how to write a code in selenium for 50 links in a webpage code example

Example 1: how to find all the links present in a web page

All the link TagName should be "a". 
I locate the webelements starts with tagname "a". 
I also use driver.findElements instead of driver.findElement since the 
list of webelements will return.

List <WebElement>  list = driver.findElements(By.tagName(a))

Example 2: how to find broken links in selenium

1-Collect all the links in the web page based on <a> tag.
2-Send HTTP request for the link and read HTTP response code.
3-Find out whether the link is valid 
or broken based on HTTP response code.
4-Repeat this for all the links captured.