Making exceptions

I don't know why this exception is not working...

import java.util.*;

public class a {
    public static void main(String[] args) {
        Scanner a = new Scanner(System.in);
        int x; 
        x=a.nextInt();
        if( x < 5) {
            System.out.print("This is if statement");
        }else if(x<3){
            System.out.print("This is else if statement");
        }else{
           System.out.print("This is else statement");
        }
        a.close();
    }
}