public DatabaseConnectionDialog(Frame parentFrame,String url, String uname) { super(parentFrame,"Database Connection Parameters",true); DbConnectionDialog(url, uname);
public DatabaseConnectionDialog(Frame parentFrame) { this(parentFrame, "", "");
  public DatabaseConnectionDialog(Frame parentFrame,String url, String uname) {    super(parentFrame,"Database Connection Parameters",true);    DbConnectionDialog(url, uname);  }