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Webdriver can't find the element

Selenium cant find this xpath I tried every way I need to click last button Deactivate but I cant
I tried xpath,cssSelectors,
#When("^I click deactivate button$")
public void iClickDeactivateButton(){
WebElement deactivateBatchButton = driver.findElement(By.xpath("//BUTTON[#_ngcontent-c14=''][text()='Deactivate'][text()='Deactivate']/self::BUTTONclass='deactivate']"));
deactivateBatchButton.click();
}
I want to click this button and carry one rest of the tests.

As the desired element is a Angular element and to locate it you have to induce WebDriverWait and you can use either of the following solutions:
cssSelector:
WebElement deactivateBatchButton = new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.deactivate.xh-highlight")));
xpath:
WebElement deactivateBatchButton = new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath("//button[#class='deactivate xh-highlight' and text()='Deactivate']")));

You can carry on with the button name.
WebElement deactivateBatchButton = driver.findElement(By.xpath("//*[text()='Deactivate']"));
deactivateBatchButton.click();

Identifying which web form element is selected after pressing tab key via selenium web-driver java?

I am using the sendKeys(key,Keys.TAB) method to navigate through a form.
Actions action = new Actions(driver);
CharSequence key = null;
for(int i=0;i<42;i++)
{
action.sendKeys(key,Keys.TAB).build().perform();
}
At the end of every action(a tab key press) I want to know which form element is selected
I want to reach to the 42nd element of the form and cross check whether its the desired element and for that i need to retrieve some of its information.
I am new to selenium and I am not able to figure out a way to achieve this.

You can use WebDriver's TargetLocator class for this purpose.
WebElement currentElement = driver.switchTo().activeElement();
This will return you with current element it focussed currently. If no element is focussed it will return you the body element, which is the case when u launch your browser.
Internally it will be returning u the element returned by document.activeElement. So to verify u can always run as:
JavascriptExecutor js = (JavascriptExecutor) driver;
WebElement currentElement = (WebElement) js.executeScript("return document.activeElement");

selenium dynamically click li item

I am trying to dynamically search an "li" tag item and double-click on this website: www.jstree.com (the right-top hierarchy tree sample). The code does find the WebElement but does not do anything. I am trying as follows. Can someone please point to what I am doing wrong? I am using Firefox 35.0.1 and selenium 2.44.0.
driver.get(baseUrl + "http://www.jstree.com/");
WebElement we = driver.findElement(By.xpath("/html/body/div/div/div[1]/div[1]/div[2]/div[1]/ul/li[1]/ul"));
Actions action = new Actions(driver);
List<WebElement> liItems = we.findElements(By.tagName("li"));
for(WebElement liItem:liItems)
{
System.out.println(liItem.getText());
if(liItem.getText().startsWith("initially open"))
{
System.out.println("Found it...");
liItem.click();
action.moveToElement(liItem).doubleClick().build().perform();
break;
}
}

I ended up doing this:
Modified the selector to make sure ONLY the expected elements are returned. It helps a lot in terms of execution time and reducing the number of unwanted loopings. And, then find the element in run time and use Action() on that to perform double click. I also update the Selenium binding as #alecxe suggested to work with latest Firefox
public void DemoTest() throws InterruptedException {
List<WebElement> liItems = driver.findElements(By.xpath("//*[contains(text(),'initially open')]"));
for(WebElement liItem:liItems)
{
Actions actions = new Actions(driver);
actions.moveToElement(liItem).doubleClick().build().perform();
}
}

How to find an Element by index in selenium webdriver for java

Im trying to automate the Google Images page:
https://www.google.com/search?q=pluralsight&biw=1416&bih=685&source=lnms&tbm=isch&sa=X&ei=qGd6VN6bEZTooAT7q4C4BQ&sqi=2&ved=0CAgQ_AUoAw
All the images have the same class but no id and the results are constantly changing. So I would like to be able to click on the images based on their index.
I know how to do it in C#...but I cant figure out how to specify in the index in Java. When I try to select an index beyond 0, I get and IndexOutOfBounds error, but i cant figure out why
WebElement image = chromeDriver.findElement(By.className("rg_di"));
WebElement imageLink = image.findElements(By.tagName("a")).get(1);
imageLink.click();
Here is the entire code im using...any help would be appreciated:
System.setProperty("webdriver.chrome.driver", "/Users/user/chromedriver");
WebDriver chromeDriver = new ChromeDriver();
chromeDriver.get("http://www.google.com");
WebElement searchBox = chromeDriver.findElement(By.id("gbqfq"));
searchBox.sendKeys("pluralsight");
searchBox.sendKeys(Keys.RETURN);
chromeDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
WebElement imagesLink = chromeDriver.findElement(By.linkText("Images"));
imagesLink.click();
WebElement image = chromeDriver.findElement(By.className("rg_di"));
WebElement imageLink = image.findElements(By.tagName("a")).get(1);
imageLink.click();
Any help would be greatly appreciated

In your code:
WebElement image = chromeDriver.findElement(By.className("rg_di"));
will return the first element found on the page with a class of "rg_di".
That element has only one <a href=... /a> tag in it.
You are getting an IndexOutOfBounds exception because you are asking for the second one (zero based indexing). If you change your final WebElement to:
WebElement imageLink = image.findElements(By.tagName("a")).get(0);
The code should work for you with that small change.
This is my quick version (note the lack of storing elements I only need to do one thing with as WebElements):
public static void main(String[] args) {
// I don't have Chrome installed >.<
WebDriver driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get("http://www.google.com");
WebElement searchBox = driver.findElement(By.id("gbqfq"));
searchBox.sendKeys("pluralsight");
searchBox.sendKeys(Keys.RETURN);
driver.findElement(By.linkText("Images")).click();
WebElement image = driver.findElement(By.className("rg_di"));
image.findElements(By.tagName("a")).get(0).click();
// super-shortened version:
// driver.findElement(By.className("rg_di")).findElements(By.tagName("a")).get(0).click();
}

I'd do:
List<WebElement> we = chromeDriver.findElements(By.cssSelector(".your-class a"));
we.get(1) //should get first element in array

This code worked very well when we have similar object properties for same web buttons, then using
List<WebElement> we = webdriver.findElements(By.cssSelector(""));
and then getting
we.get(1).click();
Thank you so much for posting this answer.

Another solution may be like this:
If the class name and the index of the web element are known, then following code works:
driver.findElement(By.xpath("(//*[#class='android.widget.ImageView'])[18]")).click();

Is it possible to get By object having WebElement

I'm using #FindBy annotations to locate WebElements. But I want to use these WebElements in methods as parameters. I had success with this only if WebElement was found on page. But if I want to wait for it I must use By (with same locator) instead.
E.g.
private static final String SEARCHFIELD_LOC = "#search input[placeholder]";
#FindBy(css = SEARCHFIELD_LOC)
public WebElement searchField;
public By searchField_by = new By.ByCssSelector(SEARCHFIELD_LOC);
That way I can use this WebElement as By object in some method, like
public boolean isElementDisplayedWithWait(final By by) { .... }
So for each element I have 4 lines of code. I'm to lazy and searching for a way to simplify that.

I found totally another solution. I will store my locators as strings.
public String searchField = ".slide.slide_search input[placeholder]"
So only 1 line of code per locator. And I hope supporting only CSS locators will be enough. I will NOT use #FindBy for getting WebElements. Instead, I will get WebElements using special method that will wait for element and will log what's going on. I will implement getting WebElement like this:
WebElement we = wait.until(ExpectedConditions.visibilityOfElementLocated(new By.ByCssSelector(locator)));
where wait is
Wait<WebDriver> wait = new FluentWait<WebDriver>( driver )
.withTimeout(timeout, TimeUnit.SECONDS)
.pollingEvery(1, TimeUnit.SECONDS)
.ignoring( StaleElementReferenceException.class ) ;

The alternate of having wait/assertions/verification methods with webelement itself is available with extended webelement in QAF formerly ISFW. For example:
#FindBy(css = SEARCHFIELD_LOC)
public WebElement searchField;
searchField.waitForPresent();
searchField.assertPresent(); //auto wait
searchField.verifyPresent(); //auto wait
Reference:
QAF Selenium testing-frameworks
ISFW FAQ