Question

Edit:

Main method…

creates a new player.

Player class…

creates an instance of hand.

Hand class…

creates an arraylist

thats all. its pretty simple

public class Player 
{
/*------------------------
 * instantiating variable
 -----------------------*/
protected Hand hand;
protected boolean active = false;

/*------------
 * constructor
 -----------*/
    public Player()
{
    hand = new Hand();
    hand.setSize(5);
}



public class Hand extends Player
    {
/*-----------------------------------------
 * variable declaration
 ----------------------------------------*/
ArrayList <Card> hand;
protected int size;
Card temp;

     /*------------------------------------------
 * constructor
 * creates arraylist of cards to keep in hand
 ------------------------------------------*/
public Hand()
{
    hand = new ArrayList<Card>();
}

/*-------------------------------
 * sets the size of the max hand
 ------------------------------*/
public void setSize(int newSize)
{
    size = newSize;

}

Edit: the error is:

Exception in thread “main” java.lang.StackOverflowError

at Player.<init>(Player.java:19)

at Hand.<init>(Hand.java:21)

line 19 in Player is the “public Player()”

line 21 of Hand is the “public Hand()”

just for reference

Answer 1

Hand extends Player and therefore has all of Player‘s data members, including

protected Hand hand;

To initialize those inherited members, Hand‘s constructor implicitly calls Player‘s.

1. You call Hand‘s constructor.
2. It calls Player‘s constructor.
3. Player‘s constructor executes new Hand(), and the cycle repeats indefinitely until you run out of stack space.