Connection code of online exam system

To connect with database first install the xampp then create the database and table according to me.

Code of connection with database.

public class Connect {
Connection con = null;

public static Connection dbConnect(){
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost/exam", "root","");
return con;
}catch(Exception e){
JOptionPane.showMessageDialog(null, e);
return null;
}
}

}