Guess what could be printed on stdout !

URLPuzzler.java

import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashSet;

public class URLPuzzler {
    public static void main(String ... a) throws MalformedURLException, InterruptedException {
        HashSet set = new HashSet();
        set.add(new URL("http://google.com"));
        System.out.println("containing `new URL(\"http://google.com\")` ? : " + set.contains(new URL("http://google.com")));
        Thread.sleep(60000);
        System.out.println("containing `new URL(\"http://google.com\")` ? : " + set.contains(new URL("http://google.com")));
    }
}