基于socket的计算器java

以下是一个基于Socket的Java计算器示例：

服务端：

import java.io.*;
import java.net.*;

public class CalculatorServer {
    public static void main(String[] args) {
        try {
            ServerSocket server = new ServerSocket(1234);
            System.out.println("Server is running...");

            while (true) {
                Socket client = server.accept();
                System.out.println("Client connected");

                BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
                PrintWriter out = new PrintWriter(client.getOutputStream(), true);

                int result = 0;
                String input;
                while ((input = in.readLine()) != null) {
                    String[] tokens = input.split(" ");
                    int num1 = Integer.parseInt(tokens[0]);
                    int num2 = Integer.parseInt(tokens[2]);
                    String operator = tokens[1];

                    switch (operator) {
                        case "+":
                            result = num1 + num2;
                            break;
                        case "-":
                            result = num1 - num2;
                            break;
                        case "*":
                            result = num1 * num2;
                            break;
                        case "/":
                            result = num1 / num2;
                            break;
                    }
                    out.println(result);
                }

                client.close();
                System.out.println("Client disconnected");
            }
        }
        catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
    }
}

客户端：

import java.io.*;
import java.net.*;

public class CalculatorClient {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 1234);
            System.out.println("Connected to server");

            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
            BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

            String line;
            while ((line = input.readLine()) != null) {
                out.println(line);
                int result = Integer.parseInt(in.readLine());
                System.out.println("Result: " + result);
            }

            socket.close();
            System.out.println("Disconnected from server");
        }
        catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
    }
}

运行服务端和客户端之后，客户端可以输入表达式，并将其发送到服务器进行计算。服务器将计算结果发送回客户端，并在客户端上显示结果。