How to Switch frame in Selenium java

Question

I'm trying to switch frame to email body, but it's not working.

I'm not able to switch frames.

Expectation:

I need to open yopmail and get a text from second email. Email - Secondemail1234@yopmail.com
             

public Password() {
public static void main(String[] args)          System.setProperty("webdriver.chrome.driver","C:\\Browsers\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.findElement(By.xpath("//input[@class='ycptinput']")).sendKeys("Secondemail1234"); 
driver.findElement(By.xpath("//input[@type='submit']/..//i")).click();
int i = 0 ;
driver.switchTo().frame(i);
WebElement total= driver.findElement(By.xpath("(//div[@class='lms'])[2]"));
total.click();
driver.switchTo().frame(driver.findElement(By.xpath("//*[@id='ifmail']")));  //not working to switch to iframe
driver.switchTo().frame(1);  ///not working with index
driver.switchTo().frame("ifmail"); // not working 

here only I need to switch to frame -- to email body frame I need to switch.            

Answer 1

WebDriver offers three ways of switching to a frame:

1. Using a WebElement : find the frame using your preferred selector and switch to it

//Store the web element
WebElement iframe = driver.findElement(By.cssSelector("#modal>iframe"));

//Switch to the frame
driver.switchTo().frame(iframe);

//Now we can click the button
driver.findElement(By.tagName("button")).click();

2. Using a name or ID : If the name or ID is not unique on the page, then the first one found will be switched to.

//Using the ID
driver.switchTo().frame("buttonframe");
//Or using the name instead
driver.switchTo().frame("myframe");
//Now we can click the button
driver.findElement(By.tagName("button")).click();

3. Using an index : possible to use the index of the frame, such as can be queried using window.frames in JavaScript

// Switches to the second frame
driver.switchTo().frame(1);

4. Switch back to the default content:

// Return to the top level
driver.switchTo().defaultContent();