问Java和Swing

EN

public class Main
{
   public static void main(String[] args)
   {
       ActList        a = new ActList(...);
       SocketManager sm = new SocketManager(...);

       a.sendMessageWithSocket(sm); //here you pass Main's reference to SocketManager 
   }                                //object to the ActLis class for use
} 

public class ActLis
{
    private SocketManager sm;

    public ActLis(SocketManager sm)
    {
        this.sm = sm;
    }
}

    public class Main
    {
        public static final Main instance = new Main(/*args*/);

        private Main(/*args*/)
        {
            //blah blah
        }
    }