WebDriver Locators in selenium

First we have to know What is "By" ?

"By" class : By is static class in webdriver's API. It is used to locate elements with in the webpage. It has the following methods:

• id(java.lang.String id) : Searches for an element having the specified value of the "id".

  driver.findElement(By.id("id attribute"))...

• name(java.lang.String name) : Finds element based on the value of the "name" .

  driver.findElement(By.name("name attribute"))...

• cssSelector(java.lang.String selector) : Find element (or) elements based on the value of the "cssSelector" attribute.

  List<WebElement> cssSelector = driver.findElements( By.cssSelector("input[class='***']");

• tagName(java.lang.String name) : It Finds based on the "TagName".

  List<WebElement> TagName = driver.findElements( By.cssSelector("href");

• className(java.lang.String className) : Finds based on the "className".

   driver.findElement(By.className("className attribute"))...

• linkText(java.lang.String linkText) : Finds based on the "linkText".

  driver.findElement(By.linkText("linkText attribute"))...

• partialLinkText(java.lang.String linkText) : Finds based on the "partialLintText".

  driver.findElement(By.partialLinkText("privacy"))...

• xpath(java.lang.String xpathExpression) : Finds based on the "xpath".

  driver.findElement(By.xpath(".//*[@id='***']"))...