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"instanceof" Operator - Determining Object Type
This section provides a quick description of the 'instanceof' operator. A tutorial example is provided on how to use the 'instanceof' operator to determine what is the type of an object, and its parent types.
2018-08-06, 828👍, 1💬

💬 2018-08-06 esor: nice

java.util.Locale - Localization and Internationalization
This section provides a tutorial example on how to use java.util.Locale class to verify the default locale and list all supported locales. A locale is an identification of a combination of human language and country.
2018-08-01, 5464👍, 4💬

💬 2016-12-25 Herong: jfseb, thanks for pointing out this difference.

💬 2016-12-19 jfseb: Note that java locales do not correspond in all versions to ISO 639. e.g. hebrew is now he, not iw. https://en.wikipedia.org/wik...

💬 2016-05-06 Scrijna: P.S. It's also useful for Java, iOS and Windows localization, as it supports most popular localization formats.

💬 2016-05-06 Scrijna: For Android app localization, you could try using the localization tool https://poeditor.com It's useful for collaborative trans...

Shift-JIS Encoding
This section provides a quick introduction of Shift-JIS, also called MS Kanji, encoding, which maps a JIS X0208 character to a 2-byte sequence using a complicated schema designed by Microsoft.
2018-07-31, 259👍, 2💬

PDF Printing Version
Information on how to obtain the PDF version of this book for printing.
2018-07-26, 695👍, 2💬

💬 2018-07-26 Dustin Baker: Good book

💬 2015-08-04 Nikos: thanks

DESSubkeysTest.java - DES Key Schedule Algorithm Illustration
This section provides a tutorial Java program, DESSubkeysTest.java, to illustrate how DES key schedule algorithm works.
2018-07-20, 530👍, 2💬

💬 2018-07-20 aqil: havr fun

Saving Files in "Unicode (UTF-8)" Option
This section provides a tutorial example on how to save text files with Nodepad by selecting the 'Unicode (UTF-8)' encoding option on the file conversion dialog box.
2018-07-17, 1148👍, 2💬

💬 2018-07-17 Me: Very good, but Unicode (nothing else) worked for me!

💬 2016-10-08 shital p: it's works fine for me thank u

.MPG File Name Extension - MPEG Files
This section describes what is .mpg file name extension for MPEG (Moving Picture Experts Group) file.
2018-07-13, 340👍, 2💬

💬 2018-07-13 Ibrahim hanif: Thanks for the useful information.

💬 2017-04-02 Mohamed: ok

"OpenSSL" Signing CSR Generated by "keytool"
This chapter provides tutorial notes and example codes on using 'OpenSSL' to act as CA (Certificate Authority). Topics include setting up 'OpenSSL' as CA; using 'keytool' to generate CA private key; using 'keytool' to generate CSR (Certificate Signing Request); using 'OpenSSL' to sign CSR, using 'ke...
2018-07-12, 144👍, 1💬

"openssl pkcs12" Merging Key with Certificate
This section provides a tutorial example on how to merge a private key and its self-signed certificate into a single PKCS#12 file, with can be then encoded as PEM and encrypted with DES.
2018-07-07, 146👍, 1💬

Installing Axis 1.2.1 on Windows
This section describes a tutorial on how to install Axis 1.2.1 on a Windows system.
2018-07-05, 156👍, 1💬

💬 2018-07-05 Mike: Thanks!

Outdated: "HijackThis" - Spyware and Browser Hijacker Detector
This section provides a tutorial example on how to run 'HijackThis' to generate a system diagnose report.
2018-07-01, 148👍, 2💬

💬 2018-07-01 Herong: Dragokas, Thanks for maintaining this nice tool. I will definitely try the new version.

💬 2018-06-29 Dragokas: Just for information: There is a new version named: HiJackThis Fork v3: https://github.com/dragokas/hijackth isthat supports all...

"keytool" Importing Certificates in DER and PEM
This section provides a tutorial example on how to use 'keytool' to import certificates in DER and PEM formats generated by 'OpenSSL' into 'keystore' files.
2018-06-28, 13449👍, 2💬

💬 2016-04-01 MM: Thank you, this is very helpful.

Garbage Collection Logging Options
This section describes HotSpot JVM options to generate garbage collection log messages. '-XX:+PrintGCDetails' and '-XX:+PrintGCDateStamps' are two most important options.
2018-06-24, 157👍, 1💬

💬 2018-06-24 Tina: This is useful.

💬 2018-04-23 Don: Thanks for the detailed explanation!

Garbage Collection Logging Options
This section describes HotSpot JVM options to generate garbage collection log messages. '-XX:+PrintGCDetails' and '-XX:+PrintGCDateStamps' are two most important options.
2018-06-24, 157👍, 1💬

💬 2018-06-24 Tina: This is useful.

💬 2018-04-23 Don: Thanks for the detailed explanation!

Java Exception: "java.lang.OutOfMemoryError: Java heap space"
This section provides a tutorial example on how JVM expands the Heap space to allocate more objects and leads to the 'java.lang.OutOfMemoryError: Java heap space' Java exception, if it is not allowed to expand any more.
2018-06-24, 164👍, 1💬

💬 2018-06-24 Maria: Cool!

💬 2017-08-10 xionghongzhi: awsome artical!!!!!! thx!!!

Java Exception: "java.lang.OutOfMemoryError: Java heap space"
This section provides a tutorial example on how JVM expands the Heap space to allocate more objects and leads to the 'java.lang.OutOfMemoryError: Java heap space' Java exception, if it is not allowed to expand any more.
2018-06-24, 164👍, 1💬

💬 2018-06-24 Maria: Cool!

💬 2017-08-10 xionghongzhi: awsome artical!!!!!! thx!!!

Introduction to Web Service
This chapter provides a quick introduction on Web services and related technologies.
2018-06-18, 1384👍, 5💬

💬 2018-06-18 Poonam: Books are necessary.

💬 2017-03-30 ravi: This is to learn web services

💬 2015-12-13 A: Useful

Bitcoin Tutorials - Herong's Tutorial Notes
This free book is a collection of tutorials and notes on Bitcoin and blockchain.
2018-06-17, 759👍, 2💬

💬 2018-03-07 Neil Shrestha-Birtch: Awesome stuff again! I want to build my skills to be a Core dev one day!

💬 2018-02-16 Cindy: Very good for beginners!

Scripting Runtime DLL Library Overview
This section describes the Scripting Runtime DLL library, scrrun.dll, which offers Dictionary objects to store pairs of keys and values. scrrun.dll also offers FileSystemObject objects for you to manage local file systems.
2018-06-17, 328👍, 2💬

💬 2018-06-17 Herong: Julianna, Can you just terminate the script process with Task Manage?

💬 2018-06-14 Julianna: how to stop a running scrip on window 10?

What Is ASCII?
This section provides a quick introduction of ASCII (American Standard Code for Information Interchange) character set and encoding.
2018-06-15, 184👍, 1💬

💬 2018-06-15 z: Thanks

64-bit RSA Key Validated by RsaKeyValidator.java
This section provides a tutorial example on how a 64-bit RSA key is validated by RsaKeyValidator.java with 3 rounds of encryption and decryption tests.
2018-06-09, 254👍, 2💬

💬 2018-06-09 Herong: Adrian, you are welcome!

💬 2018-06-09 Adrian: I needed in rush working 64-bit keys. You helped me a lot. Thanks! :D

What Is "leader" Formatting Object?
This section describes 'leader' formatting object, which is an inline-level formatting object that generates an inline area with flexible width with a repeating pattern to fill gaps between other inline areas.
2018-06-09, 232👍, 2💬

💬 2018-06-09 Herong: vik, a fill-in-the-blank form is just a normal PDF page created as an application form blank fields for people to fill in. The "...

💬 2018-06-08 vik: nice explanation and example. Could you please give an example for creating entry fields in fill-in-the-blank forms?

Printable Copy - PDF Version
Information on how to obtain the PDF version of this book for printing.
2018-06-09, 1831👍, 9💬

💬 2018-06-09 Herong: Sake, I think you can create a good MP3 Player with Java Swing.

💬 2018-06-02 sake: It can make advanced mp3Player whith java swing?

💬 2018-05-12 george: java

💬 2016-03-22 Herong: Keval, I will try my best. ☺

💬 2016-03-21 Keval: Please share more knowledge of java!

(More comments ...)

Microsoft JDBC Driver for SQL Server - sqljdbc42.jar
This chapter provides tutorial notes on sqljdbc42.jar, JDBC Driver 4.2 produced by Microsoft for SQL Server 2014. Topics include downloading and installing Microsoft JDBC Driver 4.2; loading sqljdbc42.jar; creating a connection to SQL Server with port number, instance name and database name; closing...
2018-06-06, 10447👍, 22💬

💬 2018-06-06 khui: thanks

💬 2018-01-07 jesse: thx

💬 2017-11-30 lebronjames: curry good

💬 2017-10-17 suku: hi

💬 2017-10-11 raghu: thanks

(More comments ...)

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