Return statement

import java.sql.*;
public class BDR
{
  Connection con;
    
  public BDR()
  {
    try{
       Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
       }catch(ClassNotFoundException ex){System.out.println("Driver nao encontrdo");}
   }

  public void conectar()
  {
   try{
        con = DriverManager.getConnection("jdbc:odbc:banco","","");
      }catch(SQLException ex){System.out.println("Problemas na conexao");}
  } 

 public ResultSet executarQry(String sql)
  { 
     try
       { 
          Statement st = con.createStatement();  
          ResultSet rs = st.executeQuery(sql);
          return rs;
        }catch(Exception e){e.printStackTrace();}
  }
    public void desconctar()
      {
        con.close();
      }
}