java.util.NoSuchElementException: No line found, do I need to handle this exception? -

my program compiles, getting run time exceptions, not sure if need handle them? methods commented out , extended class, display text. don't know if using labels correctly? want program loop , handle exceptions erroneous characters, does, should terminate if user enters "5".

import java.util.*; import java.util.inputmismatchexception; import java.util.scanner;   public class mainmenu3 {  // extends premierleagueclubs    public static void main(string args[]){      boolean shouldexit = false;      int option = 0; loop:   while (!shouldexit) { try{     scanner in = new scanner(system.in);           menu();     system.out.println("\n");     option = in.nextint(); } // end try  catch(inputmismatchexception e) { string option2 = integer.tostring(option);      } // end catch      switch (option) {      case 1:     chooseteam();     break;      case 2:      createprofile();     break;      case 3:     loadsave();     break;      case 4:     credits();       break;      case 5:     break loop;      default:     system.out.println("invalid choice"); }      } // end switch        } // end main method  public static void chooseteam(){ system.out.println("\n\n\n\n\n\n\n\n\n\n\n\n\n\n"); system.out.println("select team : "); system.out.println("1. arsenal"); system.out.println("2. aston villa"); system.out.println("3. bournemouth"); system.out.println("4. chelsea"); system.out.println("5. crystal palace"); system.out.println("6. everton"); system.out.println("7. leicester city"); system.out.println("8. liverpool"); system.out.println("9. manchester united"); system.out.println("10. manchester city"); system.out.println("11. newcastle united"); system.out.println("12. norwich city"); system.out.println("13. southampton"); system.out.println("14. stoke city"); system.out.println("15. sunderland"); system.out.println("16. swansea city"); system.out.println("17. tottenham hotspur"); system.out.println("18. watford"); system.out.println("19. west brom"); system.out.println("20. west ham united");  int option = 0;      scanner in = new scanner(system.in);     //menu();      system.out.println("\n");     option = in.nextint();     system.out.println("you entered : " + option);  } // end chooseteam    public static void createprofile(){ } // end createprofile public static void loadsave(){ } // end loadsave public static void credits(){ } // end credits   public static void menu(){    system.out.println("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");     system.out.println("created darren estcourt");        system.out.println("\n");     system.out.println("please choose option : ");     system.out.println("\n");     system.out.println("1. choose team");     system.out.println("\n");     system.out.println("2. create profile");     system.out.println("\n");     system.out.println("3. load/save game");     system.out.println("\n");     system.out.println("4. credits");        system.out.println("\n");     system.out.println("5. quit");      system.out.println("\n");      string option="0";      scanner in = new scanner(system.in);      system.out.println("\n");     option = in.nextline();      switch (option) {      case "1":     chooseteam();     break;      case "2":        createprofile();     break;      case "3":     loadsave();     break;      case "4":     credits();       break;      case "5":     system.out.println("goodbye!");       default:     system.out.println("please select option between 1 , 4"); //menu();     } // end switch    } // end menu     } // end class 

there multiple issues program:

1. you define shouldexit update according user input
2. you scan , process user input both in main() , in menu(). generally, code isn't structured in coherent readable manner , there little reuse.
3. println() prints new line (as opposed print())
4. for love of programming goddess - do not use system.exit() terminate java program

here example of working class above guidelines implemented pasable degree :

import java.util.*;  public class mainmenu3 {     static scanner in;      public static void main(string args[])     {         in = new scanner(system.in);         boolean shouldexit = false;         while (!shouldexit) {             displaymenu();             shouldexit = processuserinput();         }     }      public static void displaymenu()     {         system.out.println();         system.out.println("created darren estcourt");         system.out.println("please choose option : ");         system.out.println("1. choose team");         system.out.println("2. create profile");         system.out.println("3. load/save game");         system.out.println("4. credits");         system.out.println("5. quit");     }      public static int getuserinput()     {         int option = -1;         try {             option = in.nextint();         } catch (inputmismatchexception e) {             // when scanner throws inputmismatchexception,              // scanner not pass token caused exception,             // may retrieved or skipped via other method.             in.next();         } catch (nosuchelementexception e) {             // input exhausted             option = 5;         } catch (illegalstateexception e) {}             // scanner closed             option = 5;         }         return option;     }      public static boolean processuserinput()     {         int option = getuserinput();         switch (option) {         case 1:             chooseteam();             break;         case 2:             createprofile();             break;         case 3:             loadsave();             break;         case 4:             credits();             break;         case 5:             system.out.println("goodbye!");             return true;         default:             system.out.println("invalid choice");         }         return false;     }      public static void chooseteam()     {         system.out.println();         system.out.println("select team : ");         system.out.println("1. arsenal");         system.out.println("2. aston villa");         system.out.println("3. bournemouth");         system.out.println("4. chelsea");         system.out.println("5. crystal palace");         system.out.println("6. everton");         system.out.println("7. leicester city");         system.out.println("8. liverpool");         system.out.println("9. manchester united");         system.out.println("10. manchester city");         system.out.println("11. newcastle united");         system.out.println("12. norwich city");         system.out.println("13. southampton");         system.out.println("14. stoke city");         system.out.println("15. sunderland");         system.out.println("16. swansea city");         system.out.println("17. tottenham hotspur");         system.out.println("18. watford");         system.out.println("19. west brom");         system.out.println("20. west ham united");          int option = getuserinput();          system.out.println("you entered : " + option);     } // end chooseteam      public static void createprofile()     {         system.out.println("createprofile");     }      public static void loadsave()     {         system.out.println("loadsave");     }      public static void credits()     {         system.out.println("credits");     } }