ServerSocket可以在从客户端读取之前写入客户端吗？

Question

After a ServerSocket accepts a connection to a client, can the ServerSocket start writing data to the client before the client sends a message? When I try to write to the client from the ServerSocket first, the client is blocking forever tyring to read it. However, if have the client send a message to the server first, the I/O streams between them work OK.

Answer 1

The ServerSocket can neither read nor write, but the accepted Socket can do both, in either order, or simultaneously.

Probably you are reading lines but not sending lines, or else not flushing a buffered output stream or writer.

Answer 2

Yes, you are correct that I meant getting the Socket from the accept() method.

My problem was very simple. The client was doing a readLine() method call but the server was not sending the "\\n" character.