Se connecter a une base de donnees

package essai;
import java.sql.*; 

public class connecter {
    Connection con ;
    public connecter() {
    try {
       Class.forName("com.mysql.jdbc.Driver");
    } catch (ClassNotFoundException e) {System.err.println (e) ;}
    try {
    con=DriverManager.getConnection("jdbc:mysql://localhost:3306/essai","root","fatou99");
    } catch (SQLException e) {System.err.println(e) ;}
    }
    Connection obtenirconnexion () {return con ;}
    //void Close() { try{con.close();}catch(Exception e){e.printStackTrace();} }
}

package essai;

import java.sql.*;
import javax.swing.table.DefaultTableModel;



public class incident extends javax.swing.JDialog {
    connecter conn= new connecter (); 
    Statement stm ;
    DefaultTableModel model= new DefaultTableModel ();

  
    public incident(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
        model.addColumn("nom_dep");
      try { 

      stm= conn.obtenirconnexion().createStatement();
       ResultSet Rs= stm.executeQuery("SELECT nom FROM depart");
       Object a []={Rs.getString("nom")};
       model.addRow(a);
     
      }
      catch (Exception e) {System.err.println(e);}
          
      tble.setModel(model);   
    
    }