相关疑难解决方法(0)

当我尝试设置套接字服务器时,我收到一条错误消息:

Exception in thread "main" java.net.BindException: Cannot assign requested address: JVM_Bind
    at java.net.PlainSocketImpl.socketBind(Native Method)
    at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:383)
    at java.net.ServerSocket.bind(ServerSocket.java:328)
    at java.net.ServerSocket.<init>(ServerSocket.java:194)
    at java.net.ServerSocket.<init>(ServerSocket.java:106)
    at socketyserver.SocketyServer.main(SocketyServer.java:12)
Java Result: 1

整个代码最简单,因为它可以是:

public static void main(String[] args) throws UnknownHostException, IOException
{
    ServerSocket serverSocket;
    serverSocket = new ServerSocket(9999);
}

我100%确定我的端口已转发,Windows防火墙已关闭.什么都没有阻止端口9999.还有什么可能出错？