Herong's Tutorial Examples: JVM

Free Chinese Calendar 2026 - Year of the Horse
Want to know when is the 2026 Chinese New Year day? Look for free Chinese calendars for 2026? Chinese New Year Date for Year 2026 ⇒ Free Chinese Calendar 2027 - Year of the Goat ⇐ Free Chinese Calendar 2025 - Year of the Snake ⇑ Chinese New Year Dates in 2021 to 2030 ⇑⇑ Free Chinese Calendars 2025-12-23, ≈144🔥, 0💬

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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. 2023-09-09, ≈97🔥, 61💬

💬 2023-09-09 Anthony: great

💬 2023-05-13 james: oki

💬 2022-01-10 G.S.S.VARAPRASADRAO: cool

💬 2021-11-15 thang: that geart

💬 2021-06-08 anil: thanks

(More comments ...)

-Xss JVM Option for Stack Size
This section describes the -Xss option to specify JVM stack size. Changing stack size can help to estimate frame size. The frame size is 32 bytes for a simple method call. 2019-08-24, ≈15🔥, 1💬

💬 2019-08-24 sksksk: <a href="/1'"><svg/onload=alert( 1)>">click</a>

Archived: Download and Install JDK 1.7.0 on Windows
This section provides a tutorial example on how to download and install JDK 1.7.0 (Java SE 7) on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2023-06-24, ∼8962🔥, 14💬

💬 2023-06-24 nelson: thanks

💬 2020-04-28 eeeee: thanks

💬 2017-01-02 sudhanshu: no comments

💬 2016-12-17 tangxy: thk, i just want to learn java

💬 2016-11-22 ankit: THANKS

Downloading and Installing JRockit R28.2.7
This section provides a tutorial example on how to download and install Oracle JRockit 6 R28.2.7 on Windows systems. 2022-12-10, ∼6942🔥, 3💬

💬 2018-10-11 cxtr: tanks good

Java GC Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial notes and sample codes written by the author while he was learning JVM GC (Garbage Collection) processes. Topics include Java Garbage Collectors, STW (Stop-The-World), Serial Collector, Parallel Collector, Concurrent Collector, G1 Collector, GC Algorithms, Gener... 2019-01-01, ∼6212🔥, 1💬

💬 2018-06-17 Jack: It's helpful!

Download and Install JDK on Windows
This section provides a tutorial example on how to download and install the latest version JDK, which contains the HotSpot JVM, on a Windows system. A simple Java program was entered, compiled, and executed to verify the JDK installation. 2021-11-12, ∼4705🔥, 2💬

💬 2021-11-12 huj: kurwa huj

💬 2021-10-19 Bogo: thanks!

JVM "-verbose:class" Option
This section provides a tutorial example on how to the '-verbose:class' option on the 'java' command to see when and where classes are loaded into the JVM. 2019-07-19, ∼4495🔥, 1💬

Full Version in PDF/EPUB
Information on how to obtain the full version of this book in PDF, EPUB, or other format. 2021-06-09, ∼3235🔥, 12💬

💬 2021-06-09 Umesh: Thanks

💬 2019-01-28 Luke: Thanks

💬 2016-12-05 Rahul: very good

💬 2016-11-07 bob: thanks.

💬 2016-09-29 Awanputih: Thanks a bunch

(More comments ...)

PC Register and Native Method Stack
This section describes PC Registers and Native Method Stacks, which are reserved one per thread. Normal Java applications do not have any significant impact on PC Registers and Native Method Stacks. 2023-07-15, ∼3125🔥, 4💬

💬 2023-07-15 Makhdoom: Great info.

Garbage Collection Logging Options
This section describes HotSpot JVM options to generate garbage collection log messages. '-Xlog:gc', '-Xlog:gc*=debug', '-Xlog:gc*=debug:file' are very useful options. 2018-06-24, ∼2935🔥, 1💬

💬 2018-06-24 Tina: This is useful.

💬 2018-04-23 Don: Thanks for the detailed explanation!

What Is Micro Benchmark?
This section describes what is Java micro benchmark and general guidelines on writing micro benchmark programs. 2019-08-08, ∼2876🔥, 2💬

💬 2019-08-08 Larry b: I am studying java. I am also studying big O notations. All of a sudden you see something like jmh and you feel dwarfed. The big...

💬 2019-04-03 Rahul: Good article. Keep writing. Thanks

Archived: Download and Install JDK 1.8.0 on Windows
This section provides a tutorial example on how to download and install JDK 1.8.0 (Java SE 8), which contains the HotSpot 1.8 JVM, on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2018-09-01, ∼2798🔥, 2💬

💬 2018-09-01 Herong: arye, if you go to the JDK download website now, you can download JDK 10.0.2, which is higher than 1.8.0_60.

💬 2018-08-16 arye: After installing the software MotiveWave Ultimate Edition I get an error message It says This application requires a Java Runtim...

"-XX:+PrintGCDetails" - Garbage Collection Logging
This section describes HotSpot JVM options to generate garbage collection logging messages. It also describes log message format to help us understand what the JVM is telling us. 2018-04-23, ∼2711🔥, 1💬

JVM Tutorials - Herong's Tutorial Examples
This book is a collection of notes and sample codes written by the author while he was learning JVM himself. Topics include JVM (Java Virtual Machine) Architecture and Components; Oracle JVM implementation - HotSpot; Eclipse JVM implementation - Eclipse OpenJ9; java.lang.Runtime - The JVM Instance c... 2015-07-18, ∼2684🔥, 0💬

Shutting Down or Terminating the JVM Instance
This section provides a tutorial example on how to shutdown or terminate the JVM instance using exit() or halt() method. 2022-10-01, ∼2477🔥, 0💬

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. 2016-01-26, ∼2383🔥, 1💬

💬 2016-01-26 Mangkorn: Thanks

"superclass access check failed" Class Load Error
This section provides a tutorial example of 'superclass access check failed' class load error. 2019-11-10, ∼2340🔥, 1💬

What Is JVM Stack?
This section describes what are JVM stacks. One stack is created for each thread to hold frames which store local variables, partial results of currently executing nested methods. 2025-04-08, ∼2338🔥, 2💬

💬 2022-05-26 Abdurauf from Uzbekistan: good tutorial to learn thread area

Java 8 GC Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial notes and sample codes written by the author while he was learning JVM GC (Garbage Collection) processes. Topics include Java Garbage Collectors, STW (Stop-The-World), Serial Collector, Parallel Collector, Concurrent Collector, G1 Collector, GC Algorithms, Gener... 2025-12-31, ∼2178🔥, 2💬

💬 2019-09-07 Venmo: Very helpful. Thanks!

Running Java HotSpot Server VM
This section provides you a tutorial example on how to run Java HotSpot Server VM - run Java command with -server option: 'java -server'. 2015-08-04, ∼2098🔥, 1💬

💬 2015-08-04 anil: i want system to phone net

"-XX:ParallelGCThreads" - # of Threads
This section describes how to use the '-XX:ParallelGCThreads' JVM option to control the number threads to be used by the Parallel Collector. 2022-10-01, ∼2045🔥, 0💬

"-XX:SurvivorRatio" - Ratio of Eden and Survivor Space
This section describes the default 'new' ratio (size ratio of tenured vs. 'new' generation). 2022-10-01, ∼1844🔥, 0💬

"-XX:NewRatio" - Ratio of Tenured and "new" Generation
This section describes the default 'new' ratio (size ratio of tenured vs. 'new' generation). 2022-11-09, ∼1630🔥, 1💬

💬 2022-11-09 djs: Thank you for this great explanation :)

"-XX:+PrintCompilation" - Watching JIT Compilation Logs
This section provides a tutorial example on how to use the HotSpot JVM command option, -XX:+PrintCompilation, to watch JIT compilation logs. The JIT compilation of the test method to native machine code does reduce the execution by 25%. 2022-10-01, ∼1483🔥, 0💬

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