NimSystem实现

题目

题目比较长，我直接放截图吧

 

简述

　　一个比较经典的类与对象的题目，三个类实现了一个比较简单的系统，具体的每个类的要求可以从上面的题目描述中看出（只要你有耐心读完。。），不再赘述，代码如下

代码实现

整体设计

　　类和属性、方法

NimGame类

/**
 * @author jyroy
 * NimGame类
 */
public class NimGame {
    public int stonecount;
    public int upperremoval;
    public String player1;
    public String player2;

}

NimPlayer类

import java.text.DecimalFormat;

/**
 * @author jyroy
 * player类
 */
public class NimPlayer {
    private String username;
    private String familyname;
    private String givenname;
    private int gamesplayed;
    private int gameswon;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getFamilyname() {
        return familyname;
    }
    public void setFamilyname(String familyname) {
        this.familyname = familyname;
    }
    public String getGivenname() {
        return givenname;
    }
    public void setGivenname(String givenname) {
        this.givenname = givenname;
    }
    public int getGamesplayed() {
        return gamesplayed;
    }
    public void setGamesplayed(int gamesplayed) {
        this.gamesplayed = gamesplayed;
    }
    public int getGameswon() {
        return gameswon;
    }
    public void setGameswon(int gameswon) {
        this.gameswon = gameswon;
    }
    @Override
    public String toString() {
        return  username + "," + familyname + "," + givenname
                + "," + gamesplayed + " games, " + gameswon + " wins";
    }
    
    public String rate() {
        return String.valueOf(gameswon/gamesplayed*100);
    }
    
    public void rank() {
        String s = gameswon/gamesplayed*100+"%";
        DecimalFormat df=new DecimalFormat("00");
        String str2=df.format(gamesplayed);
        System.out.printf("%-5s",s);
        System.out.printf("| ");
        System.out.printf(str2 + " games | "+givenname + " " + familyname+"
");
    }

    
}

NimSystem类

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.TreeMap;

/**
 * @author jyroy
 * NimSystem类
 */
public class NimSys {
    
    static ArrayList<NimPlayer> playerList = new ArrayList<NimPlayer>();
    
    /**
     * add a new user
     * @param username
     * @param family_name
     * @param given_name
     */
    public static void addplayer(String username,String family_name, String given_name) {
        NimPlayer nimplayer = new NimPlayer();
        nimplayer.setUsername(username);
        nimplayer.setFamilyname(family_name);
        nimplayer.setGivenname(given_name);
        nimplayer.setGamesplayed(0);
        nimplayer.setGameswon(0);
        for(int i=0;i<playerList.size();i++) {
            if(playerList.get(i).getUsername().equals(username)) {
                System.out.println("The player already exists.");
                return;
            }
        }
        playerList.add(nimplayer);
        return;
    }
    
    
    /**
     * remove a user or all users
     * @param username
     */
    public static void removeplayer(String username) {
        if(username!=null) {
            for(int i=0;i<playerList.size();i++) {
                if(playerList.get(i).getUsername().equals(username)) {
                    playerList.remove(i);
                    return;
                }
            }
            System.out.println("The player does not exist.");
            return;
        }else if(username==null) {
            System.out.println("Are you sure you want to remove all players? (y/n)");
            Scanner sc=new Scanner(System.in);
            String s=sc.nextLine();
            if(s.equals("y")) {
                playerList.clear();
            }
            return;
        }
    }
    
    
    /**
     * edit a user
     * @param username
     * @param family_name
     * @param given_name
     */
    public static void editplayer(String username,String family_name, String given_name) {
        for(int i=0;i<playerList.size();i++) {
            if(playerList.get(i).getUsername().equals(username)) {
                playerList.get(i).setUsername(username);
                playerList.get(i).setFamilyname(family_name);
                playerList.get(i).setGivenname(given_name);
                return;
            }
        }
        System.out.println("The player does not exist.");
        return;
    }
    
    
    /**
     * reset a user
     * @param username
     */
    public void resetstats(String username) {
        if(username!=null) {
            for(int i=0;i<playerList.size();i++) {
                if(playerList.get(i).getUsername().equals(username)) {
                    playerList.get(i).setGamesplayed(0);
                    playerList.get(i).setGameswon(0);
                    return;
                }
            }
            System.out.println("The player does not exist.");
        }else if(username==null) {
            System.out.println("Are you sure you want to reset all player statistics? (y/n)");
            Scanner sc=new Scanner(System.in);
            String s=sc.nextLine();
            if(sc.equals("y")) {
                for(int i=0;i<playerList.size();i++) {
                    playerList.get(i).setGamesplayed(0);
                    playerList.get(i).setGameswon(0);
                }
            }
        }
    }
    
    
    /**
     * display a user or all users
     * @param username
     */
    public static void displayplayer(String username) {
        if(username!=null) {
            for(int i=0;i<playerList.size();i++) {
                if(playerList.get(i).getUsername().equals(username)) {
                    System.out.println(playerList.get(i).toString());
                    return;
                }
            }
            System.out.println("The player does not exist.");
        }else if(username==null) {
            for(int i=0;i<playerList.size();i++) {
                System.out.println(playerList.get(i).toString());
            }
        }
        return;
    }

    
    /**
     * rank all users in desc or asc
     * @param order
     */
    public static void rankings(String order) {
        Map<String, String> map = new TreeMap<String, String>();
        for(int i=0;i<playerList.size();i++) {
            map.put(playerList.get(i).getUsername(), playerList.get(i).rate());
        }
        if(order==null||order.equals("desc")){
            List<Entry<String, String>> list = new ArrayList<Entry<String, String>>(map.entrySet());
            
            Collections.sort(list,new Comparator<Map.Entry<String,String>>() {
                
                public int compare(Entry<String, String> o1, Entry<String, String> o2) {
                    return o2.getValue().compareTo(o1.getValue());
                }
            });
            
            int c=0;
            Iterator<Entry<String, String>> it2 = list.iterator();
            while(it2.hasNext()) {
                Entry<String, String> entry = it2.next();
                for(int j=0;j<playerList.size();j++) {
                    if(entry.getKey().equals(playerList.get(j).getUsername())) {
                        playerList.get(j).rank();
                    }
                }
                if(c==9) {
                    return;
                }
                c+=1;
            }
        }else if(order.equals("asc")) {
            Iterator<Entry<String, String>> it2 = map.entrySet().iterator();
            int c=0;
            while(it2.hasNext()) {
                Entry<String, String> entry = it2.next();
                for(int j=0;j<playerList.size();j++) {
                    if(entry.getKey().equals(playerList.get(j).getUsername())) {
                        playerList.get(j).rank();
                    }
                }
                if(c==9) {
                    return;
                }
                c+=1;
            }
        }
    }
    
    /**
     * start a game
     * @param initialstones
     * @param upperbound
     * @param username1
     * @param username2
     */
    public static void startgame(int initialstones, int upperbound, String username1, String username2) {
        int f=0;
        NimPlayer player1 = null;
        NimPlayer player2 = null;
        for(int i=0;i<playerList.size();i++) {
            if(playerList.get(i).getUsername().equals(username1)) {
                f+=1;
                player1 = playerList.get(i);
            }else if(playerList.get(i).getUsername().equals(username2)) {
                f+=1;
                player2 = playerList.get(i);
            }
        }
        if(f==2) {
            System.out.println("
"+"Initial stone count:" + initialstones);
            System.out.println("Maximum stone removal: " + upperbound);
            System.out.println("Player 1: " + player1.getGivenname() + " " + player1.getFamilyname());
            System.out.println("Player 2: " + player2.getGivenname() + " " + player2.getFamilyname()+"
");
            int currentstone = initialstones;
            int round = 1;
            while(round>0) {
                System.out.printf("
"+currentstone + "stones left: ");
                for(int i1=0;i1<currentstone;i1++) {
                    System.out.printf("* ");
                }
                if(round%2==1) {
                    System.out.println("
"+username1 + "’s turn - remove how many?");
                }else {
                    System.out.println("
"+username2 + "’s turn - remove how many?");
                }
                Scanner sc=new Scanner(System.in);
                int s=sc.nextInt();
                if(s>upperbound) {
                    System.out.println("Invalid move. You must remove between 1 and " + upperbound + "stones.");
                    continue;
                }else if(s==0) {
                    System.out.printf("Invalid move. You must remove between 1 and ");
                    if(upperbound>currentstone) {
                        System.out.print(currentstone);
                    }else {
                        System.out.print(upperbound);
                    }
                    System.out.printf("stones.");
                    continue;
                }else {
                    currentstone -= s;
                }
                if(currentstone==0) {
                    System.out.println("Game Over");
                    if(round%2==1) {
                        System.out.println(username2 + "  wins!");
                        player2.setGameswon(player2.getGameswon()+1);
                        player2.setGamesplayed(player2.getGamesplayed()+1);
                        player1.setGamesplayed(player1.getGamesplayed()+1);
                        return;
                    }else {
                        System.out.println(username1 + "  wins!");
                        player1.setGameswon(player1.getGameswon()+1);
                        player1.setGamesplayed(player1.getGamesplayed()+1);
                        player2.setGamesplayed(player2.getGamesplayed()+1);
                        return;
                    }
                }
                round+=1;
            }
        }else {
            System.out.println("One of the players does not exist.");
            return;
        }
    }
    /**
     * Exits the Nimsys program
     */
    public static void exit() {
        System.out.println("");
        System.exit(0);
    }
    
    public static void main(String[] args) {
        System.out.println("Welcome to Nim");
        while(true) {
            System.out.printf("$");
            Scanner sc=new Scanner(System.in);
            String s=sc.nextLine();
            String[] arr = s.split(" ");
            if(arr[0].equals("addplayer")) {
                addplayer(arr[1].split(",")[0], arr[1].split(",")[1], arr[1].split(",")[2]);
            }else if(arr[0].equals("removeplayer")){
                if(arr.length!=1) removeplayer(arr[1]);
                else removeplayer(null);
            }else if(arr[0].equals("editplayer")) {
                editplayer(arr[1].split(",")[0], arr[1].split(",")[1], arr[1].split(",")[2]);
            }else if(arr[0].equals("displayplayer")) {
                if(arr.length!=1) displayplayer(arr[1]);
                else displayplayer(null);
            }else if(arr[0].equals("rankings")) {
                if(arr.length!=1) rankings(arr[1]);
                else rankings(null);
            }else if(arr[0].equals("startgame")) {
                startgame(Integer.parseInt(arr[1].split(",")[0]), Integer.parseInt(arr[1].split(",")[1]), arr[1].split(",")[2], arr[1].split(",")[3]);
            }else if(arr[0].equals("exit")) {
                exit();
            }
        }
    }
    
    
}