Herong's Tutorial Examples

PKI Tutorials - Herong's Tutorial Examples
This tutorial book is a collection of notes and sample codes written by the author while he was learning PKI (Public Key Infrastructure) technologies himself. Topics include Root CA (Certificate Authorities); SSL, TLS, and HTTPS; Server and client authentication processes; Communication data encrypt... 2026-05-06, ≈14🔥, 5💬

💬 2024-11-16 Jay Sarna: Thankyou Dr. Yang. Got it.

💬 2024-11-10 Herong: Hi Jay, I have shared the PDF file with your google account. You should receive a notification with a download link.

💬 2024-10-03 Herong: Hi Jay, I am sorry that you haven't received the PDF file yet. It was sent on Sep 12 to your gmail address. It looks like gmail ...

💬 2024-10-01 Jay Sarna: Request for purchased books ----------------------------- Hello Dr. Yang I hope you are ok. I purchased pdf copy of this book vi...

💬 2016-02-07 john: thanks!

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mysqladmin - MySQL Admin Tool
This section describes how to use MySQL admin tool to check server status and other admin tasks. 2017-02-16, ∼100🔥, 2💬

CipherDES.java - A Java Implementation of DES
This section provides a tutorial Java program, CipherDES.java - A Java Implementation of DES encryption and decryption algorithm. 2017-02-16, ≈15🔥, 9💬

💬 2017-02-16 Herong: Andro, I think implementation of DES using String methods will be slower than using byte and int operations.

💬 2017-02-12 Andro: Good done. I have created my own DES with benefits of string methods in Java. My DES receives binary string and key, then cipher...

💬 2016-03-03 Dede: Helps a lot, currently developping a mobile application that has to do with encryption. Thanks

💬 2015-10-16 Herong: Skip, Good luck on your study!

💬 2015-10-15 Skip: I'm taking a graduate course in cryptography and this was extremely helpful for going from DES visual to DES in java. I really a...

(More comments ...)

GetMortgagePayment - Usage Description
This section describes the free Web service GetMortgagePayment provided by WebserviceX.NET. GetMortgagePayment allows you to calculate mortgage payments. 2017-02-11, ∼539🔥, 2💬

💬 2017-02-11 Herong: Sam, the GetMortgagePayment service is working. Can you show us the error you are getting?

💬 2017-02-04 sam: hello admin getMortgage payment service is not working. it is displaying xml tag exception while importing into soap UI can you ...

Calling createStatement() and executeQuery
This section describes how to run a SELECT query statement with createStatement() and executeQuery(). 2017-02-08, ∼232🔥, 2💬

"jar -C" - Changing Input Directory
This section provides a tutorial example on how to 'jar --create -C ...' to change input directory when creating JAR files. 2017-02-04, ∼1589🔥, 3💬

💬 2017-02-04 Herong: Chris, Thanks for sharing the information.

💬 2017-02-03 Chris: For unix, on the last command, ".;" changes to ".:".

PDF Printing Version
Information on how to obtain the PDF version of this book for printing. 2017-01-31, ∼1017🔥, 3💬

💬 2017-01-31 Linda Collins: Need to get cracking.

💬 2016-02-03 andi: good doc

Viewing Certificate Path
This section provides a tutorial example on how to view certificate path when visiting an 'https' Web site in IE. The top certificate in a certificate path is the CA certificate, which is trusted automatically. 2017-01-31, ∼1452🔥, 1💬

💬 2017-01-31 kishor: -----BEGIN CERTIFICATE----- MIIDqjCCApICCQC6MOh9nHUvUjANBgkqhkiG 9w0BAQUFADCBljELMAkGA1UEBhMCVVMxETAPBgNVBAgTCENvbG9yYWRvMRMwEQY. ..

Web Server Log Files and Analysis Tool - "Analog"
This chapter provides an introduction of 'Analog' - Web log file analysis tool. Topics include IIS and Apache log file samples, installing and configuring 'Analog', setting up 'Analog' to process Apache log files. 2017-01-29, ∼834🔥, 1💬

Using MD5 Message Digest in Java
This section provides a tutorial example on how to use MD5 message digest algorithm in Java. The JDK JCE package offers the MD5 algorithm through a generic message digest class, javax.security.MessageDigest. 2017-01-27, ∼733🔥, 2💬

Entering Non ASCII Characters in JSP Pages
This section describes rules on how non-ASCII characters can be entered in JSP pages and displayed correctly on Web browsers. 2017-01-25, ∼1171🔥, 3💬

💬 2017-01-25 abc: ทดสอบภาษาไทย

💬 2016-06-19 Herong: That was a good test. ☺

💬 2016-06-08 dfgd: <script>alert(document.cookie )</script>

Windows 7: Firewall Alert on Blocked Connection
This section provides a tutorial example on how Windows Firewall alerts you when it detects a blocked connection on Windows 7 system. 2017-01-24, ∼1232🔥, 2💬

💬 2017-01-24 tenani: thanx for showing scurity alert ans explaining step by step. very clear and useful

💬 2016-09-29 Manjit Chana: Thanks for exact information to enable me deal with above alert issue.

jstack - Stack Tracer to Generate Thread Dump
This section provides a tutorial example on how to use the 'jstack' tool to generate a thread dump (print all running threads and their stack traces). 2017-01-23, ∼936🔥, 1💬

Operations on "byte" Data Type Values
This section provides a tutorial example on how 'byte' values are casted to 'int' values when they are involved in arithmetic, comparison and bitwise operations. 2017-01-21, ∼6463🔥, 2💬

💬 2017-01-21 Herong: Anonymous, Good question. But what do you expect an operation of byte+byte will do?

💬 2017-01-19 Anonymous: Reason for why byte doesn't holds good the + operator directly.

BankingThread.java - Synchronization Sample Program
This section provides a tutorial example on how to solve the banking synchronization issue with Java synchronized methods. 2017-01-21, ≈10🔥, 5💬

💬 2017-01-21 Herong: Abhishek, I think this is the simplest example to demonstrate multi-threading and synchronization.

💬 2017-01-18 Abhishek: This is too complex for a beginner. Please write a simpler one.

💬 2016-09-17 Herong: dot.g, really? please give details.

💬 2016-09-15 dot.g: worst kind of programming

💬 2015-07-24 tintin: hi

Android Command Line Shell
This chapter provides tutorial notes on Android command line shell. Topics include introduction of Bourne Shell; Unix/Linux command line programs; Android command line tools; running Java application on Dalvik VM. 2017-01-20, ∼1509🔥, 1💬

Discontinued: GetISD - Get ISD Phone Code of a Given Country
This chapter provides a quick introduction of the free Web service, GetISD, returning the phone code of a given country. Topics include usage description of GetISD; request message sample; response message sample. 2017-01-17, ∼335🔥, 1💬

SOAP Java Implementations
This chapter provides notes and tutorials on SOAP Java Implementations: SAAJ, Axis and Apache WebService. 2017-01-16, ∼473🔥, 1💬

Reference Citations - HerongYang.com
This is a collection of reference citations to Herong's tutorial books on the Internet. Updated in 2026 (Version v2.96) with citations added. 2017-01-14, ∼1592🔥, 1💬

💬 2017-01-14 Rajia: Nice job!

Running PerlApp to Convert *.pl to *.exe
This section provides a tutorial example of running PerlApp from ActiveStat to convert a sample Perl script, DirGrep.pl, to Windows executable binary, DirGrep.exe. 2017-01-14, ∼3154🔥, 2💬

💬 2017-01-14 Herong: Monique, Yes, you run the commands listed in the tutorial at the command prompt.

💬 2017-01-12 Monique: Where do you actually run this???? from command prompt?

Accessing System Environment Variables
This section provides a tutorial example on how to access environment variables defined in the operating system using the System.getenv() method. 2017-01-14, ∼1044🔥, 2💬

💬 2017-01-14 Herong: Martin, The code has been corrected now. Thanks.

💬 2017-01-09 Martin Manek: Hi, line "java.util.Map envs = System.getenv();" is two times in code and "out is missing. PrintStream out = System.out;

What is CFB (Cipher FeedBack) Operation Mode?
This section describes what is CFB (Cipher FeedBack) Operation Mode - each plaintext block is XORed with the encrypted version of the ciphertext of the previous block to be the ciphertext block. 2017-01-13, ∼3022🔥, 3💬

💬 2016-12-07 fakhrulislam: i want a copy of this book !

💬 2015-11-06 poonam: a perfect explanation

What Is Western Zodiac
This section describes what is Western zodiac. 2017-01-12, ∼1387🔥, 1💬

💬 2017-01-12 Jimmy Neutron: not the best page

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, ≈12🔥, 2💬

💬 2017-01-10 hello: world

Viewing LG Android USB Device in Control Panel
This section provides a tutorial example on how to view the LG Android USB device in Windows Control Panel and see its detailed properties. 2017-01-09, ∼795🔥, 1💬

💬 2017-01-09 beto: congratulations

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