Someone please help...why the exception occurs
package com.codegym.task.task20.task2002;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/*
Reading and writing to a file: CodeGym
*/
public class Solution {
public static void main(String[] args) {
// You can find your_file_name.tmp in your TMP directory or adjust outputStream/inputStream according to your file's actual location
try {
File yourFile = File.createTempFile("your_file_name", null);
OutputStream outputStream = new FileOutputStream(yourFile);
InputStream inputStream = new FileInputStream(yourFile);
CodeGym codeGym = new CodeGym();
// Initialize users field for the codeGym object here
User user = new User();
user.setFirstName("Josephine");
user.setLastName("Joseph");
user.setCountry(User.Country.UNITED_STATES);
user.setBirthDate(new Date());
user.setMale(false);
User user2 = new User();
user2.setFirstName("JoseLINE");
user2.setLastName("Joseph");
user2.setCountry(User.Country.UNITED_STATES);
user2.setBirthDate(new Date());
user2.setMale(false);
codeGym.users.add(user);
codeGym.users.add(user2);
codeGym.save(outputStream);
outputStream.flush();
CodeGym loadedObject = new CodeGym();
loadedObject.load(inputStream);
// Here check that the codeGym object is equal to the loadedObject object
outputStream.close();
inputStream.close();
} catch (IOException e) {
//e.printStackTrace();
System.out.println("Oops, something is wrong with my file");
} catch (Exception e) {
//e.printStackTrace();
System.out.println("Oops, something is wrong with the save/load method");
}
}
public static class CodeGym {
public List<User> users = new ArrayList<>();
public void save(OutputStream outputStream) throws Exception
{
PrintWriter writer = new PrintWriter(outputStream);
if (!users.isEmpty()) {
for (User u : users) {
writer.println(u.getFirstName());
writer.println(u.getLastName());
writer.println(u.getBirthDate().getTime());
writer.println(u.isMale());
writer.println(u.getCountry());
}
}
writer.flush();
}
public void load(InputStream inputStream) throws Exception
{
BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
String str;
String[] temp;
while ((str = br.readLine()) != null) {
temp = str.split(",");
User user = new User();
user.setFirstName(temp[0]);
user.setLastName(temp[1]);
user.setBirthDate(new Date(temp[2]));
switch (temp[3]) {
case "true":
user.setMale(true);
break;
case "false":
user.setMale(false);
break;
}
switch (temp[4]) {
case "United States":
user.setCountry(User.Country.UNITED_STATES);
break;
case "United Kingdom":
user.setCountry(User.Country.UNITED_KINGDOM);
break;
case "Other":
user.setCountry(User.Country.OTHER);
break;
}
users.add(user);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
CodeGym codeGym = (CodeGym) o;
return users != null ? users.equals(codeGym.users) : codeGym.users == null;
}
@Override
public int hashCode() {
return users != null ? users.hashCode() : 0;
}
}
}