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First 8336 Hex Digits of PI
This section provides first 8336 hex digits of constant PI, 3.1415927..., needed for Blowfish encryption algorithm.
2016-10-31, 3420👍, 8💬

💬 2016-10-31 Andres: cool

💬 2016-04-07 Tamas Losonczi: This is great

💬 2016-03-15 Bogdan: Thanks!

💬 2015-12-03 Herong: Sadi, we only need (18*32+4*256*32)/4=8336 hex digits for the Blowfish encryption algorithm. I have typos in my tutorials. I wil...

💬 2015-12-02 Sadi: Sorry, I meant "8336 and not 8366"... Also would you like to compare these with "http://hexpi.sourceforge.net/" as there are som...

(More comments ...)

Removing IE Addon "Skype Browser Helper"
This section provides a tutorial example on how to disable and remove 'Skype Browser Helper' addon from Internet Explorer.
2016-02-08, 3414👍, 1💬

💬 2015-10-15 Theresa Zabolotny: There is no remove button on this one thanks or I would not be contacting you.

"soap:address" - Location of Service
This section describes 'soap:address', a SOAP extension element that specifies an address where Web service is located.
2016-10-03, 3365👍, 5💬

💬 2016-10-03 666: 6666

💬 2016-05-18 Nasir Peraiz: Nice work by your team

'jstatd' - JVM Remote Monitoring Server
This section describes the JVM remote monitoring server 'jstatd' and its options. 'jstatd' are used to allow JVM monitoring tools 'jps' and 'jstat' to access local JVM processes from a remote machine.
2017-04-01, 3357👍, 6💬

💬 2017-04-01 Herong: Asdaq, Thanks for sharing your comment.

💬 2017-03-31 Asdaq: For IBM SDK WebSphere Application Server this tool is not available.

💬 2015-12-13 Herong: Tim, I thought that every Linux system comes with JDK preinstalled. Not true?

💬 2015-12-12 tim: @majumder.soumya@gmail.com seems like you need to install jdk

💬 2015-07-29 Herong: Majumder, Are you using a remote Linux system? It could be that you user account do have the permission to run the "jstatd" tool...

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Chinese Character String with UTF-8 Encoding
This section providing information on handling Chinese character string literals in UTF-8 encoding.
2017-01-04, 3350👍, 8💬

💬 2016-03-10 Herong: Developers are welcome! ☺

💬 2016-03-09 as: o i am developer

💬 2016-02-15 test: Hello i am developer

💬 2015-11-07 Herong: 間單 and 间单 are corrected now. Thanks again for your comment. ☺

💬 2015-10-31 Herong: Yeah. I will fix it later. Thanks.

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XSD Validation and Error List
This section provides a tutorial example on how to perform XSD validation and view error list using XML Tools Plugin in Notepad++.
2017-05-27, 3261👍, 7💬

💬 2017-05-27 Herong: No problem. Have a good weekend!

💬 2017-05-27 Greg: Me again - false alarm, the error message I saw was caused by xsi:schemaLocation that was specified in the file. Sorry to troubl...

💬 2017-05-26 Greg: Hi, this was working fine, but now when I click Validate Now, I get an error message: Following error occurred during schema ...

💬 2015-12-23 Herong: Mat2001uk, That is better than the version I was testing. Thanks for sharing this information with us.

💬 2015-12-22 Mat2001uk: In v6.8.6 I see only one error:"XML Parsing error at line 16: StartTag: invalid element name" ...just FYI.

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XML Tutorials - Herong's Tutorial Examples
This free XML tutorial book is a collection of notes and sample codes written by the author while he was learning XML himself, an ideal tutorial guide for beginners. Topics include DOM, DTD, J2SDK, Java, SAX, Syntax, Templates, XML, XPath, XSD, XSL, XSLT, XSL-FO.
2016-05-07, 3245👍, 2💬

💬 2016-05-07 mehari: this tutorials helps many trainers through out the world, thanks!

💬 2015-07-19 Jay: What about JSON format?

Perl Tutorials - Herong's Tutorial Examples
This Perl tutorial book is a collection of notes and sample codes written by the author while he was learning Perl language himself. Topics include ActivePerl, data types, subroutines, debug, references, objects, open, binary, file, directory, DBM, MySQL, regular expression, RPC::XML, XML::Simple, S...
2015-07-17, 3200👍, 3💬

💬 2014-03-17 Steven Klotz: Hi Herong, I found this web site while looking for PERL examples. Your knowledge and the amount of work you done (docu, tutorial...

💬 2010-11-22 Herong: Kim, Yes, you can prompt the user for a path name, open directory with opendir(), loop through each files, use the -s operator t...

💬 2010-11-19 Kim: Thank you Herong. I am a beginner and teaching myself how to use PERL. I found your tutorials very interesting. I am building a ...

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.
2015-08-11, 3193👍, 1💬

💬 2015-08-11 hgfhfg: gjhg

Enable/Disable Services with "msconfig.exe"
This section describes a tutorial example on how to enable or disable a predefined service with the system configuration tool 'msconfig.exe'.
2016-06-27, 3106👍, 4💬

💬 2016-06-27 Herong: Sam, True. You should not disable all services. I will add a warning in the next update. Thanks.

💬 2016-06-25 sam: Should mention not to disable all services incl ms coz pc wifi and and network setting off and unable to used net.

💬 2015-12-04 Herong: Don, if a service has a status of "stopped", then it is not running on the system. You can leave it there as is. Or you can foll...

💬 2015-12-04 Don Pendleton: Many drivers and other items say stopped and following your instructions does not change them. The stopped word stays the same. ...

Create Tables with CLOB Columns
This section describes how to create tables with CLOB columns in Oracle server.
2017-06-20, 3086👍, 2💬

💬 2016-12-14 morgane: dhzeujf zihf zeiuhfzehf ezhf zoiehfqiejfcksbfhjre fnr jcrh vrf

UserInit - Winlogon Registry Key
This section provides a tutorial example on how to undo changes done by the PWS Trojan on the UserInit registry value under the HKLM\Software\Microsoft\Window sNT\CurrentVersion\Winlogon registry key.
2016-02-25, 3032👍, 2💬

💬 2015-10-22 Herong: Hi John, you are right that we need keep the comma at the end. Tutorial will be updated in the next version. Thanks.

💬 2015-10-21 John: You have left the comma off!! It is important you do not forget the comma or your computer will not boot. Userinit=C:\WINDOWS\sy...

Base32 Encoding Algorithm
This section describes the Base32 encoding algorithm with some simple encoding examples.
2016-08-31, 3016👍, 3💬

💬 2016-08-31 as: ok as

💬 2016-02-15 juraj: Dobry den Slovesk

"openssl pkcs8" Converting Keys to PKCS#8 Format
This section provides a tutorial example on how to convert a private key file from the traditional format into PKCS#8 format using the 'openssl pkcs8' command. Keys can still be encoded with DER or PEM with or without DES encryption in PKCS#8 format.
2016-04-12, 3008👍, 1💬

💬 2016-04-12 Nishant Desai: Does anyone knows any library by which i can execute openssl pkcs8 -topk8 -in openssl_key.pem -inform pem -out openssl_key_pk8_e...

Table of Contents
This free VBScript tutorial book is a collection of notes and sample codes written by the author while he was learning VBScript himself, an ideal tutorial guide for beginners. Topics include Variant, Array, Function, Error Handling, Regular Expression, Dictionary, File System, Class, Object, IE Brow...
2016-05-23, 2978👍, 1💬

💬 2016-05-23 Herong: James, your email address is not working. Please contact me.

Java Tutorials - Herong's Tutorial Examples
This free Java book is a collection of notes and sample codes written by the author while he was learning Java himself. It covers topics related Java language core features and classes provided in the java.lang.* package: array, bit, byte, deadlock, expression, generic class, generic method, literal...
2016-03-05, 2973👍, 8💬

💬 2016-03-05 SOUMO BISWAS: YES

💬 2016-02-26 Herong: Maurice, Thanks for the positive feedback!

💬 2016-02-25 Maurice: It is a great JVM book

💬 2015-12-05 Herong: Yogesh, we need better examples than what you have suggested...

💬 2015-12-05 yogesh kumar: Visit more java examples [URL removed]

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SQL Server CLOB (Character Large Object) - TEXT
This chapter provides tutorial notes on CLOB (Character Large Object) data types, TEXT, with SQL Server JDBC Driver. Topics include creating tables to store CLOB values in SQL Server server; inserting CLOB values with direct SQL INSERT statements, or PreparedStatement with setString(), setCharacterS...
2016-04-07, 2942👍, 1💬

💬 2016-04-07 kuchbhi: OK. Thank you................................. .................................... .................................... .............

Variable Declaration and "Dim" Statement
This section provides a quick introduction of what is a variable and how variable can be declared explicitly with a Dim statement and implicitly with an assignment statement.
2016-02-20, 2920👍, 2💬

💬 2014-12-14 Herong: Peter, Yes, you are correct. DIM is an abbreviation for "Declare in Memory", see "Siebel VB Language Reference" published by Ora...

💬 2014-12-01 Peter: Ehm DIM stands for "dimension"? Or perhaps it's an abbreviation for "Declare in memory"..

Checking FTP Server Log File
This section provides a tutorial example on how to check FTP server log file.
2016-09-25, 2888👍, 1💬

💬 2016-09-25 Humphrey Bogart: meaningful comments

Using "adb logcat" Command for Debugging
This section describes how to use the 'adb logcat -v' command option to control the format of log entries. 'adb logcat -v long' dumps all data elements of each log entry.
2016-08-02, 2797👍, 2💬

💬 2016-08-02 Herong: jayakrishna, I don't think Android is recording log entries in microsecond accuracy.

💬 2016-07-22 jayakrishna: here logcat is having milli sec accuracy, is it possible to get in micro seconds?

JDBC-ODBC - Creating DSN for MS Access
This section describes how to create a DSN that connected to a MS Access database file.
2015-09-20, 2760👍, 3💬

💬 2007-10-18 Herong: Evan, thanks for pointing out the typo on DSN. They are corrected now.

💬 2007-10-16 Evan: JDBC-ODBC - Creating DNS for MS Access should read "DSN" not "DNS"

Retrieving CLOB Values with getClob() Method
This section describes how to retrieve CLOB values with the ResultSet.getClob() method.
2015-12-04, 2724👍, 1💬

💬 2015-12-04 asdadsads: hello its me

"keytool" Commands and "keystore" Files
This chapter provides tutorial notes and example codes on the 'keytool' command. Topics include introduction of public key certificates, 'keystore' file, 'keytool' command; generating new keys and self-signed certificates; exporting and importing certificates; cloning certificates to share keys.
2015-11-23, 2596👍, 3💬

💬 2015-08-10 mike: Cool

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.
2017-03-19, 2582👍, 3💬

💬 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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