
<p>Java 21 will likely be the next LTE version, to be eleased in 2023. This page summarizes changes in Java 18, 19, 20 and 21.</p>
<h2>Spec / Language</h2>
<p>JEP 420: Pattern Matching for switch (Second Preview)</p>
<h2>Core Java Library</h2>
<ul>
  <li>JEP 400: UTF-8 by Default (java.nio.charsets)</li>
  <li>JEP 408: Simple Web Server (java.net)</li>
  <li>JEP 416: Reimplement Core Reflection with Method Handles (java.lang.reflect)</li>
  <li>JEP 417: Vector API (Third Incubator)</li>
  <li>JEP 418: Internet-Address Resolution SPI (java.net)</li>
  <li>JEP 419: Foreign Function &#x26; Memory API (Second Incubator)</li>
  <li>JEP 421: Deprecate Finalization for Removal (java.lang)</li>
</ul>
<p>JEP 417 / 419 are part of Project Panama (connecting JVM and foreign / non-Java APIs).</p>
<h2>Tools</h2>
<ul>
  <li>JEP 413: Code Snippets in Java API Documentation</li>
</ul>


What's new in Java 21

Google Ads vs Google Marketing Platform vs Google Ad Manager vs AdSense vs AdMob

Life of an Ad Request

Ads - Random Notes

Ads - Versus

Android - Concepts

Android - Location

Android - Overview

Android - Tools

Android - Trouble Shooting

Careers - Overview

Leadership

Careers - Level Up

Careers - Specializations

Cheatsheets - MySQL

Cheatsheets - Shell

Cheatsheets - SQL

Cheatsheets - tmux

Cheatsheets - Vim

C++ Keywords - auto

C++ - Caveats

C++ - const vs constexpr vs consteval vs constinit

C++ - Containers

C++ Keywords - explicit

C++ - Functions

C++ Keywords

C++ - Language Concepts

C++ - lvalue vs rvalue vs xvalue vs prvalue vs glvalue

C / C++ - Memory Management

Modern C++

C++ - Numerics

C++ - Operators

C / C++

Pointers vs References

Modern C++ - Smart pointers

C++ - Trouble Shooting

C / C++ - Type Casting

C++ - Versus

C++ Keywords - virtual

Bits and Bytes

Data Compression

Data Formats

Endianness

Unicode

Least Frequently Used (LFU) Cache

Least Recently Used (LRU) Cache

Advanced Data Structures

Array

Big-O Complexity

Algorithm - Binary Search

Algorithm - Bipart

Coding Interview - Easy Problems

Hash

Algorithm - Linked List

Lowest Common Ancestor

Math

Number

Data Structures and Algorithms

Probabilistic Data Structures

Quick Select

RMQ - Range Minimum Queries

Sort

Stack

String

Tree

Trie

Caching

Databases - Concepts

Data Warehouses

Graph

MongoDB

MySQL

Databases

PostgreSQL

Databases - Spanner and Related Databases

Databases - Wide Column Stores

Factorio

Factorio - Tips

Games

GatsbyJS - Ignore Folders/Files

GatsbyJS - Last Updated

GatsbyJS - Multiple Source Folders

GatsbyJS - Overview

GatsbyJS - How to Add Sidebars

GatsbyJS - How to Add Slug Field

GatsbyJS - How to Create Table of Contents

Git - Troubleshooting

Git - Versus

Hadoop - Configuration

Hadoop - Java API

Hadoop - Overview

Hadoop - Scala API

Hadoop - Trouble Shooting

Build a PC

Camera

Computer Architecture