Tämä on tyhmää

package fi.tapiola.samples.fpchallenge;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

@SuppressWarnings("serial")
class NuppineulakoodinOlio implements Serializable {
    public static final NuppineulakoodinOlio NULL = new NuppineulakoodinOlio( );
    private final String hoplaa;

    private NuppineulakoodinOlio( ) {
        this.hoplaa = null;
    }

    public NuppineulakoodinOlio( String data ) {
        this.hoplaa = data;
    }
}

public class NoNoNo {
    public static void main( String[ ] args ) throws IOException, ClassNotFoundException {
        NuppineulakoodinOlio no = NuppineulakoodinOlio.NULL;
        // Serialisoi null-marker
        ByteArrayOutputStream baos = new ByteArrayOutputStream( );
        ObjectOutputStream oos = new ObjectOutputStream( baos );
        oos.writeObject( no );
        // Ja saman tien deserialisointi
        ByteArrayInputStream bais = new ByteArrayInputStream( baos.toByteArray( ) );
        ObjectInputStream ois = new ObjectInputStream( bais );
        NuppineulakoodinOlio olio = ( NuppineulakoodinOlio ) ois.readObject( );

        System.out.println( "Ensin alkuperäinen. Onko NULL-marker? " + ( no == NuppineulakoodinOlio.NULL ) );
        System.out.println( "Sitten alias serialisoinnin jälkeen. Onko NULL-marker? " + ( olio == NuppineulakoodinOlio.NULL ) );
    }
}