asynchronous communication instant messenger program......

I am in networking and did not expect to run into this, this is my code below. I must turn this instant messenger program into an asynchronous communication instant messenger program. What to do to make it to make it asychronous? Here is my code:

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

class server
{
public static void main(String[] args)
{
try {
Socket s = (new ServerSocket(2010)).accept();
BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
String str = br.readLine();
System.out.println(str);
(new DataOutputStream(s.getOutputStream())).writeBytes( str + "\n");
} catch (IOException e) {
System.out.println(e);
}
}
}






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

class client
{
public static void main(String[] args)
{
try {
Socket s = new Socket("localhost", 2010);
(new DataOutputStream(s.getOutputStream())).writeBytes( "Hello, World\n");
BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
System.out.println(br.readLine());
} catch (IOException e) {
System.out.println(e);
};
}
}

See the following link for a tutorial on the tools you need: Lesson: Concurrency (The Java™ Tutorials > Essential Classes)

Reposted with proper highlights and code tags.... O_o

Code java:

---

[CODE]
import java.io.*;
import java.net.*;
 
class server
{
 public static void main(String[] args)
 {
  try {
   Socket s = (new ServerSocket(2010)).accept();
   BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
   String str = br.readLine();
   System.out.println(str);
   (new DataOutputStream(s.getOutputStream())).writeBytes(str + "\n");
  } catch (IOException e) {
   System.out.println(e);
  }
 }
}
 
 
 
 
 
 
import java.io.*;
import java.net.*;
 
class client 
{
 public static void main(String[] args)
 {
  try {
   Socket s = new Socket("localhost", 2010);
   (new DataOutputStream(s.getOutputStream())).writeBytes("Hello, World\n");
   BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
   System.out.println(br.readLine());
  } catch (IOException e) {
   System.out.println(e);
  };
 }
}
[/CODE]

---

So what do you mean by asynchronous? You can't have one run without the other... Do you mean run them within the same program?

All that requires is multi-threading. Host code in the main method and client code goes in a Runnable object, executed by a new Thread.