atualizando o cliente do código abaixo

package rect;

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


class TCPClient {
private static BufferedReader inFromUser;
private static String sentence;
private static String modifiedSentence;
private static Socket clientSocket;
private static String host;
private static int porta;
private static DataOutputStream outToServer;
private static InputStreamReader inputStreamReader;
private static BufferedReader inFromServer ;
private static CharSequence strsair="tchau";
private static boolean sair=false;

public static void main(String argv[]) throws Exception
{
host="localhost";
porta=6789;
InputStream iunputSteam=System.in;
InputStreamReader inputStreamReadertcl;
OutputStream outputStreamcliente;
InputStream inputStreamclientSocket;

clientSocket = new Socket(host, porta);
for(int i=0; (i<4)&&(sair==false); i++)
{

inputStreamReadertcl=new InputStreamReader(iunputSteam);
inFromUser =new BufferedReader(inputStreamReadertcl);

outputStreamcliente=clientSocket.getOutputStream();
outToServer = new DataOutputStream( outputStreamcliente);
inputStreamclientSocket=clientSocket.getInputStream();
inputStreamReader=new InputStreamReader (inputStreamclientSocket);
inFromServer = new BufferedReader (inputStreamReader);
/*sentença digitada pelo cliente*/
sentence = inFromUser.readLine();
if(sentence.contains(strsair)==true)
sair=true;

outToServer.writeBytes(sentence + '\n');
modifiedSentence = inFromServer.readLine();
modifiedSentence="FROM SERVER: "+modifiedSentence+"\n sair ="+sair+"\n" ;
System.out.println(modifiedSentence);

}
System.out.println("desconectando servidor "+"clientSocket.toString()"+clientSocket.toString());

clientSocket.close();

}

public void testar(String argv[]) throws Exception
{

}
}