Question

I have this class:

import java.text.DateFormat;
import java.text.SimpleDateFormat;

public class Test  {
    public static void main(String[] argv) {
        DateFormat df = new SimpleDateFormat("dd/MM/yyyy");


        String h = df.format(1);
        System.out.println(h);//output:
    }
}

It compiles without problems with openjdk 7.

AFAIK there’s no DateFormat#format(int).

Is there any implicit cast that converts 1 to Date?

Answer 1

It’s inherited from Format#format(Object) and the int is being autoboxed to Integer. The value is by the way interpreted as epoch time.