Design Patterns
Codename One
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Design Patterns | Codename One | |
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45 | 88 | |
86,355 | 1,642 | |
- | 1.4% | |
9.3 | 8.5 | |
1 day ago | 2 days ago | |
Java | Java | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Design Patterns
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I have been following the mooc java-1 from few days and i am on part-3 i want to ask some questions
After that, more practice, and then Design Patterns (as in the famous book of the "Gang of Four": "Design Patterns: Elements of Reusable Object Oriented Software"). Here I'd recommend "Head First: Design Patterns" and Java Design Patterns as well as Refactoring Guru (the sites are more reference than course).
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I made java roadmap website! Any feedbacks welcome!
For Design Patterns - any resource recommendation that misses Java Design Patterns and Refactoring Guru (also for Refactoring) as well as *Head First: Design Patterns, has failed.
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How do you structure code?
A massive list of design patterns and how they could be implemented (in Java) can be found here.
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Resources to learn how to create a 2D game engine with CPU rendering.
https://java-design-patterns.com/ has example code for things like object pools that can help with memory management.
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What are some book recommendations that don't require a specific language.
Sidenote: I would not really use the GoF Design Patterns book anymore. Too dry. I would use "Head First: Design Patterns" - much more modern, much easier to read, or Refactoring Guru or Java Design Patterns (uses Java, but again, only for illustrations).
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I want to get a book on design patterns. Would you recommend the GOF book or the Head First design patterns one?
Also: https://java-design-patterns.com and https://refactoring.guru/design-patterns
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How is an Observer pattern possible?
Use either Java Design Patterns or Refactoring Guru. Both resources are far higher quality than yours.
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Are there any quick videos/articles/resources that go over stuff not explicit taught in University?
Java Design Patterns
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Learn design pattern !
Java Design Patterns - IMO one of the most accessible sites with very easy explanations
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What are the Java design patterns suitable for the below functions in an E-commerce application?
A hint: go to Java Design Patterns and go through the patterns to figure what could fit.
Codename One
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A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev
codenameone.com — Open source, cross-platform, mobile app development toolchain for Java/Kotlin developers. Free for commercial use with an unlimited number of projects
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Android Play Billing Needs updating
This was resolved in this issue: https://github.com/codenameone/CodenameOne/issues/3706
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Backward Compatibility, Go 1.21, and Go 2
Naturally depends on the use case, yet they work good enough to be in business for 20 years.
https://www.ptc.com/en/products/developer-tools/perc
https://www.aicas.com/wp/products-services/jamaicavm-tools/
Android 5 & 6 (only changed back into JIT/AOT due to long compile times), https://www.infoq.com/news/2014/07/art-runtime/
Unfortunely the best well known, Excelsior JET, is no longer in business, most likely due to GraalVM and OpenJ9 being available as free beer, while PTC, Aicas Codename One are safe in their domains.
There is also RoboVM (https://github.com/MobiVM/robovm) as free beer, however it actually started as a commercial product, and the acquisition from Xamarin kind of stagnated it (naturally).
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Can't Reproduce a Bug?
At Codename One, we were using App Engine when our daily billing suddenly skyrocketed from a few dollars to hundreds. The potential cost was so high it threatened to bankrupt us within a month. Despite our best efforts, including educated guesses and fixing everything we could, we were never able to pinpoint the specific bug. Instead, we had to solve the problem through brute force.
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Mobile Apps with Java
We don't use GraalVM since our project was developed prior to its existence and we aimed for deeper native integration than it can offer: https://github.com/codenameone/CodenameOne
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Developing cross platform mobile application [closed]
XMLVM, Codename One and iSpectrum (cross compile Java code from an Android app or creating one from scratch
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Apple Offer Codes
I suggest filing an RFE in the issue tracker.
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Play Billing Library Version Deprecation
Thanks. It's always good to get another reminder. Yes, it was reported. u/shannah78 is working on this but we have time until November.
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Problems compilint to android side
please check this issue https://github.com/codenameone/CodenameOne/issues/3686
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The Holy Grail of Java Performance
We use ParparVM which we wrote. It compiles a subset of Java 8 (sort of) to native by translating the bytecode to C and passing that through XCode. The reason we took this path and not the path of "direct to native", is that it allows for future compatibility.
What are some alternatives?
Togglz - Feature Flags for the Java platform
Multi-OS Engine - Multi-OS Engine: Create iOS Apps in Java (or Kotlin ... etc.)
Modern Java - A Guide to Java 8 - Modern Java - A Guide to Java 8
J2ObjC - A Java to iOS Objective-C translation tool and runtime.
FF4J - Feature Flags for Java made easy
sitemapgen4j - SitemapGen4j is a library to generate XML sitemaps in Java.
failsafe - Fault tolerance and resilience patterns for the JVM
Maven Wrapper - The easiest way to integrate Maven into your project!
CQEngine - Ultra-fast SQL-like queries on Java collections
BoofCV - Fast computer vision library for SFM, calibration, fiducials, tracking, image processing, and more.