JVM Tutorials - Herong's Tutorial Examples - v5.13, by Herong Yang
Download and Install JDK on macOS
This section provides a tutorial example on how to download and install the latest version JDK, which contains the HotSpot JVM, on a macOS system. A simple Java program was entered, compiled, and executed to verify the JDK installation.
In order try the HotSpot JVM, I downloaded and installed JDK 20 (Java SE 20) on my macOS system:
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
JVM (Java Virtual Machine) Specification
►Java HotSpot VM - JVM by Oracle/Sun
►Download and Install JDK on macOS
Download and Install JDK on Windows
Running Java HotSpot Client VM
Running Java HotSpot Server VM
HotSpot Memory Usages on Windows Systems
java.lang.Runtime Class - The JVM Instance
java.lang.System Class - The Operating System
ClassLoader Class - Class Loaders
Class Class - Class Reflections
JVM Stack, Frame and Stack Overflow
Thread Testing Program and Result
CPU Impact of Multi-Thread Applications
I/O Impact of Multi-Thread Applications
Micro Benchmark Runner and JVM Options
Micro Benchmark Tests on "int" Operations
Micro Benchmark Tests on "long" Operations
Micro Benchmark Tests in JIT Compilation Mode
Micro Benchmark Tests on "float" and "double" Operations