simple socket program not working right

[anuj khanna]

//client side
import java.io.*;
import java.net.*;
class clientsoc1{
            public static void main(String args[])  throws Exception
            {
              InetAddress i=InetAddress.getLocalHost();
              String str=new String();
              String strt=new String();
              Socket soc=new Socket(i,4444);
              System.out.println(soc.getInetAddress());   
              BufferedReader is=new BufferedReader(new InputStreamReader(soc.getInputStream()));
              DataOutputStream os=new DataOutputStream(soc.getOutputStream());
              BufferedReader bs=new BufferedReader(new InputStreamReader(System.in));
              str=bs.readLine();
              int i1=str.length();
              System.out.println("Read:"+str);
              strt=is.readLine();
              System.out.println(strt);
              os.writeChars(str);
              os.flush();
              is.close();
              os.close();
             soc.close(); 
            }
             }
//server side
import java.net.*;
import java.io.*;
 class Serversoc1{
           public static void main(String args[])  throws Exception
         {
           String str1=new String();          
           ServerSocket scos=new ServerSocket(4444);           
           Socket soc1=scos.accept();
           System.out.println(soc1);
           BufferedReader br=new BufferedReader(new InputStreamReader(soc1.getInputStream()));
           BufferedWriter wr=new BufferedWriter(new OutputStreamWriter(soc1.getOutputStream()));
           System.out.println("on server now");
           str1= br.readLine();
           System.out.println(str1);// prints on the server side
           wr.write(str1);
           wr.flush();
           br.close();
           wr.close(); 
           soc1.close();
           }
}

whats wrong with this code.message is send to server and reaches there but it's not send back to the client.server hangs
if the clietn doesn't read the stream it works else it doesn't.tell the error in the code .try it out please.
I added the UBB tag CODE to allow easier reading
[This message has been edited by Carl Trusiak (edited January 27, 2001).]
[This message has been edited by Carl Trusiak (edited January 27, 2001).]

[Carl Trusiak]

Two things jump out.
strt=is.readLine();
System.out.println(strt);
os.writeChars(str);
You are trying to read the response from the Server Before you send the message! Change this to
os.writeChars(str);
strt=is.readLine();
System.out.println(strt);
And the message will be sent to the server. This is the first thing. The second
os.writeChars(str);
Doesn't send an end of line character. Using the streams you are using, you need to specifically send an end of line
os.writeChars(str);
os.write(10);
This will complete the communications. Once you see this, you may want to rethink the streams you are using to allow cleaner communications.

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Hope This Helps
Carl Trusiak