Ethereum Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial examples on Ethereum and blockchain. Topics include include: What is Ethereum; What is blockchain; Ethereum market value; What is Go Ethereum (Geth); Running a private Ethereum network with Geth; What is Ethereum Mist wallet; What is MetaMask wallet; Ethereum mi... 2022-07-10, 3454👍, 4💬
Java Tutorials - Herong's Tutorial Examples
This tutorial book is a collection of notes and sample codes written by the author while he was learning Java himself. Topics covered in the book include: Java language basics; execution environment; generic classes and parameterized type; generic methods and type argument inferences; enum types and... 2022-07-22, 7885👍, 9💬
XML Tutorials - Herong's Tutorial Examples
This XML tutorial book is a collection of notes and sample codes written by the author while he was learning XML himself. Topics include introduction to XML, DTD (Document Type Definition), XSD (XML Schema Definition), XPath (XML Path Language), XSL (Extensible Stylesheet Language), XSLT (XSL Transf... 2022-07-22, 10435👍, 3💬
Python Tutorials - Herong's Tutorial Examples
This Python tutorial book is a collection of notes and sample codes written by the author while he was learning Python language himself. Topics include: installing Python environments on Windows, macOS and Linux computer; Python built-in data types; variables, operations, expressions and statements;... 2022-07-21, 116👍, 1💬
EC Private and Public Key Pair
This section introduces what is EC (Elliptic Curve) key pair - a pair of private key and public key constructed from a given subgroup generator in a given elliptic curve group. 2022-07-11, 606👍, 2💬
Live Examples of Web Services
A collection of Web service examples for WSDL 1.1, WSDL 2.0, SOAP 1.1, SOAP 1.2, with XML document and RPC message styles: "Hello" Web Service "Hello_REST" - REST Web Service "Registration" Web Service - WSDL 1.1 and SOAP 1.2 "Reservation" Web Service - WSDL 1.1 and SOAP 1.2 "RefillOrder" Web Servic... 2022-07-08, 3413👍, 2💬
Using openConnection() Method in java.net.URL Class
This section provides a tutorial example on how to use the openConnection() method in the java.net.URL class to perform a GET method on an HTTPS server. Java Secure Socket Extension (JSSE) works quietly behind the java.net.URL class to provide HTTPS support. 2022-07-08, 5725👍, 3💬
"keytool -export/import" - Exporting and Importing Certificates
This section provides a tutorial example on how to use the 'keytool -export' command to export certificates out of a 'keystore' file. The 'keytool -import' command can be used to import certificates into a 'keystore' file. 2022-07-08, 32099👍, 2💬
OpenSSL "enc -bf-cbc" for Blowfish/CBC Encryption
Tutorial notes and example codes are provided OpenSSL 'enc -bf-cbc' command for Blowfish encryption in CBC mode. Topics include introduction of CBC (Cipher Block Chaining) cipher operation mode; Literal Key options to specify secret key and IV directly; Salted Key and Random Salt options to specify ... 2022-07-08, 2116👍, 2💬
Discontinued: GetCitiesByCountry - Get Cities by Country
This chapter provides a quick introduction of the free Web service, GetCitiesByCountry, returning a list of all cities of a given country. Topics include usage description of GetCitiesByCountry; request message sample; response message sample. 2022-07-08, 5094👍, 5💬
HTTPS Communication Data Encryption
This section describes the HTTPS communication data encryption process - Browser generates an encryption key, encrypts it using server public key and sends it to the server; Browser encrypts data with the encryption key; Server encrypts return data with the same encryption key. 2022-07-05, 196👍, 3💬
Free Chinese Calendar 2023 - Year of the Rabbit
Want to know when is the 2023 Chinese New Year day? Look for free Chinese calendars for 2023? Chinese New Year Date for Year 2023 The Rabbit2023January 22SundayChinese New Year ⇒ Free Chinese Calendar 2024 - Year of the Dragon ⇐ Free Chinese Calendar 2022 - Year of the Tiger ⇑ Chinese New Year Da... 2022-07-03, 31155👍, 1💬
Tutorial Books on Software Programming Android Tutorials - Herong's Tutorial Examples ASP Tutorials - Herong's Tutorial Examples C# Tutorials - Herong's Tutorial Examples Data Encodings - Herong's Tutorial Examples Flash Tutorials - Herong's Tutorial Examples Free Web Services - Herong's Tutorial Ex... 2022-07-03, 11985👍, 0💬
Private Network ID Must Match "chainId"
This section describes the requirement on private network - the network ID must match the 'chainId' given in the genesis block configuration. 2022-06-28, 145👍, 1💬
Exporting a List of Root CA Certificates
This section provides a tutorial example on how to export a list of trusted root CA certificates with the certificates console on a Windows system. 2022-06-28, 2321👍, 3💬
serialver - serialVersionUID Generator
This chapter provides provides a tutorial example on how to use 'serialver' command to generate a unique 'serialVersionUID' value for any given serializable Java class. 2022-06-27, 250👍, 1💬
全世界有哪些新冠疫苗？ 到2021年1月为止，全世界有5款新冠疫苗获得不 同国家批准上市。下面是全世界新冠疫苗一览表： 代号 种类 ...
"Hello" is an XML document based Web service for testing purpose only. High level information about ...
This section describes the third zodiac sign, Gemini, the Twins.
When is the Chinese Mid Autumn Festival? How is it celebrated? What are the traditions? Mooncake Fes...
This section describes what is a digital signature and what is the process of generating and verifyi...