Databases
StackOverflow2013
Postsdbo
POI'm getting an error in my loop. Exception in thread "main" java.util.NoSuchElementException. The error is my scanner?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POI'm getting an error in my loop. Exception in thread "main" java.util.NoSuchElementException. The error is my scanner?
    primarykey
    data
    text
    <p>Ok, it looks like I've ran into a few problems with my main class. It breaks my loop on the 2nd run and displays and error. It says my scanner to read the user selection from the menu is creating the error? How is that, it worked the first loop, but for some reason it can't run again. </p> <pre><code>"action = new Scanner(System.in).nextInt();" </code></pre> <p>is generating the error. Does anyone know why this is happening, as it is very important to read the integer the user puts in as the user is selecting a menu option.</p> <pre><code>import java.util.Scanner; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.lang.String; import java.lang.System; public class MainActions { public static void main(String args[]) throws IOException { int action = 0; while (action != 6) { Contact.menu(); new Scanner(System.in); action = new Scanner(System.in).nextInt(); if (action &lt;= 0 || action &gt; 6) { System.out.println("Invalid selection. "); } switch (action) { case 1: MainActions.addContactInfo(); break; case 2: break; case 3: break; case 4: break; case 5: break; } } } public static void addContactInfo() { Contact contact; contact = new Contact(); Scanner reader = new Scanner(System.in); System.out.println("Enter Contact Last Name:"); String lastname = reader.nextLine(); contact.setLastName(lastname); System.out.println("Enter Contact First Name: "); contact.setFirstName(reader.nextLine()); System.out.println("Enter Contact Street Address: "); contact.setHouseAddress(reader.nextLine()); System.out.println("Enter Contact City: "); contact.setCity(reader.nextLine()); System.out.println("Enter Contact Zip Code: "); contact.setZip(reader.nextLine()); System.out.println("Enter Contact Email: "); contact.setEmail(reader.nextLine()); System.out.println("Enter Contact Phone Number: "); contact.setPhone(reader.nextLine()); System.out.println("Enter Contact Notes: "); contact.setNotes(reader.nextLine()); if (lastname.trim().equals("")) { System.out.println("\nLast name was blank, contact not saved."); System.exit(0); } else { ContactList list; list = new ContactList(); list.add(contact); list.save(); Contact c = contact; try (PrintWriter output = new PrintWriter(new FileWriter("contactlist.csv", true))) { output.printf("%s\r\n", c); } catch (Exception e) {} } reader.close(); } } </code></pre> <p>Console:</p> <pre><code>1. Enter a new person 2. Print the contact list 3. Retrieve a person's information by last name 4. Retrieve a person's information by email address 5. Retrieve all people who live in a given zip code 6. Exit 1 Enter Contact Last Name: asdf Enter Contact First Name: asdf Enter Contact Street Address: asdf Enter Contact City: asdf Enter Contact Zip Code: asdf Enter Contact Email: asdf Enter Contact Phone Number: asdf Enter Contact Notes: asdf Contact information has been saved. Exception in thread "main" java.util.NoSuchElementException at java.util.Scanner.throwFor(Unknown Source) at java.util.Scanner.next(Unknown Source) at java.util.Scanner.nextInt(Unknown Source) at java.util.Scanner.nextInt(Unknown Source) at MainActions.main(MainActions.java:33) 1. Enter a new person 2. Print the contact list 3. Retrieve a person's information by last name 4. Retrieve a person's information by email address 5. Retrieve all people who live in a given zip code 6. Exit </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USrebeliagamer
    1. USuser2188354
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POI'm getting an error in my loop. Exception in thread "main" java.util.NoSuchElementException. The error is my scanner?
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COcheck out my answer. It'll solve your issue.
      singulars
      1. POI'm getting an error in my loop. Exception in thread "main" java.util.NoSuchElementException. The error is my scanner?
      1. USSudoRahul
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload