Codetown
Codetown ::: a software developer's community
Codetown is a software developer's community. It's a technical networking and educational group focused on software development.
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JavaSpecialists
Issue 273 - Truly Public Methods
Class.getMethods() returns all the public methods in this class and the classes in its ancestry. However, we cannot necessarily call these methods, for example if they are declared in a private inner class or a lambda. In this newsletter we attempt to find all truly public methods.Issue 272 - Hacking Enums Revisited
In a previous newsletter, we looked at how we could dynamically add new enums and also rewire affected switch statements. Due to improvements in Java security, our old approach needs to be updated for Java 12.Issue 271 - HttpClient Executors
Java 11 added the HttpClient to give us a better way to send HTTP requests. It supports asynchronous and synchronous mode. HTTP2 comes out of the box. The threading is a bit funky though and Professor Cay Horstmann explores how things work underneath the covers.Issue 270 - Excursions into Deduplication
When are Strings deduplicated? How can we find out whether they are of any benefit in our application? How much does it cost in terms of CPU? We try to show you how we can get this from the deduplication statistics provided by the JVM.Issue 269 - Heterogeneous Comparisons
The compareTo() function has three rules. Break any one of them and you might get an exception when you sort. In this newsletter we explore what these rules are and how they can affect sorting.Birthdays
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Events
January 23
Thursday
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OrlandoJUG ::: JPA 2.1 Entity Graphs in Spring Data with Richard
January 23, 2020 from 6pm to 8pm – Starter Studio
Join us for a talk featuring Richard Thibault Richard Thibault is a full-stack web and mobile developer with over 25 years of experience in the software industry. He is currently focused on Java a…
Organized by Michael Levin | Type: meetup
Blog Posts
How to Build an Image Crawler Without Coding
Posted by erika fu on October 9, 2019 at 9:08pm 1 Comment 0 Likes
Saving an image from the webpage is straightforward. Simply right-click and select "save image as". But what if you have hundreds or even thousands of images that need to be saved? Will the same trick work? At least not for me!
In this article, I want to show you how to quickly build an image crawler with ZERO codings. Even if you have absolutely no tech background, you should be able to nail this within 30 mins. So for whatever reasons you may need…
ContinueMobile Vendor Market Share
Posted by Ismail Jones on September 17, 2019 at 11:09pm 0 Comments 0 Likes
IBM is moving OpenPower Foundation to The Linux Foundation
Posted by Michael Lucas on August 22, 2019 at 8:18am 0 Comments 1 Like
Swampcast features Tim Westergren, Pandora CEO
Posted by Michael Levin on August 3, 2019 at 12:30pm 0 Comments 0 Likes
Join Michael Levin in this Swampcast interview with Tim Westergren, Pandora CEO. Click here to listen. Photo…
Next OJUG and GatorJUG Meetings will be fabulous - Check out the Codetown Events
Watch for details on our upcoming meetings. OrlandoJUG meeting's fall on the 4th Thursday of every month, in case you want to mark your calendars. Stay tuned for details! GatorJUG meets the 2nd Wednesday of every month.
The details are posted in the CodeTown Events section. Please RSVP so we'll know how much pizza to order. Stay tuned! ...Mike
Groups
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OrlandoJUG Town
95 members
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Spring Town
48 members
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Jobs
75 members
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GatorJUG Town
30 members
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Android Town
35 members
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Kotlin Town
6 members
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Coding Dojo
6 members
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Java SE Town
14 members
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Python
15 members
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Freelance Village
11 members
Forum
Octoparse: the best web scraping solution
About several years ago, when came up with Crawler, Web scraping, Data Capturing, people can't help imaging that a programmer is coding in front of a computer. However, today, things are changing and everyone can capture the data they want on their…Continue
Tags: webscraping, crawler
Started by erika fu in Trends Oct 9.
Be Careful What You Wish For
Interesting. Ask Elon Musk what scares him…Continue
Tags: Braintree, PayPal, kernal, google, neuralink
Started by Michael Levin in AI, ML & Big Data Aug 8.
Java books for any library 5 Replies
What books should be on the bookshelf of EVERY Java programmer, no matter what specific technologies they are working on?The two that come to my mind areThinking in JavaJava Concurrency in PracticeWhat else am I missing?Continue
Started by David Moskowitz in Java. Last reply by sneha gulati Feb 8.
Error trying to use Fragment
I am new to Android. I have been working thru some examples in a book called Head First Android Development. I entered a small program using fragments and get a Casting Error.cannot cast andoid.app.fragment to…Continue
Tags: Fragment
Started by Robert Sobol in Java Oct 10, 2017.
Fragment Syntax Problem
My name is Rob Sobol.I have been working through a book called Head First Android Development.I hit a syntax error in a simple exercise that uses one fragment. I have been trying to figure out the error for days. I am hoping some in the forum can…Continue
Tags: Fragments
Started by Robert Sobol in Java Oct 10, 2017.
Hadoop getting old?
An article just came out in InfoWorld about trends, which is always an interesting subject. Funny, they said Hadoop wasn't hot. Spark is. It's a good read. …Continue
Tags: codetown, infoworld, programming, hadoop, trends
Started by Michael Levin in Trends Apr 10, 2017.
What's functional programming, anyway?
Can you believe people are still trying to come up with a good definition or explanation of what functional programming is? Paul Krill is a journalist with InfoWorld. Here's an article he just wrote: …Continue
Tags: functions., codetown, lambdas, clojure, programming
Started by Michael Levin in Functional Programming Feb 21, 2016.
Santafe College 2 Replies
Santafe just added a new BAS bachelor's program of study. 5651 ProgrammingContinue
Started by Dan Lackey in Dynamic Languages. Last reply by Michael Levin Feb 15, 2016.
Using SQL with Node,.js 1 Reply
All the tutorials and books for node.js seem to use Mongo as the database. I am not sold on 'document' databases and would like to know how difficult it is to use any version for plain old tried-and-true SQL with Node.js.Does anybody have any…Continue
Tags: 'document, databases', SQL, node, node.js
Started by Kevin Neelands in Dynamic Languages. Last reply by Lou Caudell Nov 10, 2015.
The advantages of a RESTfull web-based API 5 Replies
I need to get a better handle on the advantages of a RESTful web-based API. People tell me they scale better than other methods, but I don't see how they reduce database access or have any other feature that helps handle large amounts of traffic.…Continue
Tags: API', 'web-based, RESTful
Started by Kevin Neelands in Dynamic Languages. Last reply by Kevin Neelands Oct 25, 2015.
Latest Activity
October OJUG
erika fu commented on erika fu's videoCreate your first scraper within minutes with Octoparse
erika fu posted a discussionOctoparse: the best web scraping solution
erika fu commented on erika fu's blog post How to Build an Image Crawler Without Codingerika fu posted a videoCreate your first scraper with Octoparse 7 X (Updated)
Google's Deep Mind Explained! - Self Learning A.I.
Google's Deep Mind Explained! - Self Learning A.I.
Camila Aug commented on Paul Black's blog post Octoparse vs. Import.io comparison: which is best for web scraping?Live OrlandoJUG broadcast tonight
Live OrlandoJUG broadcast tonight
OrlandoJUG Town
Spring Town
OrlandoJUG ::: JPA 2.1 Entity Graphs in Spring Data with Richard at Starter Studio
Happy 10th year, JCertif!
Notes
Welcome to Codetown!
Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.
Created by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.
Looking for Jobs or Staff?
Check out the Codetown Jobs group.
There's also a free Java Jobs mailing list. It's a Yahoo group so you have to create a Yahoo account to use it.
InfoQ Reading List
CircleCI Adds Security Integrations to Streamline Securing CI/CD Pipelines
CircleCI announced the addition of new orbs that address common use cases and needs with securing your CI/CD pipelines. The orbs added to the repository with this release cover vulnerability scanning, secrets management, license scanning, and digital scanning. It includes integrations with AWS and Google Cloud.
By Matt CampbellMini book: The InfoQ eMag: Remote Meetings
Working remotely is becoming routine. Our goal in this eMag is to help you do things better. We’ll show how people all over the world worldwide are successfully facilitating complex conversations, remotely. We’ll also share practical steps you can take right now, to upgrade the remote conversations that fill your working days.
By InfoQPresentation: Making a Lion Bulletproof: SRE in Banking
Robin van Zijll and Janna Brummel talk about the history, present and future of ING’s SRE team and practices. They touch upon people (hiring, coaching, organizational aspects, culture), process (way of working, education), technology (observability, infrastructure), and share lessons learned that can be applied to any organization starting or growing SRE, financial or not.
By Robin van Zijll, Janna BrummelPresentation: Building a High-performance Networking Protocol for Microservices
Robert Roeser and Arsalan Farooq talk about how techniques used in Fintech and Adtech – such as zero copy, flyweights, composite buffers, pooled memory, shared memory transport, direct memory in languages like Java – can be used to improve performance in distributed applications.
By Robert Roeser, Arsalan FarooqArticle: The Current and Future State of Testing: a Conversation with Lisa Crispin
Lisa Crispin talks about the current and future state of testing, how testing works in agile environments, the value testers bring to DevOps, testing machine learning and where testing is headed. Testing is a communication activity and communication skills are vital to successfully leveraging testing skills and knowledge in modern software development.
By Xiaoqian Geng, Lisa Crispin
© 2019 Created by Michael Levin.
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