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+"\n");
     }

 }

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("\n"+"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()+"\n");
             int currentstone = initialstones;
             int round = 1;
             while(round>0) {
                 System.out.printf("\n"+currentstone + "stones left: ");
                 for(int i1=0;i1<currentstone;i1++) {
                     System.out.printf("* ");
                 }
                 if(round%2==1) {
                     System.out.println("\n"+username1 + "’s turn - remove how many?");
                 }else {
                     System.out.println("\n"+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();
             }
         }
     }

 }