java实现猜拳小游戏，Game代码有错误，求指正

Question

Game.java (想实现由用户选择三局两胜还是五局三胜的赛制）

import java.util.Scanner;

public class Game {
	Scanner sc = new Scanner(System.in);
	User User;//用户对象
	Computer Computer;//电脑玩家对象
	int count;//对战次数
	int score;//分数
	public void initial() {//游戏的初始化方法
		User = new User();//创建用户对象
		Computer = new Computer();//创建电脑对象
		count = 0;//比赛次数
	}
	public void startGame() {
		System.out.println("--------------------猜拳游戏开始了-----------------------\n\n");
		System.out.println("出拳规则：1.石头 2.剪刀 3.布");
		System.out.print("请选择对方角色(1:孙悟空 2:唐僧 3:猪八戒)");
		int choose = sc.nextInt();//用户输入
		switch (choose) {
		case 1:
			Computer.computerName = "孙悟空";//对象.变量
			System.out.println("你与" + Computer.computerName + "PK");
			break;
		case 2:
			Computer.computerName = "唐僧";
			System.out.println("你与" + Computer.computerName + "PK");
			break;
		case 3:
			Computer.computerName = "猪八戒";
			System.out.println("你与" + Computer.computerName + "PK");
			break;
		default:
			System.out.println("输入错误！");
			break;
		}
		System.out.println("请输入玩家姓名：");
		User.userName = sc.next();//对象.变量  赋值
		System.out.println("是否开始游戏（yes/no）");
		String con = sc.next();
		if (con.equals("no")) {
			System.out.println("退出游戏！");
		}
		int perFist;//定义人出拳的数字
		int comFist;//定义电脑出拳的数字
		perFist = User.showFirst();//对象.方法  赋值
		comFist = Computer.chuQuan();//对象.方法  赋值
		int computerCount = 0;//一局中电脑获胜的次数
		int playerCount = 0;//一句中玩家获胜的次数
		while (con.equals("yes")) {
			System.out.println("游戏规则：1.三局两胜    2.五局三胜");
			Scanner sc = new Scanner(System.in);
			int choose2 = sc.nextInt();// 接收用户选择的赛事
			switch (choose2) {
			case 1:
				for (int i = 1; i <= 3;) {
					if (perFist == comFist) {// 平局
						System.out.println("平局，再接再厉！");
						break;// 跳过平局的本次循环，为保证平局的i不做计算继续保持三局两胜的游戏规则
					} else if ((perFist == 1 && comFist == 3) || (perFist == 2 && comFist == 1)
							|| (perFist == 3 && comFist == 2)) {
						System.out.println("恭喜,你获胜了！");
						playerCount++;// 一局中玩家胜场数
					} else {
						System.out.println("很遗憾，你输了！");
						computerCount++;// 一局中电脑胜场数
					}
					// 判断双方是否连胜两局，如果连胜两局需要 break;结束
					if (playerCount == 2) {
						System.out.println("最终玩家获胜！");
						User.score++;
						break;
					} else if (computerCount == 2) {
						System.out.println("最终电脑获胜！");
						Computer.score++;
						break;
					}
					i++;// 平局跳过的循环不进行累加运算，来保持三局两胜的游戏规则
					break;
				}
				
				count++;
			
				case2: for (int i = 1; i <= 5;) {
					if (perFist == comFist) {// 平局
						System.out.println("平局，再接再厉！");
						break;// 跳过平局的本次循环，为保证平局的i不做计算继续保持五局三胜的游戏规则
					} else if ((perFist == 1 && comFist == 3) || (perFist == 2 && comFist == 1)
							|| (perFist == 3 && comFist == 2)) {
						System.out.println("恭喜,你获胜了！");
						playerCount++;// 玩家胜场数
					} else {
						System.out.println("很遗憾，你输了！");
						computerCount++;// 电脑胜场数
					}
					// 判断双方是否连胜两局，如果连胜两局需要 break;结束
					if (playerCount == 3) {
						System.out.println("最终玩家获胜！");
						User.score++;
						break;
					} else if (computerCount == 3) {
						System.out.println("最终电脑获胜！");
						Computer.score++;
						break;
					}
					i++;// 平局跳过的循环不进行累加运算，来保持五局三胜的游戏规则
				}
				count++;
				break;
			default:
				System.out.println("输入有误！");
				break;
			}

			count++;// 对战次数依次加一
			System.out.println("是否进入下一轮（yes/no）");
			con = sc.next();
		}
	
		showResult();
	}


	public void showResult() {
		System.out.println("对战次数：" + count);
		System.out.println("姓名" + "\t" + "积分");
		System.out.println(User.userName + "\t" + User.score);
		System.out.println(Computer.computerName + "\t" + Computer.score);
		if (User.score > Computer.score) {
			System.out.println("恭喜"+User.userName + "赢了！");
		} else {
			System.out.println("很遗憾"+Computer.computerName + "赢了！");
		}
	}
}

Main.java

public class Main {
	public static void main(String[] args) {
		Game g = new Game();
		g.initial();// 调用初始化方法
		g.startGame();// 调用开始游戏的方法

	}
}

Computer.java

public class Computer {
	String computerName;// 电脑名
	int score;// 电脑积分

	public int chuQuan() {
		int random = (int) (Math.random() * 3) + 1;
		switch (random) {
		case 1:
			System.out.println(computerName + "出：石头");
			break;
		case 2:
			System.out.println(computerName + "出：剪刀");
			break;
		case 3:
			System.out.println(computerName + "出：布");
			break;
		default:
			System.out.println("输入有错，请重新输入：");
			break;
		}
		return random;
	}
}

User.java

import java.util.Scanner;

public class User {
	String userName;// 用户名
	int score;// 积分

	public int showFirst() {
		System.out.print("请出拳:1.剪刀2.石头3.布(输入相应的数字):");
		Scanner sc = new Scanner(System.in);
		int choice = sc.nextInt();
		switch (choice) {
		case 1:
			System.out.println("你出：石头");
			break;
		case 2:
			System.out.println("你出：剪刀");
			break;
		case 3:
			System.out.println("你出：布");
			break;
		default:
			System.out.println("输入错误!");
			break;
		}
		return choice;
	}
}

Answer 1

startGame（）方法设置一个参数，输入的选择3局还是5局在方法里进行区别处理