Java:无法在套接字in.readLine()之后写入套接字

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

public class SocketExample {
    public static void main(String[] args) {
        try {
            // 创建套接字并连接到服务器
            Socket socket = new Socket("服务器地址", 端口号);

            // 从套接字中读取数据
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String data = in.readLine();
            System.out.println("接收到的数据：" + data);

            // 创建新的套接字对象并写入数据
            Socket writeSocket = new Socket("服务器地址", 端口号);
            PrintWriter out = new PrintWriter(writeSocket.getOutputStream(), true);
            out.println("要写入的数据");

            // 关闭套接字
            socket.close();
            writeSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}