客户端与服务器玩猜数字游戏java

好的，这里给你提供一个简单的客户端-服务器猜数字游戏的Java实现。首先，我们需要定义一些常量和变量来表示游戏的状态和数据：

public class GuessingGame {
  private static final int MIN_VALUE = 1;
  private static final int MAX_VALUE = 100;
  private static final int MAX_TRIES = 5;
  
  private int secretNumber;
  private int triesLeft;
  
  public GuessingGame() {
    secretNumber = (int) (Math.random() * (MAX_VALUE - MIN_VALUE + 1)) + MIN_VALUE;
    triesLeft = MAX_TRIES;
  }
  
  public String guess(int number) {
    triesLeft--;
    if (number == secretNumber) {
      return "Congratulations! You guessed the secret number!";
    } else if (number < secretNumber) {
      return "The secret number is higher than your guess. Tries left: " + triesLeft;
    } else {
      return "The secret number is lower than your guess. Tries left: " + triesLeft;
    }
  }
  
  public boolean isGameOver() {
    return triesLeft == 0;
  }
}

这个类包含了一个猜数字游戏的逻辑，它可以返回玩家每次猜测的结果，以及判断游戏是否结束。现在，我们需要实现客户端和服务器的代码。

客户端：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class GuessingGameClient {
  public static void main(String[] args) {
    try {
      Socket socket = new Socket("localhost", 5000);
      
      BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
      PrintWriter output = new PrintWriter(socket.getOutputStream(), true);
      
      BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
      
      String message;
      do {
        message = input.readLine();
        System.out.println(message);
        if (!message.startsWith("Congratulations")) {
          String guess = keyboard.readLine();
          output.println(guess);
        }
      } while (!message.startsWith("Congratulations") && !message.startsWith("Sorry"));
      
      socket.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}

这个客户端代码首先建立了一个连接到服务器的Socket，然后创建了一个输入流和一个输出流。它不断地读取服务器发送的消息，并且如果消息不是“Congratulations”或“Sorry”，就从命令行读取玩家的猜测，并且发送给服务器。

服务器：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class GuessingGameServer {
  public static void main(String[] args) {
    try {
      ServerSocket serverSocket = new ServerSocket(5000);
      
      System.out.println("Waiting for clients...");
      Socket clientSocket = serverSocket.accept();
      
      System.out.println("Client connected: " + clientSocket.getInetAddress().getHostAddress());
      
      BufferedReader input = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
      PrintWriter output = new PrintWriter(clientSocket.getOutputStream(), true);
      
      GuessingGame game = new GuessingGame();
      
      output.println("Welcome to the guessing game! I'm thinking of a number between " + GuessingGame.MIN_VALUE + " and " + GuessingGame.MAX_VALUE + ".");
      
      String guess;
      do {
        guess = input.readLine();
        int number = Integer.parseInt(guess);
        String result = game.guess(number);
        output.println(result);
      } while (!result.startsWith("Congratulations") && !result.startsWith("Sorry") && !game.isGameOver());
      
      if (game.isGameOver()) {
        output.println("Sorry! You ran out of tries. The secret number was " + game.secretNumber + ".");
      }
      
      clientSocket.close();
      serverSocket.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}

这个服务器代码首先等待客户端的连接，然后创建了一个输入流和一个输出流。它创建了一个GuessingGame实例，并且发送一个欢迎消息到客户端。然后它不断地读取客户端发送的猜测，调用GuessingGame的guess方法来获得猜测的结果，并且发送给客户端。如果游戏结束，则发送一个结束消息到客户端。

现在，你可以运行GuessingGameServer来启动服务器，然后运行多个GuessingGameClient来连接到服务器并且玩游戏了。