syntax error when calling method

[gemann]

Hi, I'm getting this error when I call :
myCard.addCardBackInHand(card);
this is the error I get:

C:\java\War>javac TryDeal.java
TryDeal.java:23: cannot resolve symbol
symbol  : variable card
location: class TryDeal
    Hand returnHand = myCard.addCardBackInHand(card);
                                               ^
1 error

these are some of my classes :

import java.util.*;
class Hand
{
  private Stack hand = new Stack();
   public void add(Card card)
   { 
     hand.push(card);
   }
   public Card getCard()
   {
     return (Card)hand.pop();
   }
   public Card addCardBackInHand(Card card)
    {
      return (Card)hand.push(card);
    }
   public String toString()
   { 
     Iterator cards = hand.iterator();
     StringBuffer str = new StringBuffer();
      while(cards.hasNext()) 
      str.append(" "+ (Card)cards.next());
      return str.toString();
  }

class TryDeal
{
  public static void main(String[] args)
  {
    CardDeck deck = new CardDeck();
    deck.shuffle();

    Hand myHand = deck.dealHand(5);
    Hand yourHand = deck.dealHand(5);
  

    Card myCard   = (Card)myHand.getCard();
    Card yourCard = (Card)yourHand.getCard(); 

    Hand returnHand = myCard.addCardBackInHand(card);
    
    System.out.println("\nYour hand is"+yourCard);
    System.out.println("\nMy hand is"+myCard);
    System.out.println("\nMy return hand is"+returnHand);
  }
}

class Card implements Comparable
{

  public Card(int value, int suit) throws IllegalArgumentException
  {
    if(value >= ACE && value <= KING)
      this.value = value;
    else
      throw new IllegalArgumentException(&quot;Invalid card value&quot;);
    if(suit >= HEARTS && suit <= SPADES)
      this.suit = suit;
    else
      throw new IllegalArgumentException(&quot;Invalid suit&quot;);
  }
 public int compareTo(Object card)
  {
    if(this.suit != ((Card)card).suit)
      return suit < ((Card)card).suit ? -1: 1;
    else
      if(this.value == ((Card)card).value)
        return 0;
      else
        return value < ((Card)card).value ? -1 : 1;
  }

  public String toString()
  {
    String cardStr;
    switch(value)
    {
      case ACE: cardStr = &quot;A&quot;;
                break;
      case JACK: cardStr = &quot;J&quot;;
                break;
      case QUEEN: cardStr = &quot;Q&quot;;
                break;
      case KING: cardStr = &quot;K&quot;;
                break;
      default: cardStr = Integer.toString(value);
                break;                       
    }

    // Here we add the suit to the value of the card

    switch(suit)
    {
      case CLUBS: cardStr += &quot;C&quot;;
                break;
      case DIAMONDS: cardStr += &quot;D&quot;;
                break;
      case HEARTS: cardStr += &quot;H&quot;;
                break;
      case SPADES: cardStr += &quot;S&quot;;
                break;
    }
    return cardStr;
  }


  // Suit values
  public static final int HEARTS = 0;
  public static final int CLUBS = 1;
  public static final int DIAMONDS = 2;
  public static final int SPADES = 3;

  // Card face values
  public static final int ACE = 1;
  public static final int JACK = 11;
  public static final int KING = 12;
  public static final int QUEEN = 13;

  private int suit;
  private int value;
}

I tried to instanciate a new Card object :
Card card = new Card(); but I got these errors :

C:\java\War>javac TryDeal.java
TryDeal.java:13: cannot resolve symbol
symbol  : constructor Card  ()
location: class Card
    Card card = new Card();
                ^
TryDeal.java:24: cannot resolve symbol
symbol  : method addCardBackInHand  (Card)
location: class Card
    Hand returnHand = myCard.addCardBackInHand(card);
                            ^
2 errors

I need some help defining the card variable.....gemann

 

[daniel135]

Any non-abstract class without an explicit constructor will have a default constructor, but if you define one that takes arguments, you can no longer use the default, no-arguments constructor. The other error occurs when you try to assign a Card object to a Hand reference- addCardBackInHand(card); returns a Card, and it can't be cast to a Hand.

 

[gemann]

I guess the next question is what constructor can I use?
Thanks....gemann

 

[Guest_imported]

In order to use the default constructor after you defined one with argument you have to re-define the default constructor,i.e. to define one that excepts no arguments.