这段代码有何错误！！请进……

Question

import java.net.*;
import java.sql.*;
import java.lang.*;/**
* Title:        Five Chess
* Description:
* Copyright:    Copyright (c) 2001
* Company:      neusoft
* @author xuguoping
* @version 1.0
*/public class jdbc_connect
{  public static void main(String argv[])
  {
  if(argv.length==0)
      {
      System.err.println("Usage:");
      System.err.println("");
      System.err.println("java jdbc_connect URL");
      System.exit(1);      }
    else{
          System.out.println("Error!!");
          }    try{
        Class.forName("textFileDriver");
        Class.forName("jdbc.odbc.JdbcOdbcDriver");
        Class.forName("imaginary.sql.iMsqDriver");        String myurl=argv[0]; //<-----------delete new 
        String user,pwd;        if(argv.length>1)
            {
            user=argv[1];
            }
        else
            {
            user="";
            }
          if(argv.length>2)
            {
            pwd=argv[2];
            }
          else
            {
            pwd="";
            }      Connection con=DriverManager.getConnection(myurl,user,pwd);
      con.close();
      System.out.println("Connection successful!");
            }
            catch(Exception e)
            {
            System.out.println(e.getMessage());
            e.printStackTrace();
            }
        }}