network class modified but there are still some errors

src/chatRoom/client/Network.java

@@ -7,15 +7,18 @@ import java.util.Scanner;
 
 public class Network {
 
-    public static void main(String [] args) {
-        String serverName = args[0];
-        int port = Integer.parseInt(args[1]);
-        try(Socket client = new Socket(serverName, port);
+    private static final int port = 4321;
+    private static final String host = "127.0.0.1" ;
+
+    Scanner socketin;
+    Formatter socketOut;
+
+    public Network() throws IOException{
+
+        try(Socket client = new Socket( host, port);
             Scanner socketin = new Scanner(client.getInputStream());
             Formatter socketOut = new Formatter(client.getOutputStream());)
         {
-            String text;
-            socketOut.format(text);
             socketOut.flush();
         } catch (UnknownHostException e) {
             e.printStackTrace();
@@ -23,4 +26,11 @@ public class Network {
             e.printStackTrace();
         }
     }
+
+    public void sendMessage(String text){
+
+        socketOut.format(text);
+        socketOut.flush();
+
+    }
 }

src/chatRoom/client/view/MessageArea.java

 package chatRoom.client.view;
+import chatRoom.client.Network;
+
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.io.IOException;
 
 public class MessageArea extends JPanel {
     JTextField textField;
     JButton btn;
     ChatRoomGUI chatRoomGUI;
+    Network network;
 
 
     public MessageArea(ChatRoomGUI chatRoomGUI){
@@ -25,6 +29,13 @@ public class MessageArea extends JPanel {
                 doClickAction();
             } });
         add(btn, BorderLayout.EAST);
+
+        try {
+            network = new Network();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
         this.setVisible(true);
     }
     void reset() {
@@ -35,6 +46,7 @@ public class MessageArea extends JPanel {
     void doClickAction(){
 
       chatRoomGUI.addNewMessage(textField.getText());
+      network.sendMessage(textField.getText());
       reset();
     }
 }

src/chatRoom/server/ClientHandler.java

@@ -3,20 +3,30 @@ import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.net.Socket;
+import java.util.Formatter;
+import java.util.Scanner;
 
 public class ClientHandler {
     private Socket socket;
-    private DataOutputStream dataOutputStream;
-    private DataInputStream dataInputStream;
+//    private DataOutputStream dataOutputStream;
+//    private DataInputStream dataInputStream;
+    Scanner in;
+    Formatter out;
+
+
     public ClientHandler(Socket client) throws Exception {
         if (client == null)
             throw new Exception("client can't be null");
         this.socket = client;
-        dataOutputStream = new DataOutputStream(client.getOutputStream());
-        dataInputStream = new DataInputStream(client.getInputStream());
-        run();
+//        dataOutputStream = new DataOutputStream(client.getOutputStream());
+//        dataInputStream = new DataInputStream(client.getInputStream());
+        try(Scanner in = new Scanner(client.getInputStream());
+            Formatter out = new Formatter(client.getOutputStream());){
+            run();
+        }
 
     }
+
     private void handleIncomingMessages(String message){
         System.out.println(message);
 
@@ -24,13 +34,8 @@ public class ClientHandler {
 
         public void run() {
             while(true){
-                try {
-                    String input = dataInputStream.readUTF();
-                    handleIncomingMessages(input);
-                }
-                catch (IOException e) {
-                    e.printStackTrace();
-                }
+                String input = in.next() ;
+                handleIncomingMessages(input);
             }
         }
     }
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