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Serializable对象序列化实例

王朝other·作者佚名  2008-05-31
窄屏简体版  字體: |||超大  

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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