import java.sql.*;
public class Waheed {
    public Waheed() {
    }
     public static void main (String args [])
  {
   String s = "9 23 45.4 56.7";

      System.out.println ("going for connection");
       // DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
        
      try{ 
      Class.forName("oracle.jdbc.driver.OracleDriver");
       Connection conn = 

DriverManager.getConnection("jdbc:oracle:thin:@fahim:1521:aamir","muhammad","mfa786");
        Statement stmt = conn.createStatement();
        ResultSet rset = stmt.executeQuery("select accid from accbal");
         System.out.println ("going for connection");
        while (rset.next())

            s= rset.getString("accid");  this line give me error

            System.out.println (rset.getString("accid"));
         System.out.println (s);
      }
      catch(Exception e){
          e.printStackTrace();
      }
  }
}

s= rset.getString("accid");