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| 使用有效的整数 |
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import java.util.InputMismatchException;
import java.util.Scanner;
public class MainClass {
static Scanner sc = new Scanner(System.in);
public static void main(String[] args) {
System.out.print("Enter an integer: ");
int i = GetInteger();
System.out.println("You entered " + i);
}
public static int GetInteger() {
while (true) {
try {
return sc.nextInt();
} catch (InputMismatchException e) {
sc.next();
System.out.print("That's not " + "an integer. Try again: ");
}
}
}
}
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