My code below wont allow me to enter the ID number and I cannot figure out why. The error that shows is below the code, thank you for your help.

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.util.Scanner;

class Main {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

String data = "";

String id = "";

while (true) {

System.out.println("Enter 'List' to Show Items | Enter 'Add' to Add Professor | Enter 'Exit' to Exit ");

String choice;

choice = sc.nextLine();

if (choice.equals("List")) {

try {

File object = new File("file.txt");

Scanner scan = new Scanner(object);

while (scan.hasNextLine()) {

data = scan.nextLine();

id = scan.nextLine();

System.out.println(data);

System.out.println(id);

}

scan.close();

} catch (FileNotFoundException e) {

System.out.println("No Files Found.");

System.out.println("Must Add Information Before Viewing List");

}

} else if (choice.equals("Add")) {

System.out.println("Enter name to add:");

String name = sc.next();

data += (name);

System.out.println("Enter ID:");

String number = sc.next();

id = (number); //New 'if' statement if needed

try {

FileWriter writer = new FileWriter("file.txt");

writer.write(data);

writer.close();

writer.write(id);

System.out.println("Successfully wrote to the file. ");

System.out.print(data + " has been added to the file with ID Number ");

} catch (IOException e) {

System.out.println("An error occurred.");

e.printStackTrace();

}

}

else break;

}

sc.close();

}

}

Enter 'List' to Show Items | Enter 'Add' to Add Professor | Enter 'Exit' to Exit

Add

Enter name to add:

James

Enter ID:

4444

An error occurred.

java.io.IOException: Stream closed

at java.base/sun.nio.cs.StreamEncoder.ensureOpen(StreamEncoder.java:51)

at java.base/sun.nio.cs.StreamEncoder.write(StreamEncoder.java:124)

at java.base/sun.nio.cs.StreamEncoder.write(StreamEncoder.java:141)

at java.base/java.io.OutputStreamWriter.write(OutputStreamWriter.java:223)

at java.base/java.io.Writer.write(Writer.java:249)

at Main.main(Main.java:44)

Enter 'List' to Show Items | Enter 'Add' to Add Professor | Enter 'Exit' to Exit