Question

我做过纸牌游戏，类似于纸牌游戏。它差不多完成了。我遇到的最后一件事就是打印前5名。每当玩家结束游戏时，它会将score.txt文件写入他在桌子上剩下多少堆，让我们说4.所以在.txt文件中我有以下数字：1,2,3,4,5,6,7,8,9。如何从文件的前5位打印，所以它是1,2,3,4,5。

DeckOfCards class:
import java.io.*;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

public class DeckOfCards {
private ArrayList<Cards> deck;
private int currentCard=-1; //index of the next card to be dealt
private Scanner in;
private int i;
//ArrayList<Integer> indexesToRemove = new ArrayList();
/**
 *
 * Constructor to build a deck of cards
 */

public DeckOfCards() {
    this.deck = new ArrayList<Cards>();
}

public void removeCard(int i) {
    this.deck.remove(i);
}
public Cards getCard(int i){
    return this.deck.get(i);
}
public void addCard(Cards addCards){
    this.deck.add(addCards);
}

//Draws from the deck1
public void draw(DeckOfCards comingFrom){
    currentCard++;
    this.deck.add(comingFrom.getCard(0));
    comingFrom.removeCard(0);
}
public void saveScore(){
    try (PrintStream out = new PrintStream(new FileOutputStream("scores.txt"))) {
        out.print(deck.size());
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

卡类：

public class Cards {
private String suit;
private String value;


public Cards(String suit, String value)
{
  this.suit = suit;
  this.value = value;
}

public String getSuit() {
    return suit;
}

public void setSuit(String suit) {
    this.suit = suit;
}

public String getValue() {
    return value;
}

public void setValue(String value) {
    this.value = value;
}

@Override
public String toString() {
    return suit + value;
}
}

希望它有所帮助。我摆脱了一些方法，我认为它们并不有用。还有菜单，就像我说的每个案例都有效，除了显示前10个结果。 1 - 打印包装（这样你可以检查它是否正常播放） 2 - 随机播放 3 - 交易卡 4 - 移动，将最后一堆移到上一个堆上 5 - 移动，将最后一堆移回两堆 6 - Amalgamate在中间堆积（通过给出他们的数字） 7 - 在命令行上打印显示的卡 8 - 为我打一次（如果有两个可能的动作，则进行'最远'动作） 9 - 多次为我打球 10 - 显示前10名结果

Answer 1

当游戏结束时，读取内存中的输入文件（如列表中所示），将新结果添加到排行榜中应该进入的位置，将新结果写入文件中，然后取出第一个列表（元素0是最佳分数，元素n是最差分数）。

public void endGame(int finalScore) throws IOException {
    List<String> scores = retrieveScores();
    addNewScore(finalScore, scores);
    writeScores(scores);
    showLeaderBoard(scores);
}

private List<String> retrieveScores() throws IOException {
    BufferedReader reader = new BufferedReader(new FileReader("score.txt"));
    String scoreLine = reader.readLine(); // read line that contains scores
    List<String> scores = new ArrayList<>();
    if (scoreLine != null) { // in case of first game
        String[] tempScore = scoreLine.split(", ");
        scores = new ArrayList<>(Arrays.asList(tempScore));
    }
    reader.close();
    return scores;
}

private void addNewScore(int finalScore, List<String> scores) {
    boolean foundSpotForNewScore = false;
    int i = 0;
    while (!foundSpotForNewScore && i < scores.size()) {
        if (finalScore <= Integer.parseInt(scores.get(i))) {
            foundSpotForNewScore = true;
        } 
        i++;
    }
    scores.add(i, String.valueOf(finalScore));
}

private void writeScores(List<String> scores) throws IOException {
    FileWriter writer = new FileWriter("score.txt");
    String outputScores = scores.toString();
    outputScores = outputScores.replace("[", "");
    outputScores = outputScores.replace("]", "");
    writer.write(outputScores);
    writer.close();
}

private void showLeaderBoard(List<String> scores) {
    System.out.println("*** TOP 5 LEADERBOARD ***");
    int i = 0;
    while (i < 5 && i < scores.size()) {
        System.out.println(scores.get(i));
        i++;
    }
    System.out.println("*** TOP 5 LEADERBOARD ***");
}

从txt文件java

1 个答案: