What is the method to find the element of the popup window on the Selenium Java page?

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To find the elements of the popup window on Selenium Java page, you can use the following method:

1. First, switch to the popup window using the getWindowHandle() method.

2. Then, use the findElement() method to locate the element on the popup window.

Example code:

// Switch to the popup window

String mainWindow = driver.getWindowHandle();

for(String handle : driver.getWindowHandles()) {

driver.switchTo().window(handle);

}

// Find element on the popup window

WebElement element = driver.findElement(By.id("elementID"));

// Do something with the element

element.click();

// Switch back to the main window

driver.switchTo().window(mainWindow);