Oracle Java SE is a programming language and gives customers enterprise features that minimize the costs of deployment and maintenance of their Java-based IT environment.
Oracle Java SE is well suited to long-running applications (e.g. servers). Java Swing (UI toolkit) is now rather outdated, lacking support for modern UI features. JavaFX, the potential replacement for Swing, has now been separated out of Java core. Ideally, there would be a path to migrate a large application incrementally from Swing to JavaFX, but due to different threading models and other aspects, it is difficult. At this point, it is probably better to use an embedded web browser (e.g. JxBrowser) to provide a modern UI in HTML/Javascript and keep just the business logic in Java.
If you are required to develop applications that are cross-platformed, Xamarin is a great tool to use. It will help save time and effort from your development team to be able to build applications seamlessly for android, IOS, Windows, and web on a single platform instead of requiring multiple tools to get the job done.
Xamarin allows you to write cross platform code. This allows companies to build apps more quickly by writing less code. Having code abstracted and reused across multiple platforms allows for more testing and less issues overall.
The ability to use Visual Studio is a huge plus. Visual Studio is one of the best IDE's available and being able to write cross platforms apps while in a great IDE makes everything less painful.
Xamarin is now free with a large company backing. This means that bugs on the platform get fixed more quickly and there is a large community of developers.
Commercial Licensing in 2019. Oracle will charge commercial organizations using Java SE for upgrading to the latest bug fixes and updates. Organizations will now need to either limit their implementation of Java SE or may need to drop it altogether.
Slow Performance. Due to the all of the abstraction of the JVM, Java SE programs take much more resources to compile and run compared to Python.
Poor UI appearance on all of the major GUI libraries (Swing, SWT, etc.). Through Android Studio, it is easy to get a native look/feel for Java apps, but when it comes to desktops, the UI is far from acceptable (does not mimic the native OS's look/feel at all).
Xamarin has been great for developing different projects efficiently and effectively. It's nice to reuse the core business logic across different platforms so that there are less to maintain and little replications are needed. The biggest benefit is that C# programmers do not have to learn a different language to do mobile development.
Oracle Java SE provides the new features along with timely security patches. New features like Record patterns and pattern matching for switches are very useful. With every new release of Java, it is getting better. Sequenced collections are also an interesting feature added to Java. With all these new features, backward compatibility is also maintained.
If you are required to develop applications that are cross-platformed, Xamarin is a great tool to use. It will help save time and efforts from your development team to be able to build applications seamlessly for android, IOS, windows, and web on a single platform instead of requiring multiple tools to get the job done
Java is such a mature product at this point that there is little support from the vendor that is needed. Various sources on the internet, and especially StackOverflow, provide a wealth of knowledge and advice. Areas that may benefit from support is when dealing with complex multithreading issues and security libraries.
I never had to contact support for any help. Most of the problems we ran into, we were able to identify and use peer support through blogs and other internet sources to resolve the problems. There are plenty of sources online which provide tutorials, discuss problems, etc. Example: StackOverflow
Just with any programming tasks, have a plan first. Design out the system, spend time to build it correctly the first time and have plenty of testing and user acceptance opportunities. Xamarin was easy to implement for a C# programmer. However, you need to do tutorials to realize the platform's capabilities.
Chose to go with Java instead of Python or C++ due to the expertise on the ground with the technology, for its ease of integration with our heterogeneous setup of production servers, and for the third party library support which we've found was able to address some challenging aspects of our business problem.
Xamarin runs natively on MacOS, and the debugger and other integration and auto-complete tools are far better than Eclipse for C# .NET. It also carries much of the plugin/add-on capabilities that are so desirable on Atom. Eclipse is a better for generalized software development, provided a developer is comfortable switching between the IDE the command line for certain parts of their workflow, like building, package management, or debugging. But for C# .NET development on MacOS specifically, Xamarin is the best product I've used for the job.
The different versions make it harder to work with other companies where some use newer versions while some use older versions, costing time to make them compatible.
Licenses are getting to be costly, forcing us to consider OpenJDK as an alternative.
New features take time to learn. When someone starts using them, everyone has to take time to learn.
