Thread: NullPointerException in a small project

While studying a tutorial i was asked to write a simple project that displays a deck and it's cards.Then i would create one and display it's cards.I was also said to have two classes,one for a single card,and one of the deck.So i decided that a good approach is to have an array of singleCards as a field of the deck.However something is not clear to me about the initialization of the array.I think that the no-arguments constructor is called.However something is wrong,so maybe you could help
The project:
Cards.java

package cards;
public class Cards {
    public static void main(String[] args) {
        Deck pokemonCards = new Deck(10);
        pokemonCards.print();
    }
}

SingleCard.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cards;
 
/**
 *
 * @author User
 */
public class SingleCard {
 
    private int rank;
    private String suit;
    private String name;
 
    SingleCard(int r, String s, String n) {
        rank = r;
        suit = s;
        name = n;
    }
 
    SingleCard() {
        rank = 0;
        suit = "No colour";
        name = "No name";
    }
 
    public String getName() {
        return name;
    }
 
    public int getRank() {
        return rank;
    }
 
    public String getSuit() {
        return suit;
    }
 
    public void printSuit() {
        System.out.println("Card " + name + "has " + suit + "suit");
    }
 
    public void printRank() {
        System.out.println("Card " + name + "has " + rank + "rank");
    }
 
    public void printName() {
        System.out.println("Card's name is " + name);
    }
}

Deck.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cards;
 
/**
 *
 * @author User
 */
public class Deck {
 
    private SingleCard[] deck;
    private int number;
 
    Deck(int numberOfCards) {
        deck = new SingleCard[numberOfCards];
        number=numberOfCards;
//        for(int i=0 ; i<numberOfCards ; i++)
//        {
//            
//        }
    }
 
    public SingleCard getCard(int numberOfCard)
    {
        return deck[numberOfCard];
    }
 
    void print()
    {
        for(int i=0 ; i<number ; i++)
        {
            deck[i].printName();
        }
    }
}

and the error

Exception in thread "main" java.lang.NullPointerException
	at cards.Deck.print(Deck.java:)
	at cards.Cards.main(Cards.java:)
Java Result: 1

solution found-> new keyword missing!