Have a error in getting the values from database randomly

Question

Hi to all
I am new member to this community and new to java programming, i am the one of them who got benefited through this site , with that hope i am asking u to clear my doubt.
Actually i want to get the data from database randomly, i dont have problem either in database connection and generating random number,its working fine. but when i have to get the data from database with generated random no using absolute function , i am getting an exception
eg : rs.absolute(2);
i could not move to the second row of my result set.
not only absolute function whatever the function i am using except next method, getting exception.
my code :
package practical;
import java.util.*;
import java.sql.*;
public class gen {
     Connection con;
     Statement s;
     ResultSet rs;
     public void get(int t)
          try
               rs.absolute(t);
               String question=rs.getString("question");
               System.out.println("Random question : "+question);
          catch(Exception e)
               System.out.println("get error");
     public void ran()
          Random r=new Random();
               for(int i=0;i<10;i++)
                    int j=r.nextInt(10);
                    System.out.println("random value : "+j);
                    if(j!=0)
                         try
                              get(j);
                         catch(Exception e)
                              System.out.println("ran error");
     public void connect()
          try
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               con=DriverManager.getConnection("jdbc:odbc:ds","sa","server");
               s=con.createStatement();
               rs=s.executeQuery("select question from qa");
               ran();
               con.close();
          catch(Exception e)
               System.out.println("error");
     public static void main(String... strins)
          new gen().connect();
}

Answer 1

but i acheived through the code which is pasted below but i have to close the database connection for every iteration.
package practical;
import java.util.*;
import java.sql.*;
public class gen {
     Connection con;
     Statement s;
     ResultSet rs;
     public void get(int t)
          int c=0;
          while(c!=t)
               try
               rs.next();
               c++;
               catch(Exception e)
                    System.out.println("next error");
          if(c==t)
          {     try
                    String question=rs.getString("question");
                    System.out.println("Random question : "+question);
               catch(Exception e)
                    System.out.println("iteration error");
     public void ran()
          Random r=new Random();
               int j=r.nextInt(10);
               System.out.println("random value : "+j);
               if(j!=0)
                    try
                         get(j);
                    catch(Exception e)
                         System.out.println("ran error");
     public void connect()
          try
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               con=DriverManager.getConnection("jdbc:odbc:ds","sa","server");
               s=con.createStatement();
               rs=s.executeQuery("select question from qa");
               ran();
               con.close();
          catch(Exception e)
               System.out.println("error");
     public static void main(String... strins)
          for(int i=0;i<10;i++)
               new gen().connect();
}