Herong's Tutorial Examples

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 2026-02-17, ≈151🔥, 1💬

Relativity of Simultaneity in Minkowski Diagram
This section provides a demonstration of the relativity of simultaneity phenomenon using a Minkowski diagram. 2019-01-17, ∼1106🔥, 1💬

💬 2019-01-17 hiroji kurihara: Relativity of simultaneity From just above, plane waves of star light are coming horizontally. An observer stands on the ground ...

Creating Tables with AUTO_INCREMENT Columns
This section describes how to create a table with an AUTO_INCREMENT column. 2019-01-03, ∼100🔥, 4💬

Lock Types and Lock Levels
This section describes 2 types of locks: Read Lock (Shared Lock) and Write Lock (Exclusive Lock), and 3 levels of locks: Table Lock, Row Lock, and Column Lock. 2019-01-02, ∼6632🔥, 2💬

💬 2016-10-31 Shivin: haha very 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, ∼6246🔥, 1💬

💬 2018-06-17 Jack: It's helpful!

"async" Function Example
A tutorial example is provided on how to write an 'async' function with Task<T> return type. An 'async' function needs an 'await' expression to trigger a child thread to split executions. 2018-12-08, ∼379🔥, 3💬

💬 2018-12-08 Herong: Alan, Thanks for sharing the issue and the solution. It's definitely helpful.

💬 2018-12-06 Alan: Found the reason: https://blog.stephencleary.com/2012/ 07/dont-block-on-async-code.html

💬 2018-12-06 Alan: This code works. Then I insert this into a WindowsForms app, activate on a button click, and it just hangs. Why?

Using SHA1 Message Digest in Java
This section provides a tutorial example on how to use SHA1 message digest algorithm in Java. The JDK JCE package offers the SHA1 algorithm through a generic message digest class, javax.security.MessageDigest. 2018-12-04, ≈26🔥, 11💬

💬 2018-12-04 Gowtham: Great & Layman Terms

💬 2018-09-12 Onkar D: very good summary about SHA1

💬 2018-08-31 Munikumar: Great...

💬 2017-10-24 Siva: Thanks

💬 2017-08-24 Superman: <script>alert("xss");< /script>

(More comments ...)

Displaying Chinese Characters in Frame Title
This section provides a tutorial example on how to display Chinese characters in the title bar of a frame window with a given Chinese font. 2018-11-22, ∼1729🔥, 2💬

💬 2018-11-22 Herong: SuperMario, Thanks for sharing your comments. Are you still using JDK 1.1.8?

💬 2018-11-19 SuperMario: For the old JDK the characters are displayed as "?" because that's the default character defined in the JRE to display when no c...

"Property Let/Set/Get" Procedures
This section provides a tutorial example on how to use 'Property Let/Set/Get' procedure to define public properties. 2018-11-22, ≈28🔥, 8💬

💬 2018-11-22 Herong: vba4dummies, "sEmail" is an argument of the "Let Email()" function. It will get its value when the function is called.

💬 2018-11-11 vba4dummies: What/how is "sEmail" defined as? Good explanation but doesn't help that parts of code are missing.

💬 2017-06-05 pepe: thanks!

💬 2017-04-25 utmozt: nice tutorial!

💬 2016-11-02 Herong: Christian, RegExp is a built-in class in VSScript. You can use it anywhere you want to. In this tutorial, RegExp is used to crea...

(More comments ...)

Archived: Visiting "https" Web Site with Firefox 3
This section describes how Firefox 3 shows a lock icon when you visit an 'https' Web site to provide you more security related information. 2018-11-10, ∼430🔥, 2💬

💬 2018-11-10 Herong: Falle, try to use whois.icann.org to get more information about that website.

💬 2018-11-10 Falle: Thanks for your help . I couldn't access full information about cardtopia.org a website that scammed me of apple gift cards wort...

Using Google Chrome as an XML Syntax Checker
This section provides a tutorial example on how to use Google Chrome as an XML file syntax checker. If there are syntax errors in an XML file, Chrome will stop displaying the XML file at the first error location. 2018-11-10, ∼5414🔥, 3💬

💬 2018-11-10 Herong: ej, You are right. Chrome can only parse an XML document and print out issues that occur during the parsing process. If you want...

💬 2018-11-08 ej: While the information contained here seems to be correct, I would use the term "well wormedness verification" in place of "synta...

💬 2017-08-11 literal nazi: meaningful comments

GetCountries - Usage Description
This section describes the free Web service GetCountries provided by WebserviceX.NET. GetCountries allows you to retrieve names of all countries and territories in the world. 2018-10-20, ∼2863🔥, 4💬

💬 2018-10-20 Herong: Wendy, thanks for information. Looks like webservicex.net has stopped their Web services.

💬 2018-10-06 Wendy: http://www.webservicex.net/ is not working.

💬 2017-01-08 Herong: Bessie, thanks for sharing the information.

💬 2017-01-07 Bessie: For SoapUI 5.3 on Mac OSX, these steps got me the project: - File > Create Empty Project (for me it made Project 3) - right-clic...

Introduction to DES Algorithm
This chapter provides tutorial examples and notes about DES (Data Encryption Standard) algorithm. Topics include description of block cipher, DES encryption algorithm, Round Keys Generation, DES decryption algorithm. 2018-10-18, ∼2081🔥, 4💬

💬 2018-10-18 sam: harry please stop bullying me

Including VBScript Code with HTML "script" Tags
This section provides a quick description of how to include VBScript code into HTML documents with 'script' tags. A tutorial example is provided on calling a function defined in the 'head' tag. 2018-10-11, ∼1347🔥, 3💬

Archived: IE 8 Displaying Certificate Error Page
This section provides a tutorial example showing that IE 8 fails to validate an HTTPS server certificate and displays a certificate error page. 2018-10-06, ∼891🔥, 2💬

💬 2018-10-06 Herong: Onur, Maybe the auto-install root CA certificate function has been turned off on your Win7 system. But you can always do it manu...

💬 2018-09-25 Onur: I use IE8 with Win7 x64 and i got SSL certificate error while accessing sites issued with Digicert Global Root CA "G2" certifica...

Literal Formats for Integers - Example
This section provides a tutorial example on how to use integer literals in 4 formats: decimal, hex, octal and binary. 2018-10-02, ∼396🔥, 1💬

'jstat -gcutil' - Garbage Collection Statistics
This section provides a tutorial example on how to use the 'jstat -gcutil' command to get garbage collection statistics against a specified JVM process ID. 2018-09-22, ∼2818🔥, 2💬

💬 2018-09-22 Herong: Jagan, "jstat" is for Windows system only. You need to use vmstat or iostat on Oracle Solaris or Linux operating system.

💬 2018-09-22 jagan: cd /usr/java/jdk1.8.0_172/bin/j jar jarsigner java javac java-rmi.cgi jcmd jdeps jjs jps jrunscript jstat is not there.. what we...

"bitcoin-cli sendtoaddress" - Send Bitcoin
This section describes how to sent Bitcoins to another address test transaction on live.blockcypher.com. 2018-09-17, ∼3766🔥, 4💬

💬 2018-09-17 Herong: Berk, or you can use the "sendfrom" command: sendfrom <fromaccount> <tobitcoinaddress> <amount>

💬 2018-09-16 Berk: Thank you for replying. How to set default account?

💬 2018-09-15 Herong: Berk, To send bitcoin from Test 1 to Test 2, you need to: Set default account to Test 1. Get the address of Test 2. Run sendtoad...

💬 2018-09-12 Berk: How to sent by from wallet? I want to send by wallet to target wallet. For example: C:\>\local\bitcoin-0.15.1\bin\bitcoi n-cli.ex...

SWF File Example - Dump Output
This section provides a tutorial example on how to dump the file structure and list of tags of SWF file using the 'swfdump' command from 'SWFTools'. 2018-09-12, ∼736🔥, 1💬

💬 2018-09-12 jeff: this was so bad

Listing All Tables - getTables()
This section describes how to get a list of all tables in the current database on the SQL Server through the DatabaseMetaData object. 2018-09-01, ∼246🔥, 2💬

Retrieving CLOB Values with getString() Method
This section describes how to retrieve CLOB values with the ResultSet.getString() method. 2018-09-01, ∼100🔥, 2💬

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, ∼2821🔥, 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...

Downloading and Installing SoapUI
This section provides a tutorial example on downloading and installing SoapUI 5.0.0 on Windows system. 2018-08-30, ∼2721🔥, 5💬

💬 2018-08-30 Tom: thank u

💬 2018-07-11 annie: hello

💬 2016-04-16 Edo: Thank you

Declaring Root Elements - "element" Element
This section describes a tutorial example on how to use the Element Declaration Component to declare the root element for a conforming XML document. 2018-08-29, ∼9147🔥, 6💬

💬 2018-08-29 google: <a href="http://google.com">Google& lt;/a>

💬 2018-08-29 rock: Great

💬 2017-03-19 Jay: Thanks dude...

💬 2016-02-02 Herong: Shashi, XML schema does not support unbounded root elements. Only one single root element is allowed. So your schema example is ...

💬 2016-02-01 Shashi: Can you have a root element, which is unbound? Like as follows? Can you please let me know if it valid?

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