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HttpsClient.java - HTTPS Client Test Program
This section provides a tutorial example on how to write a HTTPS client test program, HttpsClient.java. It sends a simple HTTP request page using the HTTPS protocol.
2015-11-20, 4308👍, 6💬

💬 2015-11-20 Herong: Philip, can you run HttpsHello server with SSL debug turned on? My test programs do have issues with newer build of JDK 1.7 and ...

💬 2015-11-19 Philip: java version "1.7.0_80" Java(TM) SE Runtime Environment (build 1.7.0_80-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11,...

💬 2015-11-19 Herong: Philip, which JDK version are you using?

💬 2015-11-18 Philip: I changed the code, but then reset back to the example. I recreated the jks a few times. The JVM and OS had not changed. It stop...

💬 2015-11-18 Herong: Philip, Was anything changed? Certificates, code, JVM or operating system...

(More comments ...)

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.
2017-10-15, 4280👍, 2💬

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

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

A Sample WSDL 2.0 Document
This section describes a sample WSDL 2.0 document, which defines a Web service, helloService, with an operation called Hello.
2016-03-11, 4212👍, 1💬

💬 2015-08-12 Vivek: Hello fighter

UTF-16LE Encoding
This section provides a quick introduction of the UTF-16LE (Unicode Transformation Format - 16-bit Little Endian) encoding for Unicode character set. UTF-16LE is a variation of UTF-16.
2017-04-08, 4168👍, 5💬

💬 2017-04-08 Tj: Wow

💬 2016-12-21 task go: thank you

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, 4116👍, 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...

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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, 4100👍, 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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What Is SHA1 Message Digest Algorithm?
This section describes what is SHA1 (Secure Hash Algorithm 1) - a message digest algorithm which takes as input a message of arbitrary length and produces as output a 160-bit 'fingerprint'.
2017-12-09, 4064👍, 6💬

💬 2017-12-09 Herong: See the next tutorial: SHA1 Message Digest Algorithm Overview.

💬 2017-12-04 V: where can we find sha-1 formula ?

💬 2016-01-16 raza: i am raza see you latter

💬 2015-10-10 Herong: Ash, the next tutorial may help you understand better: SHA1 Message Digest Algorithm Overview

💬 2015-10-09 Ash: Please can u explain clearly..I dint understood

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"bad decrypt:./crypto/evp/evp_enc.c:461" Error
This section provides a tutorial example on why OpenSSL 'pkcs12' failed with 'bad decrypt:./crypto/evp/evp_enc.c :461'error. The root cause is the key password different than file password.
2015-09-10, 4034👍, 1💬

💬 2015-09-10 Action Here: this totally helped me.

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.
2017-07-24, 3994👍, 5💬

💬 2017-07-15 Herong: Thomas, "Skype Browser Helper" add-on is part of the "Skype Click to Call" installed program. So uninstall "Skype Click to Call"...

💬 2017-07-14 Thomas: I also notice that these programs DO NOT APPEAR under Windows Programs and Features. Thus, your suggestion to go there and remov...

💬 2017-07-14 Thomas: Firstly, you mention how to disable the add-on, NOT how to REMOVE IT. Secondly, why are you talking about PDF Link Helper at all...

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

"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, 3960👍, 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...

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, 3944👍, 1💬

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

Checking FTP Server Log File
This section provides a tutorial example on how to check FTP server log file.
2016-09-25, 3819👍, 1💬

💬 2016-09-25 Humphrey Bogart: meaningful comments

Base32 Encoding Algorithm
This section describes the Base32 encoding algorithm with some simple encoding examples.
2016-08-31, 3763👍, 3💬

💬 2016-08-31 as: ok as

💬 2016-02-15 juraj: Dobry den Slovesk

'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, 3758👍, 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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addHeader() - Setting SOAPAction Header Line
This section provides a tutorial example on how to use the MimeHeaders class and the addHeader() method to add the SOAPAction header line for the final HTTP request.
2017-01-10, 3755👍, 2💬

💬 2017-01-10 hello: world

Chinese Character String with UTF-8 Encoding
This section providing information on handling Chinese character string literals in UTF-8 encoding.
2017-01-04, 3745👍, 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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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...
2017-10-06, 3685👍, 4💬

💬 2017-10-06 drhvr: mysql I added root as user and password.in singlequotes. It works great

💬 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 ...

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, 3661👍, 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, 3655👍, 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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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, 3623👍, 1💬

💬 2015-08-11 hgfhfg: gjhg

Table of Contents
This free book is a collection of notes and sample codes written by the author while he was learning Flash. Topics include ActionScript, ActiveX, classid, Flash, FFmpeg, OBJECT, Player, Plugin, Shockwave, SWF, SWFTools, Web.
2015-07-15, 3609👍, 1💬

💬 2015-07-17 Joe: Is Flash dead?

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, 3507👍, 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. ...

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, 3446👍, 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?

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, 3361👍, 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...

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