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Measuring Speed of Light - Roemer's Method
This section describes the method used by Ole Roemer to measure the speed of light using changes of observed eclipse periods of Jupiter's moon. 2016-11-14, 146👍, 1💬

JLabel - Swing Label Class
This chapter provides tutorial notes and example codes on JLabel class. Topics include creating label components with the javax.swing.JLabel class; creating labels with Chinese characters. 2016-11-14, 110👍, 1💬

Perl Crypt::Blowfish Module
Tutorial notes and example codes on Crypt::Blowfish Perl Module. Topics include introduction of Crypt::Blowfish; Download and installation; Behavior tests; Test vector verification; Building 128-bit key test vectors. 2016-11-14, 137👍, 1💬

💬 2016-11-14 martin: expretion of some one to the things done on him

Drawing Graphics - Using paint() on Frame
This section provides a tutorial example on how to override the paint() method in the javax.swing.JFrame class to draw graphics (a rectangle) on the frame window. This solution is not recommended. 2016-11-12, 1680👍, 2💬

💬 2016-11-12 SuperSasRabushna: I'm super saiyan!!! rabushna!

💬 2016-11-12 Ciciozxz: I think you are the best eu!

DES Encryption Operation Modes
This chapter provides tutorial examples and notes about DES encryption operation modes. Topics include how different blocks of plaintext can be coupled together to improve the strength of the DES encryption algorithm; ECB (Electronic CodeBook), CBC (Cipher Block Chaining), CFB (Cipher FeedBack), and... 2016-11-12, 224👍, 1💬

💬 2016-11-12 kazim: very good webpage

JSP Java Tag Interface
This chapter provides tutorial notes and example codes on JSP Java tag interface. Topics include the javax.servlet.jsp.tagext package; JspTag, SimpleTag and IterationTag interfaces; SimpleSupport and TagSupport classes; implementing IterationTag interface. 2016-11-10, 113👍, 1💬

"INSERT INTO" Statements
This section describes how to insert data rows with INSERT INTO statements. 2016-11-08, 138👍, 1💬

Nested Tags Example - Break Tag for Loops
This section provides a tutorial example on how to create 2 tag classes to a support nested custom tags in JSP pages. As an example, a Loop tag and a Break tag is created to work together. 2016-11-08, 122👍, 1💬

SQLCMD SQL Server Command Line Tool
This section describes how to SQL Server command line tool - SQLCMD. 2016-11-08, 367👍, 1💬

💬 2016-11-08 Vineesh: SELECT DB_NAME(); GO

SHA1 Mesasge Digest Algorithm
This chapter provides tutorial notes and example codes on the SHA1 message digest algorithm. Topics include SHA1 algorithm overview; using SHA1 in Java, PHP, and Perl. 2016-11-05, 1151👍, 5💬

💬 2015-10-14 Herong: Yojana, information on key generation of Blowfish Algorithm can be found in Key Schedule (Sub-Keys Generation) Algorithm tutoria...

💬 2015-10-13 Yojana Yadav: Plz send me the detail of key generation of Blowfish Algorithm

💬 2013-06-28 Herong: Abbas, You are welcome!

💬 2013-06-26 abbas: thank you for sha-1 and it's so helpful

Encryption using RSA Public Key with SoapUI
This section provides a tutorial example on how to encryption the SOAP body element content with a RSA public key certificate using SoapUI. 2016-11-04, 818👍, 3💬

💬 2016-11-04 kalasba: hi, please can you share online training & video ?

💬 2016-07-14 Herong: Hi Sejai, please share SoapUI tutorials here, not ads.Thanks.

💬 2016-07-09 sejal: hi,we provide online training & video tutorial for soapui for free videos refer [URL removed]

Main Features of JSP 2.1
This section describes main features of JSP 2.1 including scripting elements, built-in objects, directives, JavaBean objects, JSTL, EL and standard actions. 2016-11-02, 520👍, 2💬

💬 2016-04-17 arun: i'm arun

insertRow() - Inserting New Rows through ResultSet Objects
This section describes how to insert rows into target tables through ResultSet objects. 2016-11-01, 211👍, 1💬

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, 3422👍, 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 ...)

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. 2016-10-31, 549👍, 1💬

💬 2016-10-31 Shivin: haha very good

Activity Diagram - Accept Event Notation
This section describes the Accept Event Notation used in a UML Activity Diagram. An Accept Event Notation represents an action that waits for an event to arrive from outside and processes it. 2016-10-26, 294👍, 1💬

💬 2016-10-26 at_svg: useful

Removing IE Addon "PDF Link Helper"
This section provides a tutorial example on how to disable and remove 'PDF Link Helper' addon from Internet Explorer. 2016-10-25, 570👍, 2💬

💬 2016-10-25 Herong: Paul, can you share your solution?

💬 2016-10-24 Paul-H: This is stupid solution.

U2A00: Supplemental Mathematical Operators
This section provides a quick summary of the Unicode code point block: 'Supplemental Mathematical Operators', which contains 256 code points to represent additional mathematical operators 2016-10-24, 170👍, 1💬

💬 2016-10-24 ramulu: it is useful

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. 2016-10-24, 10779👍, 5💬

💬 2016-10-24 appu: thanks!

💬 2016-09-01 Shubham: well done.

💬 2016-02-18 saravanan: thanks

💬 2016-02-09 rajkumar: the given algorithm will be very useful........

💬 2015-09-21 prabha: good

Installing .NET Framework 4.6.1 SDK
A tutorial example is provided on how to download and install Microsoft .NET Framework 4.6.1 SDK, which can be used as the programming environment for C# language. 2016-10-23, 172👍, 1💬

Downloading and Running Flash Player Projector
This section describes a tutorial example on how to download and run Adobe Flash Player Projector to play Flash applications stored in SWF files without using Web browsers. 2016-10-21, 173👍, 1💬

"keytool" Importing CA's Own Certificate
This section provides a tutorial example on how to import CA's certificate generated by 'OpenSSL' into a 'keystore' file using 'keytool' 2016-10-20, 331👍, 2💬

💬 2016-10-20 Herong: Akhtar, AES256 encryption does not require any certificates. It requires a secret AES key, see Introduction to AES (Advanced Enc...

💬 2016-10-19 Akhtar: I have also a certificate file (.cer) .I did the same procedure to import in to mykey store and got .jks file but, now i want to...

Outdated Tutorials
This section describes 'adb push' and 'adb pull' commands, which allows you to copy files to and from the remote Android emulator or device. 2016-10-20, 153👍, 2💬

💬 2016-10-20 Herong: Peter, this tutorial is outdated, because it was based on the outdated SDK version: Android SDK R17. "push" and "pull" commands ...

💬 2016-10-19 peter chatterton: What do you mean by 'outdated'? Are push and pull impossible not or just unsupported? Great site BTW!! Because of the Dummies bo...

Windows 7: Disable Scheduled Tasks
This section provides a tutorial example on how to review tasks that have been scheduled to run on a Windows 7 system in the background and disable any unwanted tasks. 2016-10-20, 1097👍, 4💬

💬 2016-10-20 Herong: Branksome, your right panel is probably turned off. You can turn it on by clicking the last icon below the menu. You can also ac...

💬 2016-10-18 Branksome: On my Win7 system, there is no right panel with an option to delete. What I would prefer to do is reduce the schedule to run les...

💬 2016-03-30 Herong: David, There is a button on "Task Scheduler" to disable all of them. You should not allow any program to be scheduled on your ho...

💬 2016-03-23 David Betts: Hi, I was looking for a solution that disabled all tasks. However I can now find my way around the entries . I think I will leav...

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Android ASP Astrology Blowfish Built-in C# Calendar CD-DVD Chinese Cryptography DES Encoding Flash GB2312 General History Java JavaScript JDBC JSP JVM Movie Music MySQL Perl PHP Physics PKI Reference REST SOAP Sorting Swing UML Unicode VBScript Web-Services Windows WSDL XML XSD XSL-FO