sendKeys() in Selenium web driver

Question

I am new to Selenium. I just want to send keys to a username text box and send a tab key both at a time so that text box can check for availability of username.

Answer 1

ListitemNames = wd.findElements(By.cssSelector("a strong")); 
System.out.println("No items in Catalog page: " + itemNames.size());
   for (WebElement itemName:itemNames)
    {  
       System.out.println(itemName.getText());
    }