21点的基本知识
21点是世界上比较流行的扑克游戏项目
除掉大小王的一副扑克牌，共计52张牌
21点不区分花色，其中A----10均代表扑克牌本身的点数J Q K代表10点
区分庄家和闲家，其中闲家可以优先要牌 而庄家在与闲家点数一样大的情况下，庄家赢，当有一方点数超过21点则另一方自动获胜，庄家的点数如果正好是21点，那么庄家直接获胜，其他情况以点数大的获胜
流程设计：
人机对战模式！
1由用户输入选择作庄还是作闲，电脑自动成为另一方
2随机为双方发两张牌
3询问闲家是否要牌，一直到闲家不再要或者发生暴点为止
4询问庄家要牌，一直到庄家不再要或者暴点或者正好21点为止
5比较游戏输赢
6询问是否继续
7统计战果
技术问题：
1． 发牌的时候随机发取
2． 发牌出来还要判断是否本张牌已经发过了！如果已经发过了，那么就要重新随机发另外一张牌，要保证牌的唯一性
3． 当给电脑派牌的时候 要考虑AI的问题！让电脑的逻辑稍微模拟人的思维
主类：
import java.util.Scanner;
public class CardTest {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int win = 0;
int lose = 0;
while (true) {
System.out.println("请问做庄家1/闲家2?");
int num = sc.nextInt();
if (num == 1) {
System.out.println("你选择做庄家");
Ruler r = new Ruler();
int n=r.play();
if(n==0) {
//庄家赢
win++;
}
else
lose++;
} else if (num == 2) {
System.out.println("你选择做闲家");
Player p = new Player();
int n= p.play();
if(n==1) {
//闲家赢
win++;
}
else
lose++;
} else {
System.out.println("输入错误，重新输入");
}
System.out.println("是否继续Y/N");
if (sc.next().charAt(0) == 'Y')
continue;
else {
System.out.println("游戏结束");
System.out.println("赢："+win);
System.out.println("输："+lose);
break;
}
}
}
}
import java.util.Random;
public class Card {
int index = 0; // 发牌索引下标
String[] card = { "红桃A", "红桃2", "红桃3", "红桃4", "红桃5", "红桃6", "红桃7", "红桃8",
"红桃9", "红桃10", "红桃J", "红桃Q", "红桃K",
"黑桃A",
"黑桃2", "黑桃3", "黑桃4", "黑桃5", "黑桃6", "黑桃7", "黑桃8", "黑桃9", "黑桃10", "黑桃J", "黑桃Q", "黑桃K",
"梅花A", "梅花2", "梅花3",
"梅花4", "梅花5", "梅花6", "梅花7", "梅花8", "梅花9", "梅花10", "梅花J", "梅花Q", "梅花K", "方片A", "方片2", "方片3", "方片4", "方片5",
"方片6", "方片7", "方片8", "方片9", "方片10", "方片J", "方片Q", "方片K", };
public void show() {
for (int i = 0; i < 52; i++) {
System.out.println(card[i]);
}
}
// 洗牌，打乱牌的顺序
public void cutcards() {
int index=0;
Random rand = new Random();
for (int i = 0; i < 52; i++) {
int n = rand.nextInt(52);
String temp;
temp = card[n];
card[n] = card[51 - n];
card[51 - n] = temp;
}
}
// 发牌,按顺序发牌，从下标0开始
public String deal() {
String c = card[index];
index++;
return c;
}
}
public class JudgeNum {
public int judgeString(String num) {
String word= num.substring(2);
if(word.equals("A")) {
return 1;
}
else if(num.substring(2).equals("J")||
num.substring(2).equals("Q")||
num.substring(2).equals("K")||
num.substring(2).equals("10")) {
return 10;
}
else {
int n=(int)num.substring(2).charAt(0)-48;
return n;
}
}
}
import java.util.Random;
import java.util.Scanner; public class Player { /*
* 选择做闲家
先得牌
您选择: 闲家
发牌时间:
闲家:红桃K 方片3
庄家:黑桃6 梅花4
* 闲家要牌时间:
闲家是否要牌(Y/N)?
Y
发牌:黑桃A
* 闲家是否要牌(Y/N)?
Y 发牌:梅花5 闲家是否要牌(Y/N)?
N 闲家不再要牌:
闲家点数:19点
庄家要牌时间:
庄家要牌:梅花5
* 庄家要牌:黑桃4
庄家不再要牌:
庄家点数19点 庄赢
*
*
*
*/
Scanner sc= new Scanner(System.in); public int play() {
int playernum=0;
int rulernum=0;
String player1;
String player2; String ruler1;
String ruler2; JudgeNum judge = new JudgeNum();
Card c = new Card();
c.cutcards();
player1 = c.deal();
player2 = c.deal(); System.out.println("发牌时间:");
System.out.println("闲家:" + player1 + " " + player2);
playernum=judge.judgeString(player1)+judge.judgeString(player2); ruler1 = c.deal();
ruler2 = c.deal();
System.out.println("庄家:" + ruler1 + " " + ruler2);
rulernum=judge.judgeString(ruler1)+judge.judgeString(ruler2);
System.out.println("闲家点数："+playernum); System.out.println("庄家点数："+rulernum); System.out.println("闲家要牌时间： " ); //循环要牌阶段
while(true) {
System.out.println("闲家是否要牌(Y/N)? " ); char w = sc.next().charAt(0);
if(w=='Y') {
System.out.println("闲家继续要牌");
String player3=c.deal();
System.out.println("闲家: "+player3 ); playernum=playernum+judge.judgeString(player3);
System.out.println("闲家点数："+playernum);
if(playernum>21)
{
System.out.println("闲家爆掉，庄家赢");
return 0;
} }
else if(w=='N') {
System.out.println("闲家不再要牌，闲家点数:"+playernum);
break;
} } System.out.println("庄家要牌时间"); while(true) {
if(rulernum>=playernum) {
System.out.println("庄家不再要牌，庄家赢");
return 0;
}
else {
System.out.println("庄家要牌时间：");
String ruler3=c.deal();
System.out.println("庄家："+ruler3);
rulernum=rulernum+judge.judgeString(ruler3);
if(rulernum>21) {
System.out.println("庄家点数"+rulernum);
System.out.println("庄家爆掉，闲家赢");
return 1;
}
else if(rulernum>=playernum) { System.out.println("庄家点数:"+rulernum+" 闲家点数:"+playernum);
System.out.println("庄家赢");
return 0;
} } } } }
import java.util.Scanner;
public class Ruler {
// 选择做庄家
/*
* 闲家先要牌
*
*/
Scanner sc = new Scanner(System.in);
public int play() {
int playernum = 0;
int rulernum = 0;
String player1;
String player2;
String ruler1;
String ruler2;
JudgeNum judge = new JudgeNum();
Card c = new Card();
c.cutcards();
player1 = c.deal();
player2 = c.deal();
System.out.println("发牌时间:");
System.out.println("闲家:" + player1 + " " + player2);
playernum = judge.judgeString(player1) + judge.judgeString(player2);
ruler1 = c.deal();
ruler2 = c.deal();
System.out.println("庄家:" + ruler1 + " " + ruler2);
rulernum = judge.judgeString(ruler1) + judge.judgeString(ruler2);
System.out.println("闲家点数：" + playernum);
System.out.println("庄家点数：" + rulernum);
System.out.println("闲家要牌时间：");
while (true) {
String player3;
if (playernum <rulernum) {
System.out.println("闲家要牌");
player3 = c.deal();
System.out.println("闲家:" + player3);
playernum = playernum + judge.judgeString(player3);
} else if (playernum > 21) {
System.out.println("闲家点数：" + playernum);
System.out.println("闲家爆掉，庄家赢");
return 0;
} else if (playernum >= 15) {
System.out.println("闲家不再要牌");
System.out.println("闲家点数" + playernum);
break;
}else {
System.out.println("闲家要牌");
String player4 = c.deal();
System.out.println("闲家:" + player4);
playernum=playernum+judge.judgeString(player4);
if (playernum > 21) {
System.out.println("闲家点数：" + playernum);
System.out.println("闲家爆掉，庄家赢");
return 0;
}
}
}
// 庄家要牌时间
System.out.println("庄家要牌时间：");
while (true) {
System.out.println("庄家是否要牌(Y/N)");
char w = sc.next().charAt(0);
if (w == 'Y') {
System.out.println("庄家继续要牌");
String ruler3 = c.deal();
System.out.println("庄家: " + ruler3);
rulernum = rulernum + judge.judgeString(ruler3);
System.out.println("庄家点数：" + rulernum);
if (rulernum > 21) {
System.out.println("庄家爆掉，闲家赢");
return 1;
}
} else if (w == 'N') {
System.out.println("庄家不再要牌，庄家点数:" + rulernum);
break;
}
}
if (rulernum >= playernum) {
System.out.println("庄家赢");
return 0;
} else {
System.out.println("闲家赢");
return 1;
}
}
}