package info.istlab.dp.dp1;

import java.util.Calendar;
import java.util.Date;

class Singleton {
    private static Singleton onlyone;
    public static Singleton getOnlyOne() {
        if (onlyone == null)
            onlyone = new Singleton();
        return onlyone;
    }
    Date created;
    private Singleton() {
        created = Calendar.getInstance().getTime();
    }
    public String toString() {
        return hashCode()+" "+created.toString();
    }
}

public class SingletonTest {
    public static void main(String[] args) {
        // Singleton single = new Singleton();
        Singleton single1 = Singleton.getOnlyOne();
        System.out.println(single1.toString());
        SingletonTest.wait(5);
        Singleton single2 = Singleton.getOnlyOne();
        System.out.println(single2.toString());
    }

    public static void wait(int sec) {
        try {
            Thread.sleep(sec * 1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}