How do I keep a scanner from throwing exceptions when the wrong type is entered? (java)
- by David
Here's some sample code:
import java.util.Scanner;
class In
{
public static void main (String[]arg)
{
Scanner in = new Scanner (System.in) ;
System.out.println ("how many are invading?") ;
int a = in.nextInt() ;
System.out.println (a) ;
}
}
if i run the program and give it an int like 4then everything goes fine.
if, on the other hand, i answer too many it doesn't laugh at my funny joke. instead i get this: (as expected)
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:819)
at java.util.Scanner.next(Scanner.java:1431)
at java.util.Scanner.nextInt(Scanner.java:2040)
at java.util.Scanner.nextInt(Scanner.java:2000)
at In.main(In.java:9)
is there a way so that i can make it so that it either ignores entries that aren't ints or re prompts with "how many are invading?"? i'd like to know how to do both of these.
