Vitangelo Moscarda :
I have this code:
import java.util.Scanner;
public class Maggiore3Valori {
public static void main(String[] args) {
Scanner scanner = new Scanner("System.in");
int num1, num2, num3;
int max;
System.out.println("Inserisci il primo numero: ");
num1 = scanner.nextInt();
System.out.println("Inserisci il secondo numero: ");
num2 = scanner.nextInt();
System.out.println("Inserisci il terzo numero: ");
num3 = scanner.nextInt();
if (num1 > num2 && num1 > num3) {
max = num1;
} else if (num2 > num1 && num2 > num3) {
max = num2;
} else {
max = num3;
}
System.out.println("Il maggiora trai tre è: " + max);
scanner.close();
}
}
When I run it, before I can input the first number the console gives me this error:
Inserisci il primo numero:
Exception in thread "main" java.util.InputMismatchException
at java.base/java.util.Scanner.throwFor(Scanner.java:939)
at java.base/java.util.Scanner.next(Scanner.java:1594)
at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
at Maggiore3Valori.main(Maggiore3Valori.java:13)
I read around that the problem is with the type of variables; but they should be right. What does this error mean? How can I solve it?
Andy Turner :
Scanner scanner = new Scanner ("System.in");
This creates a scanner that reads a file in the current directory named System.in.
That's probably not what you mean. To read from the standard input, remove the quotes:
Scanner scanner = new Scanner (System.in);
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