我们应该都知道有一个游戏叫做21点，最近用Java写了这个游戏，希望读者能够提出宝贵意见。
这个游戏我写了4个Java文件。
游戏说明：
开始游戏
可以做一些选择，输入cm表示要查看自己的可见牌和不可见牌，输入co表示查看其它玩家的不可见牌，输入cp表示查看其它玩家的passed情况，输入no或者输入其它字符表示表示什么都不做。
开始发牌
输入rv or rV or RV or Rv(不区分大小写)表示需要（require）可见牌(visible)，所以可以选择输入这四个字符中的一个。
输入rh ot rH or or RH or Rh表示需要（require）不可见牌（hidden），所以可以选择输入这四个字符中的一个。
下面就是轮流给没有passed的玩家进行游戏，我用了一个自定义的KEY类作为函数的参数，这样key的值的改变就不是值传递了.
最后就是游戏输赢的判定了.
package Game;
import java.util.Scanner;
public class Player {
String name;
Game game;
private int hiddenCard;
public int sumOfVisibleCards;
public boolean passed;
public Player(String name,Game game)//给定的一个游戏构造一个玩家
{
this.name=name;
this.game=game;
}
void takeCard(int card, boolean hidden)//得到一张牌
{
System.out.println("The card you acquire is:"+card);
if(hidden==true)
hiddenCard+=card;
else
sumOfVisibleCards+=card;
}
int getScore()//获取总点数
{
return this.hiddenCard+this.sumOfVisibleCards;
}
public void initialHiddenCard(int point)//初始化隐藏牌
{
this.hiddenCard=point;
}
void play()//决定要牌或者pass,检查自己的隐藏牌和可见牌，那些玩家通过
{
System.out.println("Player name:"+this.name);
System.out.println("Before round you cards.visible:"+this.sumOfVisibleCards+",hidden:"+this.hiddenCard);
Scanner in =new Scanner(System.in);
char c1='p',c2='v';
String tstr;
String str;
System.out.println("Please decide 'cm','co','cp' or 'no'.");
tstr=in.nextLine();
switch(tstr)//决定要牌之前的操作
{
case "cm":
System.out.println("name:"+this.name);
System.out.println("visible:"+this.sumOfVisibleCards+",hidden:"+this.hiddenCard);
break;
case "co":
if(this.game.player1==this)
{
System.out.println("name:"+this.game.player2.name+",visible"+this.game.player2.sumOfVisibleCards);
System.out.println("name:"+this.game.player3.name+",visible"+this.game.player3.sumOfVisibleCards);
}
else if(this.game.player2==this)
{
System.out.println("name:"+this.game.player1.name+",visible"+this.game.player1.sumOfVisibleCards);
System.out.println("name:"+this.game.player3.name+",visible"+this.game.player3.sumOfVisibleCards);
}
else
{
System.out.println("name:"+this.game.player1.name+",visible"+this.game.player1.sumOfVisibleCards);
System.out.println("name:"+this.game.player2.name+",visible"+this.game.player2.sumOfVisibleCards);
}
break;
case "cp":
System.out.println("name:"+this.game.player1.name+",passed or not?"+this.game.player1.passed);
System.out.println("name:"+this.game.player2.name+",passed or not?"+this.game.player2.passed);
System.out.println("name:"+this.game.player3.name+",passed or not?"+this.game.player3.passed);
break;
case "no":break;
default:break;
}
System.out.println("Please decide whether pass and hidden! 'r/Rh/H','r/Rv/V' or 'p/P'.");
System.out.print("please enter your choice:");
str=in.nextLine();
c1=str.charAt(0);
if(str.length()>=2)
c2=str.charAt(1);
//输出错误默认玩家选择过
if(c1=='R' || c1=='r')
{
if(c2=='H' || c2=='h')
this.takeCard(this.game.dealer.nextCard(),true);
else if(c2=='V' || c2=='v')
this.takeCard(this.game.dealer.nextCard(),false);
else
{
System.out.println("Enter Error! default passed");
this.passed=true;
}
}
else if(c1=='P' || c1=='p')
this.passed=true;
else
{
System.out.println("Enter Error! default passed");
this.passed=true;
}
System.out.println("After round you cards.visible:"+this.sumOfVisibleCards+",hidden:"+this.hiddenCard);
}
}
`package Game;
import java.util.Random;
/**
* Represents a player in this simplified version of the
* @see 21 card game.
* @author LWD
* @version 2021-3-30
*/
public class Dealer {
String name;
Player player1;
Player player2;
Player player3;
Random random = new Random();
public Dealer(String name, Player player1, Player player2,Player player3)
{
this.name=name;
this.player1=player1;
this.player2=player2;
this.player3=player3;
}
void runGame()
{
this.deal();//初始化每个玩家的两张牌
//在都没有passed的情况下
Key k=new Key();
while(this.player1.passed==false || this.player2.passed==false || this.player3.passed==false)
{
this.allowPlay(k);
k.key++;
}
}
void allowPlay(Key k)//轮流给没有passed的玩家机会要牌
{
if(k.key%3==0)
{
if(this.player1.passed==false)
this.player1.play();
else
{
k.key++;
allowPlay(k);
}
}
else if(k.key%3==1)
{
if(this.player2.passed==false)
this.player2.play();
else
{
k.key++;
allowPlay(k);
}
}
else
{
if(this.player3.passed==false)
this.player3.play();
else
{
k.key++;
allowPlay(k);
}
}
}
int nextCard()//返回下一张牌的大小，范围是1~10.
{
return 1+random.nextInt(10);
}
void deal()//处理两张初始的牌
{
//第一张没有隐藏的牌
this.player1.sumOfVisibleCards=nextCard();
this.player2.sumOfVisibleCards=nextCard();
this.player3.sumOfVisibleCards=nextCard();
//第二张隐藏的牌
this.player1.initialHiddenCard(nextCard());
this.player2.initialHiddenCard(nextCard());
this.player2.initialHiddenCard(nextCard());
}
private boolean playerWins(int score1, int score2, int score3)
{
//三个都超过了21点,没有胜利者
if(this.player1.getScore()>21 && this.player2.getScore()>21 && this.player3.getScore()>21)
return false;
//两个超过21点肯定有胜利者
//1个超过21点,其它两个相等,没有胜利者
else if(this.player1.getScore()>21 && this.player2.getScore()==this.player3.getScore())
return false;
else if(this.player2.getScore()>21 && this.player1.getScore()==this.player3.getScore())
return false;
else if(this.player3.getScore()>21 && this.player1.getScore()==this.player2.getScore())
return false;
//三个都不超过21点
//三个相等 或者 是其中两个相等并且大于第三个
//都不相等肯定有胜利者
if(this.player1.getScore()==this.player2.getScore() && this.player1.getScore()==this.player3.getScore())
return false;
else if(this.player1.getScore()==this.player2.getScore() && this.player1.getScore()>this.player3.getScore())
return false;
else if(this.player1.getScore()==this.player3.getScore() && this.player1.getScore()>this.player2.getScore())
return false;
else if(this.player2.getScore()==this.player3.getScore() && this.player2.getScore()>this.player1.getScore())
return false;
return true;
}
void scoreGame()//决定获胜者并且打印
{
System.out.println("player1:"+this.player1.name+",total score:"+this.player1.getScore());
System.out.println("player2:"+this.player2.name+",total score:"+this.player2.getScore());
System.out.println("player1:"+this.player3.name+",total score:"+this.player3.getScore());
if( this.playerWins(this.player1.getScore(),this.player2.getScore(),this.player3.getScore())==false)
System.out.println("The Current game have no Winner!");
//两个大于21点
else if(this.player1.getScore()>21 && this.player2.getScore()>21)
System.out.println("Congratulation!!!The "+this.player3.name+" is the Winner!");
else if(this.player1.getScore()>21 && this.player3.getScore()>21)
System.out.println("Congratulation!!!The "+this.player2.name+" is the Winner!");
else if(this.player2.getScore()>21 && this.player3.getScore()>21)
System.out.println("Congratulation!!!The "+this.player1.name+" is the Winner!");
//一个大于21点 其中两个不等
else if(this.player1.getScore()>21)
{
if(this.player2.getScore()>this.player3.getScore())
System.out.println("Congratulation!!!The "+this.player2.name+" is the Winner!");
else
System.out.println("Congratulation!!!The "+this.player3.name+" is the Winner!");
}
else if(this.player2.getScore()>21)
{
if(this.player1.getScore()>this.player3.getScore())
System.out.println("Congratulation!!!The "+this.player1.name+" is the Winner!");
else
System.out.println("Congratulation!!!The "+this.player3.name+" is the Winner!");
}
else if(this.player3.getScore()>21)
{
if(this.player1.getScore()>this.player2.getScore())
System.out.println("Congratulation!!!The "+this.player1.name+" is the Winner!");
else
System.out.println("Congratulation!!!The "+this.player2.name+" is the Winner!");
}
//都小于等于21点
//两个相等 但是小于第三个
if(this.player1.getScore()==this.player2.getScore() && this.player1.getScore()<this.player3.getScore())
System.out.println("Congratulation!!!The "+this.player3.name+" is the Winner!");
else if(this.player1.getScore()==this.player3.getScore() && this.player1.getScore()<this.player2.getScore())
System.out.println("Congratulation!!!The "+this.player2.name+" is the Winner!");
else if(this.player2.getScore()==this.player3.getScore() && this.player2.getScore()<this.player1.getScore())
System.out.println("Congratulation!!!The "+this.player1.name+" is the Winner!");
//三个都不相等
else if(Math.max(Math.max(this.player1.getScore(), this.player2.getScore()), this.player3.getScore())==this.player1.getScore())
System.out.println("Congratulation!!!The "+this.player1.name+" is the Winner!");
else if(Math.max(Math.max(this.player1.getScore(), this.player2.getScore()), this.player3.getScore())==this.player2.getScore())
System.out.println("Congratulation!!!The "+this.player2.name+" is the Winner!");
else if(Math.max(Math.max(this.player1.getScore(), this.player2.getScore()), this.player3.getScore())==this.player3.getScore())
System.out.println("Congratulation!!!The "+this.player3.name+" is the Winner!");
}
}
package Game;
public class Game {
Player player1;
Player player2;
Player player3;
Dealer dealer;
public static void main(String[] args) {
System.out.println("**************Wellcom to the game '21 point'***************");
System.out.println("The follow in is the rule of the game.");
System.out.println("enter 'R' or 'r' mean not pass,'P' or 'p' mean pass.");
System.out.println("enter 'H' or 'h' mean hidden,'V' or 'v' mean visible");
System.out.println("enter sample: 'rv' mean not pass and visible");
System.out.println("------------------some tips----------------------");
System.out.println("Before make your chioce,you can check you hidden and visible,");
System.out.println("check others' visible and witch player passed or do nothig.");
System.out.println("enter 'cm' means check yours,'co' means check others,'cp' means check where pass,'no' means do nothing");
System.out.println("***********************Game Start***************************");
//初始化操作
Game game=new Game();
game.player1=new Player("Mike",game);
game.player2=new Player("Jack",game);
game.player3=new Player("Bob",game);
game.dealer=new Dealer("LWD",game.player1,game.player2,game.player3);
System.out.println("player1:"+game.player1.name+"\nplayer2:"+game.player2.name+"\nplayer1:"+game.player3.name+"\ndealer:"+game.dealer.name);
System.out.println("********************************");
game.dealer.runGame();
System.out.println("Game over! Thanks dealer LWD so much q'(^_^)'p");
game.dealer.scoreGame();
}
}
package Game;
//作为函数的参数，是一个辅助工具
public class Key {
int key;
}
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