TCP.rar_eclipse tcp_java Tcp

import java.io.*; import java.net.*; public class TCPServer { public static void main(String args[]){ ServerSocket serverSocket = null; try{ serverSocket = new ServerSocket(4000,10); } catch(IOException e){ System.out.println("Could not listen on port:"+4000+","+e); System.exit(1); } Socket clientSocket = null; try{ System.out.println("before accept\n"); clientSocket = serverSocket.accept(); System.out.println("after accept\n"); } catch(IOException e){ System.out.println("Accept failed:"+4000+","+e); System.exit(1); } try { BufferedReader is = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); PrintStream os = new PrintStream(new BufferedOutputStream(clientSocket.getOutputStream(), 1024), false); String inputLine,outputLine; while ((inputLine=is.readLine()) != null) { for (int i = 0; i < inputLine.length(); i++) os.write((byte) Character.toUpperCase(inputLine.charAt(i))); os.write((byte) '\n'); System.out.println(inputLine); os.flush(); } os.close(); is.close(); clientSocket.close(); serverSocket.close(); } catch (IOException e) { e.printStackTrace(); } } }