Threaded broadcast server showing the use of shared data to maintain a list of clients

broadcasterWithList.java

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


class SynchList
{
	ArrayList <OutputStream> it;
	SynchList()
	{
		it=new ArrayList <OutputStream> ();
	}

	synchronized OutputStream get(int i)
	{
	  return it.get(i);
	}

	synchronized void add(OutputStream o)
	{
		it.add(o);
	}

	synchronized int size()
	{
		return it.size();
	}
}

class broadcasterWithList
{
  static SynchList Outputs = new SynchList();
  static int i=0;

  public static void main(String[] argv) throws Exception
  {
    ServerSocket s = new ServerSocket(5000);
    Transaction k;
    while (true)  {
      k = new Transaction(i,s.accept(),Outputs);
      k.start();
      i++;
      System.out.println("client joined");}//wait for client to connect
   }
}   
 
class Transaction extends Thread
{
 SynchList outputs;
 InputStream b;
 OutputStream p;

  public Transaction(int i,Socket s, SynchList v) throws Exception
  {
    outputs=v;
    b = s.getInputStream();
    p = s.getOutputStream();
    outputs.add(p);
  }
 
  @Override
  public void run() 
  {
    int c;
    try {
      while((c=b.read())!=-1) 
      {
      	for (int j=0;j<outputs.size();j++)
       	{
	       //if (j!=n) 
	          {
			        (outputs.get(j)).write(c);
       			  (outputs.get(j)).flush();
		        }
        }
        System.out.print((char)c);
         
      }
      System.out.print("left loop");
    } 
    catch (Exception e)
    { 
      System.out.print(e);
    }   
  }
 
}