Thread: Very simple chat program hanging

This is the code. it seems to be a problem with the threads not the socket connection, when i run it it just uses all the cpu and hangs Help me please i`m loosing my mind over this coz i can`t really find something wrong with it and it is due tomorrow...

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
package chat;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
 
/**
 *
 * @author taghack
 */
class Read extends Thread
{
    BufferedReader in;
    public Read(BufferedReader in)
    {
        this.in=in;
    }
    @Override
    public void run()
    {
        try
        {
        while(true)
        {
        if(in.ready())
        {
        try
        {
        //byte[] tmparr=new byte[100000];
        //in.read(tmparr);
        System.out.println(in.readLine());
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        }
        }
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}
class Write extends Thread
{
    PrintWriter out;
    public Write(PrintWriter out)
    {
        this.out=out;
    }
    @Override
    public void run()
    {
        //byte[] tmparr=new byte[100000];
        while(true)
        {
        if(Main.consoleinput.hasNext())
        {
        try
        {
        String message;
        message=Main.consoleinput.next();
        out.println(message);
        out.flush();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        }
        }
    }
}
public class Main {
       public static String nickname;
       public static Scanner consoleinput=new Scanner(System.in);
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)  {
        try
        {
        // TODO code application logic here
        System.out.println("Please input your nickname:");
        nickname=consoleinput.nextLine();
        System.out.println("Please input the ip of the other participant in the chat session");
        String ip=consoleinput.nextLine();
        boolean surverisrunning=false;
        Socket mainsocket;
        int numberoftries=0;
        do
        {
            try
            {
                numberoftries++;
                System.out.println("trying to connect "+numberoftries);
                Socket temp=new Socket(ip,3000);
                surverisrunning=true;
                temp.close();
            }
 
            catch(Exception e)
            {
                surverisrunning=false;
                e.printStackTrace();
            }
        }
        while(surverisrunning==false && numberoftries<10);
 
        if(surverisrunning)
        {
            mainsocket=new Socket(ip,3000);
            System.out.println("CONNECTION ESTABLISHED AS CLIENT!");
        }
        else
        {
            System.out.println("PleaseWainForConnctionFromClient");
            ServerSocket a=new ServerSocket(3000);
            mainsocket=a.accept();
            System.out.println("CONNECTION ESTABLISHED AS SERVER!");
            surverisrunning=true;
        }
        BufferedReader in=new BufferedReader(new InputStreamReader(mainsocket.getInputStream()));
        PrintWriter out=new PrintWriter(new OutputStreamWriter(mainsocket.getOutputStream()));
        Read read1=new Read(in);
        Write write1=new Write(out);
        read1.start();
        write1.start();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
 
}

Originally Posted by macko

Read the error messages....

The original poster did not mention this exception, and given you don't have the ip of the server you should not assume this is related to the problem at hand.

taghack, please wrap your code in the code tags (I edited your post for you). Second

Originally Posted by taghack

when i run it it just uses all the cpu and hangs

Hangs where? Add some println's in there to determine where it hangs to debug the flow of the code. We don't have a server to connect to, so if your program hangs beyond that point you need to give us more information, such as where it 'hangs', what the server sends, etc...