Object Serialization
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import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class CardReader {
public static void main(String[] args) {
Card3 card = new Card3(12, Card3.SPADES);
System.out.println("Card to write is: " + card);
try {
FileOutputStream out = new FileOutputStream("card.out");
ObjectOutputStream oos = new ObjectOutputStream(out);
oos.writeObject(card);
oos.flush();
} catch (Exception e) {
System.out.println("Problem serializing: " + e);
}
Card3 acard = null;
try {
FileInputStream in = new FileInputStream("card.out");
ObjectInputStream ois = new ObjectInputStream(in);
acard = (Card3) (ois.readObject());
} catch (Exception e) {
System.out.println("Problem serializing: " + e);
}
System.out.println("Card read is: " + acard);
}
}
class Card3 implements Serializable {
private int suit = UNASSIGNED;
private int number = UNASSIGNED;
public final static int UNASSIGNED = -1;
public final static int DIAMONDS = 1;
public final static int CLUBS = 2;
public final static int HEARTS = 3;
public final static int SPADES = 4;
public final static int ACE = 1;
public final static int KING = 13;
public Card3(int number, int suit) {
if (isValidNumber(number)) {
this.number = number;
} else {
//Error
}
if (isValidSuit(suit)) {
this.suit = suit;
} else {
//Error
}
}
public int getSuit() {
return suit;
}
public int getNumber() {
return number;
}
public static boolean isValidNumber(int number) {
if (number >= ACE && number <= KING) {
return true;
} else {
return false;
}
}
public static boolean isValidSuit(int suit) {
if (suit >= DIAMONDS && suit <= SPADES) {
return true;
} else {
return false;
}
}
public boolean equals(Object obj) {
if (obj instanceof Card3) {
Card3 card = (Card3) obj;
if (card.getNumber() == this.number && card.getSuit() == this.suit) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public int hashCode() {
return number * suit;
}
public String toString() {
return numberToString(this.number) + " of " + suitToString(this.suit);
}
public static String numberToString(int number) {
String result = "";
switch (number) {
case ACE:
result = "Ace";
break;
case 2:
result = "Two";
break;
case 3:
result = "Three";
break;
case 4:
result = "Four";
break;
case 5:
result = "Five";
break;
case 6:
result = "Six";
break;
case 7:
result = "Seven";
break;
case 8:
result = "Eight";
break;
case 9:
result = "Nine";
break;
case 10:
result = "Ten";
break;
case 11:
result = "Jack";
break;
case 12:
result = "Queen";
break;
case KING:
result = "King";
break;
case UNASSIGNED:
result = "Invalid Number";
break;
}
return result;
}
public static String suitToString(int suit) {
String result = "";
switch (suit) {
case DIAMONDS:
result = "Diamonds";
break;
case CLUBS:
result = "Clubs";
break;
case HEARTS:
result = "Hearts";
break;
case SPADES:
result = "Spades";
break;
case UNASSIGNED:
result = "Invalid Suit";
break;
}
return result;
}
}
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