
In this
tutorial “CAPTCHA in Java using Google reCAPTCHA”.Google reCAPTCHA is
the popular CAPTCHA tool that allows to embed a CAPTCHA in UI and
validate the
input to block
automated spammers. reCAPTCHA provides a Java library and a easy way to implement the CAPTCHA. CAPTCHA stands for “Completely Automated Public Turing test to tell Computers and Humans Apart”.