Laufzeitfehler - Ausnahme im Thread "Haupt" java.util.InputMismatchException

Question

Ich habe Probleme mit dem Verständnis, was mit diesem Code falsch ist. Auf Dr.Java funktioniert alles gut, aber auf einer anderen Code-Plattform namens edhesive (wo ich dieses Projekt zugewiesen wurde) gibt es mir einen Fehler. Ich habe alles überprüft, was ich für falsch halte, weiß aber immer noch nicht, was falsch ist.

import java.util.Scanner; 

public class Main 
{ 
    public static void main(String[] args) 
    { 
      Scanner scan = new Scanner(System.in); 
      System.out.println("Welcome. What is your name?"); 
      String name = scan.next(); 

      System.out.println("Hello " + name + ". Try your best to crack the code!"); 

      System.out.println("PHASE 1"); 
      System.out.println("Enter a number:"); 
      int phaseOneNum = scan.nextInt(); 

      if (phaseOneNum == 3) 
      { 
       System.out.println("Correct!"); 

       System.out.println("PHASE 2"); 
       System.out.println("Enter a number:"); 
       int phaseTwoNum = scan.nextInt(); 

       if (phaseTwoNum == 1 || (phaseTwoNum > 33 && phaseTwoNum<= 100)) 
       { 
        System.out.println("Correct!"); 

        System.out.println("PHASE 3"); 
        System.out.println("Enter a number:"); 
        int phaseThreeNum = scan.nextInt(); 

        if (phaseThreeNum > 0 && ((phaseThreeNum % 3 == 0) || (phaseThreeNum % 7 == 0))) 
        { 
         System.out.println("Correct!"); 
         System.out.println("You have cracked the code!"); 
        } 

        else 
        { 
         System.out.println("Sorry, that was incorrect!"); 
         System.out.println("Better luck next time!"); 
        } 
       } 

       else 
       { 
        System.out.println("Sorry, that was incorrect!"); 
        System.out.println("Better luck next time!"); 
       } 
      } 

      else 
      { 
       System.out.println("Sorry, that was incorrect!"); 
       System.out.println("Better luck next time!"); 
      } 
    } 
} 

Nachdem es auf edhesive läuft, bekomme ich diesen Fehler

Exception in thread "main" java.util.InputMismatchException 
    at java.util.Scanner.throwFor(Scanner.java:864) 
    at java.util.Scanner.next(Scanner.java:1485) 
    at java.util.Scanner.nextInt(Scanner.java:2117) 
    at java.util.Scanner.nextInt(Scanner.java:2076) 
    at Main.main(Main.java:184) 
    at Ideone.test(Main.java:111) 
    at Ideone.test(Main.java:31) 
    at Ideone.main(Main.java:23) 

jemand mir bitte helfen?

Answer 1

Laufzeitfehler - Exception in thread „main“ java.util.InputMismatchException

scan.nextInt(); integer akzeptieren nur, können Sie vorbei String. So gibt es java.util.InputMismatchException

import java.util.Scanner; 

public class Main { 

    public static void main(String[] args) { 
     Scanner scan = new Scanner(System.in); 
     System.out.println("Welcome. What is your name?"); 
     String name = scan.next(); 

     System.out.println("Hello " + name + ". Try your best to crack the code!"); 

     System.out.println("PHASE 1"); 
     System.out.println("Enter a number:"); 
     int phaseOneNum = 0; 
     do { 
      while (!scan.hasNextInt()) { 
       System.out.println("That's not a number!"); 
       scan.next(); // this is important! 
      } 
      phaseOneNum = scan.nextInt(); 
     } while (phaseOneNum <= 0); 

     if (phaseOneNum == 3) { 
      System.out.println("Correct!"); 

      System.out.println("PHASE 2"); 
      System.out.println("Enter a number:"); 
      int phaseTwoNum; 
      do { 
       while (!scan.hasNextInt()) { 
        System.out.println("That's not a number!"); 
        scan.next(); // this is important! 
       } 
       phaseTwoNum = scan.nextInt(); 
      } while (phaseTwoNum <= 0); 

      if (phaseTwoNum == 1 || (phaseTwoNum > 33 && phaseTwoNum <= 100)) { 
       System.out.println("Correct!"); 

       System.out.println("PHASE 3"); 
       System.out.println("Enter a number:"); 
       int phaseThreeNum; 
     do { 
      while (!scan.hasNextInt()) { 
       System.out.println("That's not a number!"); 
       scan.next(); // this is important! 
      } 
      phaseThreeNum= scan.nextInt(); 
     } while (phaseThreeNum<= 0); 

       if (phaseThreeNum > 0 && ((phaseThreeNum % 3 == 0) || (phaseThreeNum % 7 == 0))) { 
        System.out.println("Correct!"); 
        System.out.println("You have cracked the code!"); 
       } else { 
        System.out.println("Sorry, that was incorrect!"); 
        System.out.println("Better luck next time!"); 
       } 
      } else { 
       System.out.println("Sorry, that was incorrect!"); 
       System.out.println("Better luck next time!"); 
      } 
     } else { 
      System.out.println("Sorry, that was incorrect!"); 
      System.out.println("Better luck next time!"); 
     } 
    } 
}