到这个问题。
答案 0 :(得分：0)
在main方法的开头，您调用importPatients，该文件从XYZHospitalExampleData-1.txt文件中读取数据。如果此文件不存在，您将获得异常（在运行时，而不是编译器错误）。
当你的包被解包时，很可能出现了问题。也许文件没有复制到预期的位置，就像那样。解决此问题的方法之一是捕获FileNotFoundException并显示描述出错和预期内容的消息。