JVM Tutorials - Herong's Tutorial Examples

∟Java HotSpot VM - JVM by Oracle/Sun

This chapter provides tutorial notes and example codes on Java HotSpot VM. Topics include running Java HotSpot VM in client and server modes; checking memory usage with the Runtime class.

What Is HotSpot JVM

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

Takeaways:

• HotSpot (or Java HotSpot Virtual Machine) is an implementation of the JVM Specification originally developed by Sun Microsystems and now supported by Oracle Corporation.
• HotSpot operates in 2 modes: Client JVM and Server JVM.
• HotSpot Client JVM is designed to run smaller Java client programs.
• HotSpot Server JVM is designed to run larger java server programs.

Table of Contents

 About This Book

 JVM (Java Virtual Machine) Specification

►Java HotSpot VM - JVM by Oracle/Sun

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

 ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 JVM Runtime Data Areas

 JVM Stack, Frame and Stack Overflow

 Thread Testing Program and Result

 CPU Impact of Multi-Thread Applications

 I/O Impact of Multi-Thread Applications

 CDS (Class Data Sharing)

 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

 OpenJ9 by Eclipse Foundation

 JRockit JVM 28.2.7 by Oracle Corporation

 Archived Tutorials

 References

 Full Version in PDF/EPUB

Java HotSpot VM - JVM by Oracle/Sun - Updated in 2024, by Herong Yang