这是一个课堂作业，我不是要求任何人为我做作业，而是我在发布之前尝试了我的最佳能力，希望能收到我收到的4个错误的帮助，以及我的由于某种原因，甲板没有被洗牌。
我的作业指示：
对于此作业，您将创建一个播放简单战争游戏的程序。在这个游戏中，每个玩家都会从完整的牌组中获得一张牌。谁拥有最高价值的卡赢了。如果发牌的牌具有相同的价值，那么这是一个平局而且两位玩家都不会获胜。赢得最多回合的玩家赢得比赛。玩家无需输入（不是很有趣！）。你应该打印每个玩家的牌 处理了该轮的结果和比赛的最终结果。您可能希望使用用户输入来实现每轮之间的延迟。
我的卡类：
public class Card {
private int cardNum;
final static String[] suits = {"Spades", "Hearts", "Diamonds", "Clubs"};
final static String[] ranks = {"2", "3","4","5","6","7","8", "9","10", "Jack", "Queen", "King", "Ace"};
Card (int theCard) {
setCardNum (theCard);
}
public void setCardNum (int theCard) {
cardNum = (theCard >= 0 && theCard <= 51)? theCard: 0;
}
public int getCardNum() {
return cardNum;
}
public String toString() {
return ranks[cardNum%13] + " of " + suits[cardNum/13];
}
public String getSuit() {
return suits[cardNum/13];
}
public String getRank() {
return ranks[cardNum%13];
}
public int getValue() {
return cardNum%13;
}
}
My Deck Class（我有一个改组错误）：
public class Deck {
private Card[] deck = new Card[52];
private int topCard;
Deck() {
topCard = 0;
for (int i = 0; i < deck.length; i++)
deck[i] = new Card(i);
}
public void shuffle() {
topCard = 0;
for (int i = 0; i < 1000; i++) {
int j = (int)(Math.random()*52);
int k = (int)(Math.random()*52);
Card tmpCard = deck[j];
deck[j] = deck[k];
deck[k] = tmpCard;
}
}
public Card dealCard() {
Card theCard;
if (topCard < deck.length) {
theCard = deck[topCard];
topCard++;
}
else
theCard = null;
return theCard;
}
}
我的战争游戏主程序：
import java.util.Scanner;
public class WarGame {
public static void main(String[] args) {
Card[][] hands = new Card[2][1];
Deck myDeck = new Deck();
for (int i = 0; i < 53; i++) {
System.out.printf("\n Round %s of The War \n", i);
for (int c = 0; c < 1; c++)
for (int player = 0; player < hands.length; player++)
hands[player][c] = myDeck.dealCard();
for (int player = 0; player < hands.length; player++) {
System.out.printf("Player %d: ", player);
printHand(hands[player]);
int player1;
int player2;
if (player1.getValue() > player2.getValue())
System.out.println("Player One Wins The War");
else if (player2.getValue() > player1.getValue())
System.out.println("Player Two Wins The War");
else
System.out.println("The War Is A Tie");
}
}
}
public static void printHand(Card[] hand) {
for (int card = 0; card < hand.length; card++)
System.out.printf("%s", hand[card].toString());
System.out.println();
}
}
我的错误如下：
----jGRASP exec: javac -g WarGame.java
WarGame.java:31: error: int cannot be dereferenced
if (player1.getValue() > player2.getValue())
^
WarGame.java:31: error: int cannot be dereferenced
if (player1.getValue() > player2.getValue())
^
WarGame.java:35: error: int cannot be dereferenced
else if (player2.getValue() > player1.getValue())
^
WarGame.java:35: error: int cannot be dereferenced
else if (player2.getValue() > player1.getValue())
^
4 errors
----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
非常感谢您提供的任何帮助。
player1和player2指每位玩家每轮给出的牌
答案 0 :(得分：2)
player1和player2是ints而不是Integers（这是一个Java类）。这意味着它们不是对象，也没有方法。您可以直接将它们比作“Sam I Am”所说的。
您也可以将它们转换为整数：
if( (new Integer(player1)).compareTo(new Integer(player2)) > 0 )
但是这很无用，因为您正在进行的比较不需要任何整数方法。
所以只需使用：
if (player1 > player2)
您可以阅读this topic以了解有关整数自动装箱的详情。
答案 1 :(得分：1)
// import needed classes and packages
import java.util.Scanner;
import java.text.NumberFormat;
import java.io.IOException;
import java.util.Locale;
import java.text.DecimalFormat;
public class Program2
{public static void main(String[] args) throws IOException
{
//Declare Variables
//Creates the cards based on their suite
Card heartCard;
Card diamondCard;
Card spadeCard;
Card clubCard;
int countingPlays = 0;
Scanner keyboard = new Scanner(System.in); //Allows Input
//creates the cardPile array called DeckOfCards
CardPile deckOfCards = new CardPile();
//Creates Player1's Card Pile
CardPile player1Pile = new CardPile();
//Creates Player2's Card Pile
CardPile player2Pile = new CardPile();
//Creates the cards to fill the array (1-14 of hearts/diamonds/spades/clubs).
for(int i = 2; i < 15; i++)
{
char heart = '\u0003';
char diamond ='\u0004';
char spade = '\u0005';
char club = '\u0006';
deckOfCards.add(heartCard = new Card(heart, i));
deckOfCards.add(diamondCard = new Card(diamond, i));
deckOfCards.add(spadeCard = new Card(spade, i));
deckOfCards.add(clubCard = new Card(club, i));
}
//prints out the deck of Cards
System.out.println("Deck Of Cards: " + deckOfCards);
//shuffles the cards
deckOfCards.shuffle();
//Prints out the deck of cards after they are shuffled
System.out.println("Deck of Cards after shuffled: " + deckOfCards);
//Checking the size of the Deck
System.out.println("" + deckOfCards.size());
//Takes the deckOfCards and splits them up into 2 piles for Player1 and Player2
for(int i = 0; i < 26; i++)
{
player1Pile.add(deckOfCards.getTopCard());
player2Pile.add(deckOfCards.getTopCard());
}
//Prints out the deck of Cards and then the player 1's pile and player 2's pile
System.out.println("Player 1's Cards: " + player1Pile);
System.out.println("Player 2's Cards: " + player2Pile);
//checking the size of each players Pile
//Prints the header for the game
System.out.println("Lets have a war!!!");
//Testing tricky spot where the getTopCard removes a the topcard
/*
Card removedTopCard = player1Pile.getTopCard();
System.out.println("Getting player1Pile: " + removedTopCard);
player1Pile.add(removedTopCard);
System.out.println("Player1Pile is " + player1Pile);
System.out.println("Player1Pile size is " +player1Pile.size());
*/
//Starts the game of War
try
{ //do while the sizes of the player piles are greater than 0.
do
{
//gets the top cards of each players Pile
Card player1RemovedTopCard = player1Pile.getTopCard();
Card player2RemovedTopCard = player2Pile.getTopCard();
//Compares the 2 cards to test which is bigger. If player 1's card is smaller than player 2 is the winner
if(player1RemovedTopCard.compareTo(player2RemovedTopCard) < player2RemovedTopCard.compareTo(player1RemovedTopCard))
{
System.out.println("Player 1: " + player1RemovedTopCard + " Player 2: " + player2RemovedTopCard);
System.out.println("Player 2 is the Winner");
player2Pile.add(player1RemovedTopCard);
player2Pile.add(player2RemovedTopCard);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has:" + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
//Compares the 2 cards to test which is bigger. If player 2's card is smaller than player 1 is the winner.
else if(player1RemovedTopCard.compareTo(player2RemovedTopCard) > player2RemovedTopCard.compareTo(player1RemovedTopCard))
{
System.out.println("Player 1: " + player1RemovedTopCard + " Player 2: " + player2RemovedTopCard);
System.out.println("Player 1 is the Winner");
player1Pile.add(player1RemovedTopCard);
player1Pile.add(player2RemovedTopCard);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has:" + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
//Else it is a war
else
{
System.out.println("Player 1: " + player1RemovedTopCard + " Player 2: " + player2RemovedTopCard);
System.out.println("WAR!!!!!!!");
//War if the player has only 4 cards left.
if(player1Pile.size() == 1 || player2Pile.size() == 1)
{
Card player1RemovedTopCard2 = player1Pile.getTopCard();
Card player2RemovedTopCard2 = player2Pile.getTopCard();
System.out.println("Player1's 2nd card is: " + player1RemovedTopCard2 + " Player2's 2nd card is: " + player2RemovedTopCard2);
if(player1RemovedTopCard2.compareTo(player2RemovedTopCard2) > player2RemovedTopCard2.compareTo(player1RemovedTopCard2))
{
System.out.println("Player 1 is the winner of the War! ");
player1Pile.add(player1RemovedTopCard);
player1Pile.add(player1RemovedTopCard2);
player1Pile.add(player2RemovedTopCard);
player1Pile.add(player2RemovedTopCard2);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
else if(player1RemovedTopCard2.compareTo(player2RemovedTopCard2) < player2RemovedTopCard2.compareTo(player1RemovedTopCard2))
{
System.out.println("Player 2 is the winner of the War! ");
player2Pile.add(player1RemovedTopCard);
player2Pile.add(player1RemovedTopCard2);
player2Pile.add(player2RemovedTopCard);
player2Pile.add(player2RemovedTopCard2);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
else
{
if(player2Pile.size() == 0)
{
player1Pile.add(player2RemovedTopCard2);
player1Pile.add(player2RemovedTopCard);
player1Pile.add(player1RemovedTopCard2);
player1Pile.add(player1RemovedTopCard);
}
else
{
player2Pile.add(player2RemovedTopCard2);
player2Pile.add(player2RemovedTopCard);
player2Pile.add(player1RemovedTopCard2);
player2Pile.add(player1RemovedTopCard);
}
}
}
//War if the player has only 2 cards left.
else if(player1Pile.size() == 2 || player2Pile.size() == 2)
{
Card player1RemovedTopCard2 = player1Pile.getTopCard();
Card player1RemovedTopCard3 = player1Pile.getTopCard();
Card player2RemovedTopCard2 = player2Pile.getTopCard();
Card player2RemovedTopCard3 = player2Pile.getTopCard();
do
{
System.out.println("Player1's 3rd card is: " + player1RemovedTopCard3 + " Player2's 3rd card is: " + player2RemovedTopCard3);
if(player1RemovedTopCard3.compareTo(player2RemovedTopCard3) > player2RemovedTopCard3.compareTo(player1RemovedTopCard3))
{
System.out.println("Player 1 is the winner of the War! ");
player1Pile.add(player1RemovedTopCard);
player1Pile.add(player1RemovedTopCard2);
player1Pile.add(player1RemovedTopCard3);
player1Pile.add(player2RemovedTopCard);
player1Pile.add(player2RemovedTopCard2);
player1Pile.add(player2RemovedTopCard3);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
else if(player1RemovedTopCard3.compareTo(player2RemovedTopCard3) < player2RemovedTopCard3.compareTo(player1RemovedTopCard3))
{
System.out.println("Player 2 is the winner of the War! ");
player2Pile.add(player1RemovedTopCard);
player2Pile.add(player1RemovedTopCard2);
player2Pile.add(player1RemovedTopCard3);
player2Pile.add(player2RemovedTopCard);
player2Pile.add(player2RemovedTopCard2);
player2Pile.add(player2RemovedTopCard3);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
//Continues the war if the top card at the end of the war are still equal
}while(player1RemovedTopCard3.compareTo(player2RemovedTopCard3) == player2RemovedTopCard3.compareTo(player1RemovedTopCard3));
}
//War if the player has only 3 cards left.
else if(player1Pile.size() == 3 || player2Pile.size() == 3)
{
Card player1RemovedTopCard2 = player1Pile.getTopCard();
Card player1RemovedTopCard3 = player1Pile.getTopCard();
Card player1RemovedTopCard4 = player1Pile.getTopCard();
Card player2RemovedTopCard2 = player2Pile.getTopCard();
Card player2RemovedTopCard3 = player2Pile.getTopCard();
Card player2RemovedTopCard4 = player2Pile.getTopCard();
do
{
System.out.println("Player1's fourth card is: " + player1RemovedTopCard4 + " Player2's fourth card is: " + player2RemovedTopCard4);
if(player1RemovedTopCard4.compareTo(player2RemovedTopCard4) > player2RemovedTopCard4.compareTo(player1RemovedTopCard4))
{
System.out.println("Player 1 is the winner of the War! ");
player1Pile.add(player1RemovedTopCard);
player1Pile.add(player1RemovedTopCard2);
player1Pile.add(player1RemovedTopCard3);
player1Pile.add(player1RemovedTopCard4);
player1Pile.add(player2RemovedTopCard);
player1Pile.add(player2RemovedTopCard2);
player1Pile.add(player2RemovedTopCard3);
player1Pile.add(player2RemovedTopCard4);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
else if(player1RemovedTopCard4.compareTo(player2RemovedTopCard4) < player2RemovedTopCard4.compareTo(player1RemovedTopCard4))
{
System.out.println("Player 2 is the winner of the War! ");
player2Pile.add(player1RemovedTopCard);
player2Pile.add(player1RemovedTopCard2);
player2Pile.add(player1RemovedTopCard3);
player2Pile.add(player1RemovedTopCard4);
player2Pile.add(player2RemovedTopCard);
player2Pile.add(player2RemovedTopCard2);
player2Pile.add(player2RemovedTopCard3);
player2Pile.add(player2RemovedTopCard4);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
//Continues the war if the top card at the end of the war are still equal
}while(player1RemovedTopCard4.compareTo(player2RemovedTopCard4) == player2RemovedTopCard4.compareTo(player1RemovedTopCard4));
}
//war if player has more than 4 cards
else if(player1Pile.size() >= 4 || player2Pile.size() >= 4)
{
Card player1RemovedTopCard2 = player1Pile.getTopCard();
Card player1RemovedTopCard3 = player1Pile.getTopCard();
Card player1RemovedTopCard4 = player1Pile.getTopCard();
Card player1RemovedTopCard5 = player1Pile.getTopCard();
Card player2RemovedTopCard2 = player2Pile.getTopCard();
Card player2RemovedTopCard3 = player2Pile.getTopCard();
Card player2RemovedTopCard4 = player2Pile.getTopCard();
Card player2RemovedTopCard5 = player2Pile.getTopCard();
do
{
System.out.println("Player1's 5th card is: " + player1RemovedTopCard5 + " Player2's 5th card is: " + player2RemovedTopCard5);
if(player1RemovedTopCard5.compareTo(player2RemovedTopCard5) > player2RemovedTopCard5.compareTo(player1RemovedTopCard5))
{
System.out.println("Player 1 is the winner of the War! ");
player1Pile.add(player1RemovedTopCard);
player1Pile.add(player1RemovedTopCard2);
player1Pile.add(player1RemovedTopCard3);
player1Pile.add(player1RemovedTopCard4);
player1Pile.add(player1RemovedTopCard5);
player1Pile.add(player2RemovedTopCard);
player1Pile.add(player2RemovedTopCard2);
player1Pile.add(player2RemovedTopCard3);
player1Pile.add(player2RemovedTopCard4);
player1Pile.add(player2RemovedTopCard5);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
else if(player1RemovedTopCard5.compareTo(player2RemovedTopCard5) < player2RemovedTopCard5.compareTo(player1RemovedTopCard5))
{
System.out.println("Player 2 is the winner of the War! ");
player2Pile.add(player1RemovedTopCard);
player2Pile.add(player1RemovedTopCard2);
player2Pile.add(player1RemovedTopCard3);
player2Pile.add(player1RemovedTopCard4);
player2Pile.add(player1RemovedTopCard5);
player2Pile.add(player2RemovedTopCard);
player2Pile.add(player2RemovedTopCard2);
player2Pile.add(player2RemovedTopCard3);
player2Pile.add(player2RemovedTopCard4);
player2Pile.add(player1RemovedTopCard5);
System.out.println("Player 1 has: " + player1Pile.size() + " cards left.");
System.out.println("Player 2 has: " + player2Pile.size() + " cards left.");
System.out.println("\n");
keyboard.nextLine();
}
//Continues the war if the top card at the end of the war are still equal
}while(player1RemovedTopCard5.compareTo(player2RemovedTopCard5) == player2RemovedTopCard5.compareTo(player1RemovedTopCard5));
}
}
//Adds to the plays that keep track of how many plays have been made
countingPlays++;
//. If there are 10 plays it shuffles and prints out a message that the cards have been shuffled.
if(countingPlays >= 10)
{
player1Pile.shuffle();
player2Pile.shuffle();
System.out.println("Cards Shuffled");
//resets the counter to 0
countingPlays = 0;
}
//Continues the game of war while the players piles are bigger than 0
}while(player1Pile.size() > 0 || player2Pile.size() > 0);
}
//Catches the Array 0 error and prints out who is the winner based on who has zero cards.
catch (IndexOutOfBoundsException theException) //tries to catch this type...
{
if(player1Pile.size() == 0)
{
System.out.println("Winner is Player 2" );
}
else
System.out.println("Winner is Player 1" );
}
} //end of main
}//end of class
答案 2 :(得分：0)
我猜不到，但我认为您不需要在getValue()上致电int
像
这样的陈述if (player1 > player2)
player1和player2都是整数，完全没问题
答案 3 :(得分：0)
您需要在hands中获取Card对象的值。您目前实际上并未向player1和player2分配任何内容。要获得卡片的价值，您需要在实际对象上调用.getValue()，例如int player1 = hands[0][0].getValue();
我更新了您的main功能，以演示其外观，并进行了一些其他可能会对您有所帮助的更改。
public static void main(String[] args) {
Card[][] hands = new Card[2][1];
Deck myDeck = new Deck();
//reduced this to 26 iterations because two cards are dealt each iteration
for (int i = 0; i < 26; i++) {
System.out.printf("\n Round %s of The War \n", i);
//You really don't need to loop just once here...
//Simply assign the card to hands[player][0] since that's the only option
//for (int c = 0; c < 1; c++)
for (int player = 0; player < hands.length; player++)
hands[player][0] = myDeck.dealCard();
for (int player = 0; player < hands.length; player++) {
System.out.printf("Player %d: ", player);
printHand(hands[player]);
}
int player1 = hands[0][0].getValue(); //get the value from the Card object
int player2 = hands[1][0].getValue();
if (player1 > player2)
System.out.println("Player One Wins The War");
else if (player2 > player1)
System.out.println("Player Two Wins The War");
else
System.out.println("The War Is A Tie");
}
}
答案 4 :(得分：0)
对于随机播放方法，您可以使用以下代码：
public void shuffle()
{
Collections.shuffle(deck);
}