String Concatenation in Java using TCP

import java.io.*;
import java.net.*;

public class ChatClient
{
public static void main(String[] args) throws Exception
{
String Message;
int port=Integer.parseInt(args[1]);
String hostname=args[0];
while(true)
{     
Socket client=new Socket(hostname,port);

OutputStream out=client.getOutputStream();
DataOutputStream outt=new DataOutputStream(out); 
System.out.println("Enter String 1");
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
Message=in.readLine();
System.out.println("Enter String 2");
String Message2=in.readLine();
outt.writeUTF(Message);
outt.writeUTF(Message2);
InputStream inn=client.getInputStream(); 
DataInputStream ins=new DataInputStream(inn);
System.out.println(ins.readUTF());
client.close();
}

}
}
        

import java.io.*;
import java.net.*;

public class ChatServer extends Thread
{
String ServerName,Message;
private ServerSocket server;
public ChatServer(int port) throws Exception
{
server=new ServerSocket(port);
server.setSoTimeout(0);
}

public void run()
{
while(true)
{
try
{
Socket conn = server.accept();

DataInputStream in = new DataInputStream(conn.getInputStream());
String news=in.readUTF();

String news1=in.readUTF();

DataOutputStream out=new DataOutputStream(conn.getOutputStream());
out.writeUTF(news+news1);
conn.close();
}
catch(Exception e){e.printStackTrace();}

}
}

public static void main(String[] args) throws Exception
{
int port=Integer.parseInt(args[0]);
Thread t=new ChatServer(port);
t.start();
}}