basic java client and server

cte-serv/cliente.java

+import java.io.*; 
+import java.net.*; 
+class TCPClient { 
+
+    public static void main(String argv[]) throws Exception 
+    { 
+        String sentence; 
+        String modifiedSentence; 
+
+        BufferedReader inFromUser = 
+          new BufferedReader(new InputStreamReader(System.in)); 
+
+        Socket clientSocket = new Socket("192.168.1.21", 5555); 
+
+        DataOutputStream outToServer = 
+          new DataOutputStream(clientSocket.getOutputStream()); 
+	        BufferedReader inFromServer = 
+          new BufferedReader(new
+          InputStreamReader(clientSocket.getInputStream())); 
+
+        sentence = inFromUser.readLine(); 
+
+        outToServer.writeBytes(sentence + '\n'); 
+
+        modifiedSentence = inFromServer.readLine(); 
+
+        System.out.println("FROM SERVER: " + modifiedSentence); 
+
+        clientSocket.close(); 
+                   
+    } 
+} 

cte-serv/server.java

+import java.io.*; 
+import java.net.*; 
+
+class TCPServer { 
+
+  public static void main(String argv[]) throws Exception 
+    { 
+      String clientSentence; 
+      String capitalizedSentence; 
+
+      ServerSocket welcomeSocket = new ServerSocket(5555); 
+    
+      Socket connectionSocket = welcomeSocket.accept(); 
+
+      BufferedReader inFromClient = 
+       new BufferedReader(new InputStreamReader(connectionSocket.getInputStream())); 
+
+      DataOutputStream  outToClient = 
+       new DataOutputStream(connectionSocket.getOutputStream()); 
+
+      while(true) { 
+
+           clientSentence = inFromClient.readLine(); 
+
+           //capitalizedSentence = clientSentence.toUpperCase() + '\n'; 
+           //outToClient.writeBytes(capitalizedSentence); 
+
+           System.out.println(clientSentence);
+        } 
+    } 
+} 
+