Stuck in array

Question

I made one simple program, inside the program, I have array of 5. I've created 5 cards objects in array, each object has 2 variables inside(the suit and the value, e.g. 5 of hearts). now, i wanna compare whether there are 2 same cards, 2 same cards are not allowed, so I need to get each of the variable from 1 card and compare to another
I have no idea how to access each variable, can someone help me?
thanks

Answer 1

Hi SkY_bLu3,
The guys above me are absolutely right, but I suspect you don't know what a hash-code is... No harm in reading some of the article's yawmark mentioned, though!
A (really-and-far-too) simple implementation for your problem would be something like this:
* Card
public class Card {
    private String suit = "";
    private int value = -1;
    /** Constructor */
    public Card(String suit, int value) {
        this.suit = suit;
        this.value = value;
    public String getSuit() {
        return suit;
    public int getValue() {
        return value;
    /** Compare another card with 'this' card */
    public boolean equals(Card other) {
        return (other.getSuit().equals(this.suit)
                && other.getValue() == this.value);
    /** String representation of the Card */
    public String toString() {
        return "["+suit+", "+value+"]";
} // class CardTest it with this:
* TestCard
public class TestCard {
    public static void main(String[] args) {
        Card[] hand = new Card[5];
        String[] suits = {"Hearts", "Clubs", "Diamonds", "Spades"};
        /** fill the hand with cards */
        for(int j = 0; j < hand.length; j++) {
            Card c = new Card(suits[j%4], (j%4)+1);
            hand[j] = c;
        /** print the hand */
        for(int j = 0; j < hand.length; j++) {
            System.out.println(hand[j]);
        /** check the equals-method */
        for(int j = 1; j < hand.length; j++) {
            System.out.println(hand[0]+" equals "+hand[j]+"? "+hand[0].equals(hand[j]));
} // class TestCardGood luck!