This repository contains a Spring Boot web application vulnerable to CVE-2021-44228, nicknamed Log4Shell. It uses Log4j 2.14.1 (through spring-boot-starter-log4j2 2.6.1) and the JDK 1.8.0_181. [+] ...
Java map() vs flatMap() — Learn the key differences, when to use each, and how to avoid nested Optional and Stream structures. With full runnable examples.
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