Why is this While-Loop stuck in this infinite loop?

Question

Does anyone know why this code is stuck in an infinite loop? Once ran without the input of an integer it repeats infinitely "Please enter an integer"

class ExceptionHandling {
    public static void main(String[] args) {
        int foo= getInteger();
    }

    public static int getInteger() {
        Scanner in = new Scanner(System.in);

        while(true)
        {
            int delta = 0;
            try
            {
                delta = in.nextInt();
                return delta;
            }
            catch (Exception ex)
            {
                System.out.println("Please enter an integer");
            } 
        }
    }
}