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Jul 2, 2023 · Java 10: Introduced features like local variable type inference (var keyword) and the experimental garbage collector (Epsilon), enhancing code conciseness and providing performance testing ...
- Local-Variable Type Inference
- Immutable Collections
- Optional.Orelsethrow
- Time-Based Release Versioning
- Parallel Full GC For G1
- Application Class-Data Sharing
- Experimental Java-Based Jit Compiler
- Other Changes in Java 10
- Conclusion
Since Java 10, we can use the keyword var to declare local variables (localmeans: within methods). This allows, for example, the following definitions: For comparison – this is how the definitions look in classic notation: To what extent you use varwill probably lead to lengthy discussions in many teams. I use it if it is a) significantly shorter a...
With the methods Collections.unmodifiableList(), unmodifiableSet(), unmodifiableMap(), unmodifiableCollection()– and four further variants for sorted and navigable sets and maps – the Java Collections Framework offers the possibility to create unmodifiable wrappers for collection classes. Here is an example: If we now try to add an element via the ...
Optional, introduced in Java 8, provides the get() method to retrieve the value wrapped by the Optional. Before calling get(), you should always check with isPresent()whether a value exists: If the Optional is empty, get() would otherwise throw a NoSuchElementException. To minimize the risk of an unintended exception, IDEs and static code analysis ...
After the version format was (finally) changed from the somewhat cryptic 1.8.0_291 to a much more readable 9.0.4 from Java 8 to 9, JEP 322added the release date in Java 10 – and for Java 11, an "LTS" (Long-Term Support) in advance. The command java -versionreturns the following answers in Java 8 to 11: Java 8: Java 9: Java 10: Java 11: To date, the...
With JDK 9, the Garbage-First (G1)garbage collector has replaced the parallel collector as the default GC. While the parallel GC could perform a full garbage collection (i.e., cleaning up allregions of the heap) in parallel with the running application, this was not possible with G1 until now. G1 had to temporarily stop the application ("stop-the-w...
Since many Java developers are not familiar with it, I would like to briefly digress and explain class-data sharing(without the "application" prefix).
Since Java 9, the Graal Compiler (a Java compiler written in Java) has been supplied as an experimental Ahead-of-Time (AOT) compiler. This allows a Java program to be compiled into a native executable file (e.g., an exe file on Windows). In Java 10, JEP 317created the possibility of using Graal also as a just-in-time (JIT) compiler – at least on th...
This section lists those Java 10 features that I don't think every Java developer needs to know about in detail. On the other hand, it doesn't hurt to have heard of them at least once. :-)
With var, immutable collections, and Optional.orElseThrow(), Java 10 has provided us with some helpful new tools. The G1 garbage collector now works almost entirely in parallel. And with Application Class-Data Sharing, we can further speed up the start of our application and reduce its memory footprint. If you feel like experimenting, you can activ...
Sep 22, 2023 · Since the release of version 8, up to version 21, Java is shaped by 232 JDK Enhancement Proposals (JEPs) and many more smaller updates, each of which brings some improvement to the platform. This page is a categorized and curated list of the most important improvements.
Dec 7, 2020 · This blog will give you samples of awesome new feature added since Java 7. I’ll showcase at least one major improvement for each Java version, all the way to Java 15 which was released in fall 2020. Java now fully supports lambdas, functional programming, type inference via var, immutable collections with simple constructors, and multi-line ...
Jan 11, 2024 · Experimental and Preview Features. This section lists experimental features and previews, i.e., functionality that are still in the development stage and may be modified based on feedback from the Java community until the final release.
Apr 19, 2024 · Learn about the different version history of Java and its features. This page covers all versions from JDK 1 to the latest Java 22 release.
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Another preview feature introduced in Java 12 is pattern matching for instanceof. In previous Java versions, when using, for example, if statements together with instanceof, we would have to explicitly typecast the object to access its features:
