Scanner NoSuchElementException
exception, java, java.util.scanner
Solution
You have more than one `Scanner` that you close, which closes the underlying `InputStream`, therefore another `Scanner` can no longer read from the same `InputStream` and a `NoSuchElementException` results.
For console apps, use a single `Scanner` to read from `System.in`.
Problem
I'm having a problem with my Java assignment. I'm getting an unexpected exception, specifically: java.util.NoSuchElementException: No line found I am using `Scanner(System.in)` and the program is continually reading nothing and repeating the "invalid format" exception text. If I enter a correctly valued `int`, the first part passes and then the `double` part immediately goes into this exception. If I enter an incorrectly valued `int`, then it starts looping the exception. Here is my code: ``` import java.util.Scanner; public class Program_4 { public static void main(String[] args) { getValidInt("Enter an integer from 5 to 50",5,50); getValidDouble("Enter a double from 5.0 to 50.0",5.0,50.0); getValidString("Enter a string with length from 5 to 8 characters",5,8); } public static int getInt(String prompt) { Scanner sc = new Scanner(System.in); int i = 0; boolean isValid; do { try { System.out.print(prompt + ": "); i = Integer.parseInt(sc.nextLine()); isValid = true; } catch (Exception e) { System.out.println(e); System.out.print("Invalid Format: "); isValid = false; } } while (isValid == false); sc.close(); return i; } public static int getValidInt(String prompt, int min, int max) { int i = 0; boolean isValid = false; do { i = getInt(prompt); if(i < min) System.out.println("Value must be >= " + min); else if(i > max) System.out.println("Value must be <= " + max); else isValid = true; } while (isValid == false); return i; } public static double getDouble(String prompt) { Scanner sc = new Scanner(System.in); double i = 0.0; boolean isValid; do { try { System.out.print(prompt + ": "); i = Double.parseDouble(sc.nextLine()); isValid = true; } catch (Exception e) { System.out.println(e); System.out.println("Invalid Format: "); isValid = false; } } while (isValid == false); sc.close(); return i; } public static double getValidDouble(String prompt, double min, double max) { int i = 0; boolean isValid = false; do { i = getInt(prompt); if(i < min) System.out.println("Value must be >= " + min); else if(i > max) System.out.println("Value must be <= " + max); else isValid = true; } while (isValid == false); return i; } public static String getString(String prompt) { Scanner sc = new Scanner(System.in); String i=""; boolean isValid; do { try { System.out.print(prompt + ": "); i = sc.nextLine(); isValid = true; } catch (Exception e) { System.out.print("Invalid Format: "); isValid = false; } } while (isValid == false); sc.close(); return i; } public static String getValidString(String prompt, int min, int max) { String i; boolean isValid = false; do { i = getString(prompt); if(i.length() < min) System.out.println("String must be more than " + min + " characters."); else if(i.length() > max) System.out.println("String must be more than " + max + " characters."); else isValid = true; } while (isValid == false); return i; } } ```