Is the coding style following good practice

I have a utility class where I have saved the objects and other and the java classes calls this object. All the variables and methods are static here. I want to know whether it is a good practice or not. And are there any security threats to my application or not.

public class ObjectHolderUtil {
/**
* Object of the main stage of the application
*/
public static Stage mainStage;
public static HibernateSession hibernateSession;
public static String dashboard="/fxml/Dashboard.fxml"; //dashboard fxml file
public static String mainScreen="/fxml/MainScreen.fxml";
public static String addBill="/fxml/AddBill.fxml";
public static StackPane mainStackPane;
public static User user;

public static Helper helper;

  public static String getMainScreen() {
    return mainScreen;
  }

  public static void setMainScreen(String mainScreen) {
    ObjectHolderUtil.mainScreen = mainScreen;
  }

  public static Helper getHelper() {
    return helper;
  }

  public static void setHelper(Helper helper) {
    ObjectHolderUtil.helper = helper;
  }

  public static User getUser() {
    return user;
  }

  public static void setUser(User user) {
    ObjectHolderUtil.user = user;
  }

 public static StackPane getMainStackPane() {
    return mainStackPane;
  }

  public static void setMainStackPane(StackPane mainStackPane) {
    ObjectHolderUtil.mainStackPane = mainStackPane;

  }

  public static Stage getMainStage() {
    return mainStage;
  }

  public static void setMainStage(Stage mainStage) {
    ObjectHolderUtil.mainStage = mainStage;
  }

  public static String getDashboard() {
    return dashboard;
  }

  public static void setDashboard(String dashboard) {
    ObjectHolderUtil.dashboard = dashboard;
  }

  public static HibernateSession getHibernateSession() {
    return hibernateSession;
  }

  public static void setHibernateSession(HibernateSession hibernateSession) {
    ObjectHolderUtil.hibernateSession = hibernateSession;
  }
}