Download and Install JDK 20 on macOS

This section describes how to download and install JDK 20 on a macOS computer.

JDK 20 is also called Java SE (Standard Edition) 20. Here is what I did to download and install JDK 20 on my macOS computer.

1. Go to Oracle Java SE download website at oracle.com/technetwork/java/javase/downloads.

2. Click "JDK 20 > macOS" tab.

3. Click on the "jdk-20_macos-x64_bin.dmg" link in the "x64 DMG Installer" line to download the installation file to your "Downloads" directory.

4. Double-click on the "jdk-20_macos-x64_bin.dmg" file to install it.

To test the installation, open a command window to try the java command.

herong$ java -version
java version "20.0.1" 2023-04-18
Java(TM) SE Runtime Environment (build 20.0.1+9-29)
Java HotSpot(TM) 64-Bit Server VM (build 20.0.1+9-29, mixed mode, sharing)

Cool, I have successfully installed JDK 20 on my macOS computer!

Table of Contents

 About This JDK Tutorial Book

JDK (Java Development Kit)

 What Is JDK

Download and Install JDK 20 on macOS

 Download and Install JDK 17 on Windows

 Writing My First Java Program

 Adding JDK "bin" Directory to Path Setting

 JDK Documentation Installation

 Check JDK Version on CentOS

 Install JDK with "rpm" Command

 Install JDK with "yum" Command

 Java Date-Time API

 Date, Time and Calendar Classes

 Date and Time Object and String Conversion

 Number Object and Numeric String Conversion

 Locales, Localization Methods and Resource Bundles

 Calling and Importing Classes Defined in Unnamed Packages

 HashSet, Vector, HashMap and Collection Classes

 Character Set Encoding Classes and Methods

 Character Set Encoding Maps

 Encoding Conversion Programs for Encoded Text Files

 Java Logging

 Socket Network Communication

 Datagram Network Communication

 DOM (Document Object Model) - API for XML Files

 SAX (Simple API for XML)

 DTD (Document Type Definition) - XML Validation

 XSD (XML Schema Definition) - XML Validation

 XSL (Extensible Stylesheet Language)

 Message Digest Algorithm Implementations in JDK

 Private key and Public Key Pair Generation

 PKCS#8/X.509 Private/Public Encoding Standards

 Digital Signature Algorithm and Sample Program

 "keytool" Commands and "keystore" Files

 KeyStore and Certificate Classes

 Secret Key Generation and Management

 Cipher - Encryption and Decryption

 The SSL (Secure Socket Layer) Protocol

 SSL Socket Communication Testing Programs

 SSL Client Authentication

 HTTPS (Hypertext Transfer Protocol Secure)

 Outdated Tutorials

 References

 Full Version in PDF/EPUB