Help me with my project !

Question

My project objective : To design the simulation of a poker game and to evaluate a standard poker hand.
public class Card {
private String suit;
private String rank; // Ace-King
public static final String [] CSUIT =
{"Hearts","Diamonds","Clubs","Spades"};
public static final String [] CRANK =
{"Ace","Two","Three","Four","Five","Six","Seven","Eight","
Nine",
"Ten","Jack","Queen","King"};
public Card (String s, String r) {
suit = s; rank = r;
public String getSuit() {
return suit;
public String getRank() {
return rank;
public String toString() {
String result = rank + " of " + suit;
return result;
public class Pack {
private Card [] pack = new Card [52];
int x = 0;
public Pack () {
for (int i=0; i<Card.CSUIT.length; i++) {
for (int j=0; j<Card.CRANK.length; j++) {
String col = Card.CSUIT;
String siz = Card.CRANK[j];
pack[x++] = new Card(col,siz);
// Not sure if this is correct or not
public void shufflePack() {
for (int i = 0; i < Card.CSUIT.length; i++) {
i = (int) ( Card.CSUIT.length * Math.random() );
for (int j = 0; j < Card.CRANK.length; j++) {
j = (int) ( Card.CRANK.length * Math.random() );
public Card getCard(int n) { // whats this for?
return pack[n];
public class PokerHand {
private Pack [] phand = new Pack [5]; //correct?
// Not sure if correct or not
public boolean isFlush() {
CSUIT f = new CSUIT();
String flush = f.getSuit();
for(int i = 1; i < 5; i++){
if(!(phand.toString().equals(flush)))
return true;
return false;
Questions:
1.) For class Pack.java, I need a method shufflePack() to randomise the sequence of cards in the pack. Need some advice and explanation on how I do it, my method is surely wrong I know :(
2.) For class PokerHand.java, it represents a pokerhand of 5 playing cards, I need a method isFlush() which returns true if the poker hand has a flush, or false otherwise (boolean), flush is 5 cards of the same suit. Advice and explanations? I'm not sure if the constructor is correct too?
Sorry, I'm super new to this, and the lessons is kinda fast for me to catch up. Any help would be greatly appreciated! Thanks in advance!
P.S. Try and look at this program in a noob kinda way. Because i got some great advice from nice people but I just don't understand when they tried to explain Vector to me, which i had not learn yet.

Answer 1

Reply #1 was very helpful to your shufflePack() method.
Basically, you can create a second array of 52 cards, like tempPack[52] or something. Now, all you need to do is loop through every card in pack[], and put it into a random index in tempPack. Once you've done that for every card, set pack equal to tempPack.
Pseudocode:
Card [] tempPack = new Card[52];
for (0 to 51) {
    // -pick a random number between 0 and 51
    // -if tempPack[randomnumber] is empty, put pack[loop index] into that position
    // -if there's already a card in tempPack[randomnumber], keep picking random numbers until you find an empty spot
//all cards from pack[] should now be in a random position in tempPack[]
pack = tempPack;You could also reverse this and pick random cards from pack[] and add them in order to tempPack[]. Doesn't matter. Just make sure you include every card, and don't grab the same card twice.