class Producer implements Runnable
{
  Q q;
  public Producer(Q q)
  {
    this.q=q;  
  }
  public void run()
  {
    int i=0;
    while(true)
    {
      if(i==0)
      {
        q.name="张三";
        try{Thread.sleep(1);}catch(Exception e){}
        q.sex="男";
      }
      else
      {
          q.name="李四";
          q.sex="女";
      }  
      i=(i+1)%2;
    }  
  }
}
class Consumer implements Runnable
{
   Q q;
   public Consumer(Q q)
   {
     this.q=q;  
   }
   public void run()
   {
     while(true)
     {
     System.out.print(q.name);
     System.out.println(":"+q.sex);
    }  
   }
}
class Q
{
  String name="unknown";
  String sex="unknown";
}
class ThreadCommunications
{
  public static void main(String [] args)
  {
   Q q=new Q();
   new Thread(new Producer(q)).start();
   new Thread(new Consumer(q)).start();
  }
}