---common task

    public static String selectFromDropDownByIndex_noButton_webElementList_multiRandomSelect(WebDriver driver, List<WebElement> dropDownListElementList, String dropDownName, Integer nrOfMultiSelectItems) {
        String selectedNames = "DefaultValue";
        Map<Integer, String> selectedNamesMap = new HashMap<>();

        Actions keyActionsAndClick = new Actions(driver);
        try {
            Waiting.elementsToBeVisible(driver, dropDownListElementList, dropDownName);
            keyActionsAndClick.keyDown(Keys.CONTROL);

            for (int i = 0; i < nrOfMultiSelectItems; i++) {

                int randomNumber = ThreadLocalRandom.current().nextInt(1, dropDownListElementList.size());
                WebElement selectedWebElement = dropDownListElementList.get(randomNumber);
                if (!selectedWebElement.isSelected()) {
                    String selectedName = selectedWebElement.getText();
                    Log4Test.info("- select element \"" + selectedName + "\" from drop down list " + dropDownName);
                    selectedNamesMap.put(randomNumber, selectedName);
                    keyActionsAndClick.click(selectedWebElement);
                }
            }

            keyActionsAndClick.keyUp(Keys.CONTROL).build().perform();
            selectedNames = selectedNamesMap.values().toString().replace("[", "").replace("]", "");

        } catch (NoSuchElementException e) {
            Assert.fail(Log4Test.error("List element not found: " + dropDownName));
        }
        return selectedNames;
    }

    public static String getTExtFromDropDownMultipleSelectedList(WebDriver driver, List<WebElement> dropDownListElementList, String dropDownName) {
        String selectedNames = "DefaultValue";
        Map<Integer, String> selectedNamesMap = new HashMap<>();
        try {
            int i = 0;
            Waiting.elementsToBeVisible(driver, dropDownListElementList, dropDownName);
            for (WebElement dropDownListElement : dropDownListElementList) {
                selectedNamesMap.put(i, dropDownListElement.getText());
                i++;
            }
            selectedNames = selectedNamesMap.values().toString().replace("[", "").replace("]", "");
        } catch (NoSuchElementException e) {
            Assert.fail(Log4Test.error("List element not found: " + dropDownName));
        }
        return selectedNames;
    }

--- page object

    public String randomSelectedStates = "defaultValue";
    public String selectedStates = "defaultValue";

    public String selectState_random_number(Integer nrOfMultiSelectItems) {
        CommonTask.clickElement(driver, multiSelectStateLisButton, "State search box");
        String randomSelectedStatesUnSorted = CommonTask.selectFromDropDownByIndex_noButton_webElementList_multiRandomSelect(driver, searchDefaultResults, "State search box", nrOfMultiSelectItems);
        CommonTask.clickElement(driver, multiSelectStateLisButton, "State search box");
        ArrayList<String> stateUnsortedList = new ArrayList<>(Arrays.asList(randomSelectedStatesUnSorted.split(",")));
        stateUnsortedList.sort(Collator.getInstance());
        randomSelectedStates = stateUnsortedList.toString().replace("  ", " ").replace("]", "").replace("[ ", "");
        return randomSelectedStates;
    }

    public String getTextFromSelectedStates() {
        selectedStates = CommonTask.getTExtFromDropDownMultipleSelectedList(driver, selectedStatesLocator, "State search box").replace("×", "");
        return selectedStates;
    }

--- test

        jQueryDropDown_Page.selectState_random_number(3);
        jQueryDropDown_Page.getTextFromSelectedStates();
        Assert.assertEquals(jQueryDropDown_Page.randomSelectedStates, jQueryDropDown_Page.selectedStates);