Client Chat With Threading

ClientV2.java

import java.net.*;
import java.io.*;
public class Client implements Runnable {
	public boolean b=true;

	Socket s;
	DataInputStream  din ;
	DataOutputStream dout;
	BufferedReader br;
	String str,str2;
	Thread t1,t2;

	public  Client() throws UnknownHostException, IOException
	{
		s=new Socket("localhost",8088);

		din=new DataInputStream(s.getInputStream());
		dout=new DataOutputStream(s.getOutputStream());

		br=new BufferedReader(new InputStreamReader(System.in));

		str="";str2="";
		t1=new Thread(this,"t1");
		t2=new Thread(this,"t2");
		t1.start();t2.start();
	}
	public static void main(String[] args)  throws Exception {


		new Client();

	}
	public void run(){
		if(Thread.currentThread().getName().equals("t1"))
		{
			while(b)
			{try
			{
				str=din.readUTF();
			}
			catch(Exception e)
			{
				System.out.println("Error");
			}
			if(str.equals("end"))
			{
				b=false;
				t1.stop();t2.stop();
			}
			System.out.println("Server:"+str);
			}
		}
		else if(Thread.currentThread().getName().equals("t2"))
		{
			while(b)
			{
				try
				{
					str2=br.readLine();  
					dout.writeUTF(str2);  
					dout.flush();
				}
				catch(Exception e)
				{
					System.out.println("Error");
				}
			}
		}


	}
}