我的任务是尝试创建一个纸牌游戏，但我正试图在jframe中显示纸牌。我有一个Displayable实例和一个Displayablehanddeck和实现它的卡。我一直纠结于在他们必须覆盖的显示方法中放什么，以及我应该在jframe类/jpanel中放什么。非常感谢您的帮助。
public interface Displayable {
public void display(Graphics g, int x, int y);
}
一个可显示类的示例。
public class DisplayableCard extends Card implements Displayable {
Graphics g;
String filename = "\images\classic-cards\7.png";
Image image = new ImageIcon(getClass().getResource(filename)).getImage();
@Override
public void display(Graphics G, int x,int y)
{
}
}
我们得到了这个代码来使用，并被告知-"通过创建JFrame的一个简单子类来测试你的新类，该子类包含CardGamePanel的一个实例。只需构造一个合适的Displayable对象并将其添加到CardGamePanel实例中，即可测试每个Displayable">
public class CardGamePanel extends JPanel{
private Displayable theItem;
private int x, y;
@Override
public void paint(Graphics g) {
if (theItem != null)
{
theItem.display(g, x, y);
}
}
public void setItem(Displayable item, int x, int y) {
theItem = item;
this.x = x;
this.y = x;
}
}
所以我尝试了这个：
public class simple extends JFrame
{
CardGamePanel c = new CardGamePanel();
Displayable d;
DisplayableDeck d1 = new DisplayableDeck();
}
public class mainclass {
public static void main(String args[])
{
DisplayableDeck d1 = new DisplayableDeck();
simple s1 = new simple();
s1.c.setItem(d1, 50, 50); // like this?
}
}
非常感谢您的帮助：)
你可以试试这个程序
public class HighLow {
public static void main(String[] args) {
System.out.println("This program lets you play the simple card game,");
System.out.println("HighLow. A card is dealt from a deck of cards.");
System.out.println("You have to predict whether the next card will be");
System.out.println("higher or lower. Your score in the game is the");
System.out.println("number of correct predictions you make before");
System.out.println("you guess wrong.");
System.out.println();
int gamesPlayed = 0; // Number of games user has played.
int sumOfScores = 0; // The sum of all the scores from
// all the games played.
double averageScore; // Average score, computed by dividing
// sumOfScores by gamesPlayed.
boolean playAgain; // Record user's response when user is
// asked whether he wants to play
// another game.
do {
int scoreThisGame; // Score for one game.
scoreThisGame = play(); // Play the game and get the score.
sumOfScores += scoreThisGame;
gamesPlayed++;
TextIO.put("Play again? ");
playAgain = TextIO.getlnBoolean();
} while (playAgain);
averageScore = ((double)sumOfScores) / gamesPlayed;
System.out.println();
System.out.println("You played " + gamesPlayed + " games.");
System.out.printf("Your average score was %1.3f.n", averageScore);
} // end main()
/**
* Lets the user play one game of HighLow, and returns the
* user's score on that game. The score is the number of
* correct guesses that the user makes.
*/
private static int play() {
Deck deck = new Deck(); // Get a new deck of cards, and
// store a reference to it in
// the variable, deck.
Card currentCard; // The current card, which the user sees.
Card nextCard; // The next card in the deck. The user tries
// to predict whether this is higher or lower
// than the current card.
int correctGuesses ; // The number of correct predictions the
// user has made. At the end of the game,
// this will be the user's score.
char guess; // The user's guess. 'H' if the user predicts that
// the next card will be higher, 'L' if the user
// predicts that it will be lower.
deck.shuffle(); // Shuffle the deck into a random order before
// starting the game.
correctGuesses = 0;
currentCard = deck.dealCard();
TextIO.putln("The first card is the " + currentCard);
while (true) { // Loop ends when user's prediction is wrong.
/* Get the user's prediction, 'H' or 'L' (or 'h' or 'l'). */
TextIO.put("Will the next card be higher (H) or lower (L)? ");
do {
guess = TextIO.getlnChar();
guess = Character.toUpperCase(guess);
if (guess != 'H' && guess != 'L')
TextIO.put("Please respond with H or L: ");
} while (guess != 'H' && guess != 'L');
/* Get the next card and show it to the user. */
nextCard = deck.dealCard();
TextIO.putln("The next card is " + nextCard);
/* Check the user's prediction. */
if (nextCard.getValue() == currentCard.getValue()) {
TextIO.putln("The value is the same as the previous card.");
TextIO.putln("You lose on ties. Sorry!");
break; // End the game.
}
else if (nextCard.getValue() > currentCard.getValue()) {
if (guess == 'H') {
TextIO.putln("Your prediction was correct.");
correctGuesses++;
}
else {
TextIO.putln("Your prediction was incorrect.");
break; // End the game.
}
}
else { // nextCard is lower
if (guess == 'L') {
TextIO.putln("Your prediction was correct.");
correctGuesses++;
}
else {
TextIO.putln("Your prediction was incorrect.");
break; // End the game.
}
}
/* To set up for the next iteration of the loop, the nextCard
becomes the currentCard, since the currentCard has to be
the card that the user sees, and the nextCard will be
set to the next card in the deck after the user makes
his prediction. */
currentCard = nextCard;
TextIO.putln();
TextIO.putln("The card is " + currentCard);
} // end of while loop
TextIO.putln();
TextIO.putln("The game is over.");
TextIO.putln("You made " + correctGuesses
+ " correct predictions.");
TextIO.putln();
return correctGuesses;
} // end play()
} // end class
你可以在这个小程序中试用游戏，它模拟程序：