Java SE 9 Platform Umbrella JSR 379

Support for Oracle’s Solaris operating system (and SPARC CPUs) is dropped (while still available in e.g. Java 11). After the first Docker build, Reinhold remade the container but employed the new Java SE 9 tool JLink. “It’s an optional step, but it’s a very important one.” Using JLink, any of the 26 modules that the JDK has been divided into that aren’t used by the application get pruned away. The resulting recompilation using JLink created a new container that impressively tipped the scales at just under 39 megs. However, we at Romexsoft are always looking for tools that improve our daily work, help us write code better, faster, and less vulnerable.

Split packages occur when two or more members of a package are split over more than one module. To enforce reliable configuration a module is not allowed to read the same package from two different modules. The actual implementation is stricter, though, and two modules (no matter what kind of modules!) are not allowed to even contain the same package (exported or concealed). Also, JDeps suggests replacements for the internal APIs found. And in case you want to successfully migrate from Java 8 to Java 9 (and you do!), the JDeps tool will help you check whether your JAR files from the classpath are using the JDK internal APIs. An automatic module is a special type of named module that is automatically generated after placing a JAR file into the module path.

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And being able to move smaller Docker images across the network when updates happen or patches need to be applied will have a real, measurable impact on the performance of administrative and infrastructure tasks. The benefits of the Java SE 9 environment’s newfound modularity will assuredly reach far and wide. In the first case, you just have to make sure that your application runs on Java 9 without the creation of any modules. To do that, start with setting the JAVA_HOME environment variable to point to the JDK 9 installation, and then compile and run your application without implementing any changes in the code. This means you stay on the classpath and don’t use the module path at all.

• Until Java 8, every variable that had to be used within Try with Resources statements was required to be declared within the try statement.
• I stopped playing video games when Sony improved the gaming console so much that any time my Dig Doug died, I’d have to wait a minute and a half while the CD-ROM spun and the Fygars reloaded.
• During the development phase, new builds including enhancements and bug fixes were released approximately weekly.
• They are used to ease the migration of existing applications to Java 9 and to accomplish the backward-compatibility.

Although, during the migration from Java 8 to Java 9 the situation described will differ. Your code comes from the classpath which sets it into the unnamed module. To maximize compatibility, it’s not scrutinized and not all the described above module-related validations are applied. However, if you decided to modularize your application there’s no universal solution to repair the split package problem. Secondly, you should check your code for dependencies on the rt.jar and tools.jar files as both of them were removed in Java 9. As I promised, I am back with the code samples of my earlier article https://remotemode.net/become-a-java-developer-se-9/java-se-9/…

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Stay up to date with latest software releases, news, software discounts, deals and more. Java 5 was first available on Apple Mac OS X 10.4 (Tiger)[42] and was the default version of Java installed on Apple Mac OS X 10.5 (Leopard). Which is precisely when Oracle announced that the two new versions of Java are ready to roll. Version 9 of the Java development kit was supposed to ship on September 22, 2016, but delays and a dispute over the “Jigsaw” Java Platform Module System saw the release date pushed out to Thursday, September 21.

This makes the new language features worth the evaluation. In addition, we expect that various libraries and tools will soon begin to take advantage of Java 9 and after a while, the use of JDK 9 will become a necessity. Within the process of development, cyclic dependencies can be solved with the help of interfaces to decouple the linking between modules. This can be implemented using the Service Provider API and by applying Service consumers and Service providers.

Allow Effectively Final Variables to Be Used as Resources in Try with Resources

However, Oracle has stated that the JDK unsupported APIs will be removed in the next major JDK release. Therefore, adding the –add-exports option is just a temporary solution to make your code work and sooner or later you’ll have to replace them with the supported JDK APIs. It all depends on how long the unsupported JDK APIs that you’re using will remain in the JDK and will not be removed.

This is an introductory tutorial that explains the basic-to-advanced features of Java 9 and their usage in a simple and intuitive way. In Java 9 we are not required to create this local variable. With Java 9 Oracle introduced a new modularization system (project Jigsaw), that also has a massive impact on the JVM architecture (although, not so much on the language syntax). They had to https://remotemode.net/blog/tips-on-how-to-make-friends-when-you-work-from-home/ postpone the release of Java 9 two times because of disagreements on the implementation of that feature with other influential members of the Java community. Java 15 adds e.g. support for multi-line string literals (aka Text Blocks). The Shenandoah and Z garbage collectors (latter sometimes abbreviated ZGC) are now ready for use in production (i.e. no longer marked experimental).