Predicate::not provides an easy way to negate predicate lambdas or method references, again reducing the boilerplate in our code. The factory methods also create unmodifiable collections, making them safer to use.Ĭollecting to unmodifiable collections is possible using the new Collector for Streams operations to put the results into an immutable collection. It’s not a fix-all for all readability problems, but using it at the right time can help the reader of the code focus on the business logic (whatit’s doing) rather than boilerplate (howit’s doing it).Ĭonvenience Factory Methods for Collections make it significantly easier to create collections like lists, maps and sets. Local-variable type inference ( var) is a nice example of syntactic sugar that helps reduce boilerplate code. I’ve picked out some key features developers have told me have made their lives easier when they’re working with the latest version of Java. Since Java 8 we’ve had plenty of new features, and also some new tools that can change the way we work. Learn more.Īs developers, we’re most interested in the new language features or APIs that come in each update to the language. Microsoft Azure supports your workload with abundant choices, whether you're working on a Java app, app server, or framework.
These changes may impact your application but there is a clear path to avoid these problems. APIs that are not core to the JDK have also been removed in Java 11. One of the changes from Java 9 was that internal APIs (largely those classes in packages that started with sun.misc.*) were hidden from use.Deprecation is being taken much more seriously in this modern Java world, and both Java 10 and Java 11 removed APIs.
Don’t be tempted to ignore compiler warnings.When choosing to upgrade the choice you face is whether to upgrade to the latest version of Java (12) and be prepared to upgrade every six months or upgrade to the latest LTS (11) to give yourself up to three years to think about your next upgrade.Since Java 8 a number of useful new language features have been introduced, along with new tooling, and performance improvements particularly for garbage collection.OpenJDK 64-Bit Server VM (build 17.0.4+8-Debian-1deb11u1, mixed mode, sharing) Install Java 17 (OpenJDK 17) on Debian 10/9 OpenJDK Runtime Environment (build 17.0. Update your list of packages and install wget.
The download the Java SE Development Kit 17 package. Then install the DEB package using the apt command: sudo apt install. Note, selecting 'jdk-17' instead of './jdk-17_linux-圆4_bin.deb' jdk-17_linux-圆4_bin.debĪgree to installation when prompted.
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