What is the method to use Selenium and Java to click the download icon of a PDF that has been opened in a new tab?

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One possible method to use Selenium and Java to click the download icon of a PDF that has been opened in a new tab is:

1. Switch to the new tab using the window handles API:

String currentHandle = driver.getWindowHandle();
for (String handle : driver.getWindowHandles()) {
  if (!handle.equals(currentHandle)) {
    driver.switchTo().window(handle);
    break;
  }
}

1. Locate the download icon using a CSS selector or XPath expression, either by inspecting the page source or using a testing tool like Selenium IDE:

WebElement downloadIcon = driver.findElement(By.cssSelector("a[title='Download PDF']"));

1. Click the download icon using the click() method:

downloadIcon.click();

1. Optionally, wait for the PDF file to download using a custom timeout or a wait method like implicit or explicit waits:

WebDriverWait wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.visibilityOfElementLocated(By.tagName("body")));

Note that the exact details of the code will depend on the specific website and PDF viewer being used, and may require additional steps such as handling pop-up dialogs or specifying a download folder.