Here is my Code:

import java.sql.*;

public class dbcon {

 Connection con;
 Statement st;
 ResultSet rs;
 dbcon() {
  try {
   Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
   Connection con = DriverManager.getConnection("jdbc:ucanaccess://E:\\code\\db5.mdb");

  } catch (Exception e) {
   System.out.println("hihihhaha 1");
   System.out.println(e);
  }
 }
 public String check(String u, String p) {
  String s = null;


  try {
   System.out.println("hihihhaha");
   st = con.createStatement();
   rs = st.executeQuery("select * from login where user='" + u + "' and pass='" + p + "' ");

   if (rs.next())

   {
    s = "ok";
   } else {
    s = "notok";
   }
  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }

 public String check_key(String u, String key) {
  String s = null;


  try {

   st = con.createStatement();
   rs = st.executeQuery("select * from login where user='" + u + "' and s_code='" + key + "' ");

   if (rs.next())

   {
    s = "ok";
   } else {
    s = "notok";
   }
  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }

 public String checkip(String ip) {
  String s = null;


  try {


   st = con.createStatement();
   rs = st.executeQuery("select * from ADDRESS where ipaddress='" + ip + "' ");

   if (rs.next())

   {
    s = "ok";
   } else {
    s = "notok";
   }
  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }

 public String checkfileoption(String option1) {
  String s = null;


  try {


   st = con.createStatement();
   rs = st.executeQuery("select * from RESOURCES where files='" + option1 + "' ");

   if (rs.next())

   {
    s = rs.getString(3);
   }
  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }

 public String listfile(String clientIp) {
  String s = "";


  try {

   //select distinct username from userinfo
   st = con.createStatement();
   rs = st.executeQuery("select distinct files from RESOURCES where allowedip='" + clientIp + "' ");

   while (rs.next())

   {
    s = s + rs.getString(1) + ";";
   }

  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }
 public String listfile() {
  String s = "";


  try {


   st = con.createStatement();
   rs = st.executeQuery("SELECT distinct files FROM  RESOURCES");

   while (rs.next())

   {
    s = s + rs.getString(1) + ";";
   }

  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }
 public String listip() {
  String s = "";


  try {


   st = con.createStatement();
   rs = st.executeQuery("select * from ADDRESS ");

   while (rs.next())

   {
    s = s + rs.getString(1) + ";";
   }

  } catch (Exception e) {
   System.out.println(e);
  }

  return s;
 }

 public String getfake(String fil) {
  String s = null;


  try {


   st = con.createStatement();
   rs = st.executeQuery("select * from RESOURCES where files='" + fil + "'");

   if (rs.next())

   {
    s = rs.getString(2);
   }

  } catch (Exception e) {
   System.out.println(e);
  }
  System.out.println(s);
  return s;
 }

 public void removede(String data, String table1, String wh) {


  try {


   st = con.createStatement();

   String sql = "delete  from " + table1 + " where " + wh + "='" + data + "'";
   System.out.println(sql);

   st.executeUpdate(sql);
   st.executeUpdate(sql);
  } catch (Exception e) {
   System.out.println(e);
  }
  System.out.println("deleted");

 }

 public void add_ip(String s) {

  try {


   st = con.createStatement();

   String sql = "insert into ADDRESS values('" + s + "')";
   System.out.println(sql);

   st.executeUpdate(sql);
   //st.executeUpdate(sql);
  } catch (Exception e) {
   System.out.println(e);
  }
  System.out.println("added");

 }

 public void add_res(String f, String ff, String op, String allowedip) {

  try {
   st = con.createStatement();

   String sql = "insert into RESOURCES values('" + f + "','" + ff + "','" + op + "','" + allowedip + "')";
   System.out.println(sql);

   st.executeUpdate(sql);
   //st.executeUpdate(sql);
  } catch (Exception e) {
   System.out.println(e);
  }
  System.out.println("added");

 }

 public void add_user(String user, String pass, String code, int age, String gender, String phone, String address, String mobile) {

  try {


   st = con.createStatement();

   String sql = "insert into LOGIN values('" + user + "','" + pass + "','" + code + "'," + age + ",'" + gender + "','" + phone + "','" + address + "','" + mobile + "')";
   System.out.println(sql);

   st.executeUpdate(sql);
   //st.executeUpdate(sql);
  } catch (Exception e) {
   System.out.println(e);
  }
  System.out.println("added");

 }


 public static void main(String arg[]) {
  dbcon ob = new dbcon();
  /*System.out.println(ob.check("a","a"));
  System.out.println(ob.checkip("127.0.0.1"));
  System.out.println(ob.listfile());
  System.out.println(ob.getfake("Login.java"));
  ob.removede("dsds","ADDRESS","IPADDRESS");
  */
  //ob.add_ip("aasd");
  //ob.add_res("aasd","sss","ddd");
  //ob.add_user("a","a","a","w","s","d");
  System.out.println(ob.checkfileoption("Login.java"));
 }


}