java 枚举排序

我使用java枚举来定义如何使用按钮渲染模式窗口（Vaadin处理渲染）。我的问题是，当我运行gui时，我的按钮每次都以随机顺序出现。所以我的问题是，既然我使用枚举集来按住我的按钮，那会是无序的吗？将其放入有序列表的最佳方法是什么？

我的设置枚举

public enum MODAL_SETTINGS {
    NEW_MODAL_WINDOW("menu.context.new", "400", MODAL_BUTTON.SAVE, MODAL_BUTTON.CANCEL),
    EDIT_MODAL_WINDOW("menu.context.modify","400", MODAL_BUTTON.UPDATE, MODAL_BUTTON.CANCEL),
    DELETE_MODAL_WINDOW("menu.context.delete", "250", false, MODAL_BUTTON.DELETE, MODAL_BUTTON.CANCEL);

    private EnumSet<MODAL_BUTTON> buttons;
    private String caption;
    private String width;
    private boolean isResizable = true;

    private MODAL_SETTINGS(String caption, String width, MODAL_BUTTON... buttons){
        this.setCaption(caption);
        this.setWidth(width);
        this.buttons = EnumSet.copyOf(Arrays.asList(buttons));
    }

    private MODAL_SETTINGS(String caption, String width, boolean isResizable, MODAL_BUTTON... buttons){
        this.setCaption(caption);
        this.setWidth(width);
        this.isResizable = isResizable;
        this.buttons = EnumSet.copyOf(Arrays.asList(buttons));
    }

    public EnumSet<MODAL_BUTTON> getButtons(){
        return buttons;
    }

    @Override
    public String toString(){
        String s = super.toString();
        s=s.replaceAll("_", ".");
        return s;
    }

    public void setCaption(String caption) {
        this.caption = caption;
    }

    public String getCaption() {
        return caption;
    }

    public void setWidth(String width) {
        this.width = width;
    }

    public String getWidth() {
        return width;
    }

    public boolean isResizable() {
        return isResizable;
    }
}

我的按钮枚举

public enum MODAL_BUTTON {
    SAVE, UPDATE, CANCEL, DELETE;
}