final/BindPort.java

import java.net.ServerSocket;
import java.net.Socket;

public class BindPort {
    public static void main(String[] args) {
        try {
            // 尝试绑定到端口8081
            ServerSocket serverSocket = new ServerSocket(8081);
            System.out.println("Successfully bound to port 8081");
            
            // 等待客户端连接
            System.out.println("Waiting for client connections...");
            Socket clientSocket = serverSocket.accept();
            System.out.println("Client connected: " + clientSocket.getRemoteSocketAddress());
            
            // 关闭连接
            clientSocket.close();
            serverSocket.close();
        } catch (Exception e) {
            System.err.println("Error binding to port 8081: " + e.getMessage());
            e.printStackTrace();
        }
    }
}