code: public void trace(String urlStr) {
          System.out.println("\n================" + urlStr + "====================");
          System.out.println("	protocol = " + protocol_name[protocol]);
  
          if (host != null)
              System.out.println("	host name= " + host);
  
          //if (port>0)
          System.out.println("	port num = " + strPort);
          System.out.println("	device   = " + devname);
  
          if (use_db)
              System.out.println("	use database");
          else
              System.out.println("	Do NOT use database");
          System.out.println();
      }
docs: ===================================================================