Running Java HotSpot Client VM

This section provides you a tutorial example on how to run Java HotSpot Client VM - run Java command in default mode: 'java'.

After installing JDK, the Java HotSpot Client VM should be available on my machine. To verify this, I used the following command to try it:

herong$ java -version -client
java version "14.0.1" 2020-04-14
Java(TM) SE Runtime Environment (build 14.0.1+7)
Java HotSpot(TM) 64-Bit Server VM (build 14.0.1+7, mixed mode, sharing)

C:\herong>\progra~1\java\jdk-10.0.1\bin\java -version
java version "10.0.1" 2018-04-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode)

Surprisingly, Java HotSpot Client VM is not provided in 64-bit version of JDK 10 and higher. The "java" command runs Java HotSpot Server VM only, even if you specify the "-client" option.

Examples of running older versions of Java HotSpot Client VM:

C:\herong>\progra~1\java\jdk1.8.0_45\bin\java -version
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
Java HotSpot(TM) Client VM (build 25.45-b02, mixed mode)

C:\herong>\progra~1\java\jdk1.7.0_45\bin\java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) Client VM (build 24.45-b08, mixed mode, sharing)

C:\herong>\progra~1\java\jdk1.6.0_02\bin\java -version
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b06)
Java HotSpot(TM) Client VM (build 1.6.0_02-b06, mixed mode, sharing)

C:\herong>\progra~1\java\j2sdk1.4.0_02\bin\java -version
java version "1.4.0_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_02-b02)
Java HotSpot(TM) Client VM (build 1.4.0_02-b02, mixed mode)

Table of Contents

 About This Book

 JVM (Java Virtual Machine) Specification

Java HotSpot VM - JVM by Oracle/Sun

 What Is HotSpot JVM

 Download and Install JDK on macOS

 Download and Install Latest 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 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

 Outdated Tutorials


 Full Version in PDF/EPUB