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Java Optional Cheat Sheet Category: Creation Methods / Descriptions: > Optional.empty() - Creates an empty Optional > Optional.of(value) - Creates Optional with non-null ...

java.util.Optional What is  Optional ? Optional<T>  is a  container object  introduced in  Java 8  to represent a value that may or may not be presen...

BIG thanks to iluwater , Java design Patterns website and book helping me learn Java. Abstract Document design pattern provides consistent way to handle hierarchical and tree-like data str...

Differences between XML and HTML XML and HTML were designed with different goals: XML is designed to carry data emphasizing on what type of data it is. HTML is designed to display data empha...

 Linux Bash Scripting Bash is a command-line interpreter or Unix Shell or Bash Scripting is used to automate the execution of the tasks so that humans do not need to perform them ...