我真的可以帮到你了！
我解决了大部分错误，但我现在仍然坚持这个错误。
对于长代码很抱歉，如果您发现我可能错过的任何其他错误或错误，请告诉我们。非常感谢你的帮助＆lt; 3
我一直收到这个错误，我似乎无法弄清楚原因：
Exception in thread "main" java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Scanner.java:1585)
at mypokergame1.MyPokerGame.play(MyPokerGame.java:338)
我的卡类：
import java.util.*;
import java.util.Scanner;
/** class PlayingCardException: It is used for errors related to Card and Deck objects
* Do not modify this class!
*/
class PlayingCardException extends Exception {
/* Constructor to create a PlayingCardException object */
PlayingCardException (){
super ();
}
PlayingCardException ( String reason ){
super ( reason );
}
}
/** class Card : for creating playing card objects
* it is an immutable class.
* Rank - valid values are 1 to 13
* Suit - valid values are 0 to 3
* Do not modify this class!
*/
class Card {
/* constant suits and ranks */
static final String[] Suit = {"Clubs", "Diamonds", "Hearts", "Spades" };
static final String[] Rank = {"","A","2","3","4","5","6","7","8","9","10","J","Q","K"};
/* Data field of a card: rank and suit */
private int cardRank; /* values: 1-13 (see Rank[] above) */
private int cardSuit; /* values: 0-3 (see Suit[] above) */
/* Constructor to create a card */
/* throw PlayingCardException if rank or suit is invalid */
public Card(int rank, int suit) throws PlayingCardException {
if ((rank < 1) || (rank > 13))
throw new PlayingCardException("Invalid rank:"+rank);
else
cardRank = rank;
if ((suit < 0) || (suit > 3))
throw new PlayingCardException("Invalid suit:"+suit);
else
cardSuit = suit;
}
/* Accessor and toString */
/* You may impelemnt equals(), but it will not be used */
public int getRank() { return cardRank; }
public int getSuit() { return cardSuit; }
public String toString() { return Rank[cardRank] + " " + Suit[cardSuit]; }
/* Few quick tests here */
public static void main(String args[])
{
try {
Card c1 = new Card(1,3); // A Spades
System.out.println(c1);
c1 = new Card(10,0); // 10 Clubs
System.out.println(c1);
c1 = new Card(10,5); // generate exception here
}
catch (PlayingCardException e)
{
System.out.println("PlayingCardException: "+e.getMessage());
}
}
}
/** class Decks represents : n decks of 52 playing cards
* Use class Card to construct n * 52 playing cards!
*
* Do not add new data fields!
* Do not modify any methods
* You may add private methods
*/
class Decks {
/* this is used to keep track of original n*52 cards */
private List<Card> originalDecks;
/* this starts with n*52 cards deck from original deck */
/* it is used to keep track of remaining cards to deal */
/* see reset(): it resets dealDecks to a full deck */
private List<Card> dealDecks;
/* number of decks in this object */
private int numberDecks;
/**
* Constructor: Creates default one deck of 52 playing cards in originalDecks and
* copy them to dealDecks.
* initialize numberDecks=n
* Note: You need to catch PlayingCardException from Card constructor
* Use ArrayList for both originalDecks & dealDecks
*/
public Decks()
{
// implement this method!
originalDecks = new ArrayList<Card>();
numberDecks=1;
for (int i = 0; i < numberDecks; i++) {
for (int j = 0; j <= 3; j++) {
for (int k = 1; k <= 13; k++) {
try {
originalDecks.add(new Card(k, j));
} catch (PlayingCardException e) {
System.out.println("PlayingCardException: " + e.getMessage());
}
}
}
}
dealDecks = new ArrayList<Card>(originalDecks);
}
/**
* Constructor: Creates n decks (52 cards each deck) of playing cards in
* originalDecks and copy them to dealDecks.
* initialize numberDecks=n
* Note: You need to catch PlayingCardException from Card constructor
* Use ArrayList for both originalDecks & dealDecks
*/
public Decks(int n)
{
// implement this method!
originalDecks = new ArrayList<Card>();
numberDecks = n;
for (int i = 0; i < numberDecks; i++) {
for (int j = 0; j <= 3; j++) {
for (int k = 1; k <= 13; k++) {
try {
originalDecks.add(new Card(k, j));
} catch (PlayingCardException e) {
System.out.println("PlayingCardException: " + e.getMessage());
}
}
}
}
dealDecks = new ArrayList<Card>(originalDecks);
}
/**
* Task: Shuffles cards in deal deck.
* Hint: Look at java.util.Collections
*/
public void shuffle()
{
// implement this method!
java.util.Collections.shuffle(dealDecks);
}
/**
* Task: Deals cards from the deal deck.
*
* @param numberCards number of cards to deal
* @return a list containing cards that were dealt
* @throw PlayingCardException if numberCard > number of remaining cards
*
* Note: You need to create ArrayList to stored dealt cards
* and should removed dealt cards from dealDecks
*
*/
public List<Card> deal(int numberCards) throws PlayingCardException
{
// implement this method!
List dealtCards = new ArrayList<Card>();
if (numberCards > dealDecks.size()) {
throw new PlayingCardException("Not enough cards to deal");
}
for (int i = 0; i < numberCards; i++) {
dealtCards.add(dealDecks.remove(0));
}
return dealtCards;
}
/**
* Task: Resets deal deck by getting all cards from the original deck.
*/
public void reset()
{
// implement this method!
dealDecks = new ArrayList<Card>();
for(Card card : originalDecks) {
dealDecks.add(card);
}
}
/**
* Task: Return number of remaining cards in deal deck.
*/
public int remain()
{
return dealDecks.size();
}
/**
* Task: Returns a string representing cards in the deal deck
*/
public String toString()
{
return ""+dealDecks;
}
/* Quick test */
/* */
/* Do not modify these tests */
/* Generate 2 decks of cards */
/* Loop 2 times: */
/* Deal 30 cards for 4 times */
/* Expect exception last time */
/* reset() */
public static void main(String args[]) {
System.out.println("******* Create 2 decks of cards *********\n\n");
Decks decks = new Decks(2);
for (int j=0; j < 2; j++)
{
System.out.println("\n************************************************\n");
System.out.println("Loop # " + j + "\n");
System.out.println("Before shuffle:"+decks.remain()+" cards");
System.out.println("\n\t"+decks);
System.out.println("\n==============================================\n");
int numHands = 4;
int cardsPerHand = 30;
for (int i=0; i < numHands; i++)
{
decks.shuffle();
System.out.println("After shuffle:"+decks.remain()+" cards");
System.out.println("\n\t"+decks);
try {
System.out.println("\n\nHand "+i+":"+cardsPerHand+" cards");
System.out.println("\n\t"+decks.deal(cardsPerHand));
System.out.println("\n\nRemain:"+decks.remain()+" cards");
System.out.println("\n\t"+decks);
System.out.println("\n==============================================\n");
}
catch (PlayingCardException e)
{
System.out.println("*** In catch block : PlayingCardException : msg : "+e.getMessage());
}
}
decks.reset();
}
}
}
我的卡类：
package mypokergame1;
import java.util.*;
import java.util.Scanner;
/** class PlayingCardException: It is used for errors related to Card and Deck objects
* Do not modify this class!
*/
class PlayingCardException extends Exception {
/* Constructor to create a PlayingCardException object */
PlayingCardException (){
super ();
}
PlayingCardException ( String reason ){
super ( reason );
}
}
/** class Card : for creating playing card objects
* it is an immutable class.
* Rank - valid values are 1 to 13
* Suit - valid values are 0 to 3
* Do not modify this class!
*/
class Card {
/* constant suits and ranks */
static final String[] Suit = {"Clubs", "Diamonds", "Hearts", "Spades" };
static final String[] Rank = {"","A","2","3","4","5","6","7","8","9","10","J","Q","K"};
/* Data field of a card: rank and suit */
private int cardRank; /* values: 1-13 (see Rank[] above) */
private int cardSuit; /* values: 0-3 (see Suit[] above) */
/* Constructor to create a card */
/* throw PlayingCardException if rank or suit is invalid */
public Card(int rank, int suit) throws PlayingCardException {
if ((rank < 1) || (rank > 13))
throw new PlayingCardException("Invalid rank:"+rank);
else
cardRank = rank;
if ((suit < 0) || (suit > 3))
throw new PlayingCardException("Invalid suit:"+suit);
else
cardSuit = suit;
}
/* Accessor and toString */
/* You may impelemnt equals(), but it will not be used */
public int getRank() { return cardRank; }
public int getSuit() { return cardSuit; }
public String toString() { return Rank[cardRank] + " " + Suit[cardSuit]; }
/* Few quick tests here */
public static void main(String args[])
{
try {
Card c1 = new Card(1,3); // A Spades
System.out.println(c1);
c1 = new Card(10,0); // 10 Clubs
System.out.println(c1);
c1 = new Card(10,5); // generate exception here
}
catch (PlayingCardException e)
{
System.out.println("PlayingCardException: "+e.getMessage());
}
}
}
/** class Decks represents : n decks of 52 playing cards
* Use class Card to construct n * 52 playing cards!
*
* Do not add new data fields!
* Do not modify any methods
* You may add private methods
*/
class Decks {
/* this is used to keep track of original n*52 cards */
private List<Card> originalDecks;
/* this starts with n*52 cards deck from original deck */
/* it is used to keep track of remaining cards to deal */
/* see reset(): it resets dealDecks to a full deck */
private List<Card> dealDecks;
/* number of decks in this object */
private int numberDecks;
/**
* Constructor: Creates default one deck of 52 playing cards in originalDecks and
* copy them to dealDecks.
* initialize numberDecks=n
* Note: You need to catch PlayingCardException from Card constructor
* Use ArrayList for both originalDecks & dealDecks
*/
public Decks()
{
// implement this method!
originalDecks = new ArrayList<Card>();
numberDecks=1;
for (int i = 0; i < numberDecks; i++) {
for (int j = 0; j <= 3; j++) {
for (int k = 1; k <= 13; k++) {
try {
originalDecks.add(new Card(k, j));
} catch (PlayingCardException e) {
System.out.println("PlayingCardException: " + e.getMessage());
}
}
}
}
dealDecks = new ArrayList<Card>(originalDecks);
}
/**
* Constructor: Creates n decks (52 cards each deck) of playing cards in
* originalDecks and copy them to dealDecks.
* initialize numberDecks=n
* Note: You need to catch PlayingCardException from Card constructor
* Use ArrayList for both originalDecks & dealDecks
*/
public Decks(int n)
{
// implement this method!
originalDecks = new ArrayList<Card>();
numberDecks = n;
for (int i = 0; i < numberDecks; i++) {
for (int j = 0; j <= 3; j++) {
for (int k = 1; k <= 13; k++) {
try {
originalDecks.add(new Card(k, j));
} catch (PlayingCardException e) {
System.out.println("PlayingCardException: " + e.getMessage());
}
}
}
}
dealDecks = new ArrayList<Card>(originalDecks);
}
/**
* Task: Shuffles cards in deal deck.
* Hint: Look at java.util.Collections
*/
public void shuffle()
{
// implement this method!
java.util.Collections.shuffle(dealDecks);
}
/**
* Task: Deals cards from the deal deck.
*
* @param numberCards number of cards to deal
* @return a list containing cards that were dealt
* @throw PlayingCardException if numberCard > number of remaining cards
*
* Note: You need to create ArrayList to stored dealt cards
* and should removed dealt cards from dealDecks
*
*/
public List<Card> deal(int numberCards) throws PlayingCardException
{
// implement this method!
List dealtCards = new ArrayList<Card>();
if (numberCards > dealDecks.size()) {
throw new PlayingCardException("Not enough cards to deal");
}
for (int i = 0; i < numberCards; i++) {
dealtCards.add(dealDecks.remove(0));
}
return dealtCards;
}
/**
* Task: Resets deal deck by getting all cards from the original deck.
*/
public void reset()
{
// implement this method!
dealDecks = new ArrayList<Card>();
for(Card card : originalDecks) {
dealDecks.add(card);
}
}
/**
* Task: Return number of remaining cards in deal deck.
*/
public int remain()
{
return dealDecks.size();
}
/**
* Task: Returns a string representing cards in the deal deck
*/
public String toString()
{
return ""+dealDecks;
}
/* Quick test */
/* */
/* Do not modify these tests */
/* Generate 2 decks of cards */
/* Loop 2 times: */
/* Deal 30 cards for 4 times */
/* Expect exception last time */
/* reset() */
public static void main(String args[]) {
System.out.println("******* Create 2 decks of cards *********\n\n");
Decks decks = new Decks(2);
for (int j=0; j < 2; j++)
{
System.out.println("\n************************************************\n");
System.out.println("Loop # " + j + "\n");
System.out.println("Before shuffle:"+decks.remain()+" cards");
System.out.println("\n\t"+decks);
System.out.println("\n==============================================\n");
int numHands = 4;
int cardsPerHand = 30;
for (int i=0; i < numHands; i++)
{
decks.shuffle();
System.out.println("After shuffle:"+decks.remain()+" cards");
System.out.println("\n\t"+decks);
try {
System.out.println("\n\nHand "+i+":"+cardsPerHand+" cards");
System.out.println("\n\t"+decks.deal(cardsPerHand));
System.out.println("\n\nRemain:"+decks.remain()+" cards");
System.out.println("\n\t"+decks);
System.out.println("\n==============================================\n");
}
catch (PlayingCardException e)
{
System.out.println("*** In catch block : PlayingCardException : msg : "+e.getMessage());
}
}
decks.reset();
}
}
}
答案 0 :(得分：1)
您收到的例外内容非常丰富......学习阅读异常并跟踪它们是一个重要的过程！
在我看来，好像在MyPokerGame.java的第338行你正在调用scanner.nextLine而没有先仔细检查那个scanner.hasNextLine（）
当扫描仪没有下一行时调用nextLine（）会抛出此异常。
使用Scanner类的惯用方法是：
while(scanner.hasNextLine()){
str=scanner.nextLine();
//...
}
如果您遇到异常，请检查异常的来源并参考Exception类型的文档（或者只是将execption粘贴到google中，您可能会在StackOVerflow上找到答案的链接！）< / p>