java - 在 Java 中写入 DataOutputStream 变量错误

Question

我目前有以下 HTTP 客户端。每次我尝试向服务器发送第二个请求时，都会出现以下错误：

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: printStackTrace
    at clientpersistent.ClientPersistent.main(ClientPersistent.java:84)
Java Result: 1 

这是客户端代码：

Socket ClientSocket = new Socket(ClientHostName,1991);

            /*We simply open the input and output buffers for our connect
             * We do this so that we can read and write to the connection between our client and server
             */
            BufferedReader InputClient = new BufferedReader(new InputStreamReader(ClientSocket.getInputStream()));
            DataOutputStream OutputClient =new DataOutputStream(ClientSocket.getOutputStream());

            OutputClient.writeBytes("GET /my.html HTTP/1.0\r\n");
            OutputClient.writeBytes("Host: localhost:1991\r\n");
            OutputClient.writeBytes("Connection: Keep-Alive\r\n");
            OutputClient.writeBytes("Cache-Control: max-age=0\r\n");
            OutputClient.writeBytes("Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n");
            OutputClient.writeBytes("User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36\r\n");
            OutputClient.writeBytes("Accept-Encoding: gzip,deflate,sdch\r\n");
            OutputClient.writeBytes("Accept-Language: en-US,en;q=0.8\r\n");
            OutputClient.writeBytes("\r\n");

            /*Here we are simply displaying to the screen the response from the server for the flie we asked for*/
            String s;
            while ((s = InputClient. readLine()) != null) 
            {
                System.out.println(s);
            }

             Thread.sleep(1000);

            //ERROR HAPPENS HERE!!
            OutputClient.writeBytes("GET /download.jpg HTTP/1.0\r\n");
            OutputClient.writeBytes("Host: localhost:1991\r\n");
            OutputClient.writeBytes("Connection: Keep-Alive\r\n");
            OutputClient.writeBytes("Cache-Control: max-age=0\r\n");
            OutputClient.writeBytes("Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n");
            OutputClient.writeBytes("User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36\r\n");
            OutputClient.writeBytes("Accept-Encoding: gzip,deflate,sdch\r\n");
            OutputClient.writeBytes("Accept-Language: en-US,en;q=0.8\r\n");
            OutputClient.writeBytes("\r\n");
            while ((s = InputClient.readLine()) != null) 
            {
                System.out.println(s);
            }

            //Here we close the the read and write buffers and the socket connection
            OutputClient.close();
            InputClient.close();
            ClientSocket.close();