Java 17 new featuresThe newest long-term support release for the Java SE platform is Java 17 LTS. Under the Oracle No-Fee Terms and Conditions License, JDK 17 binaries are free to use in production and redistribute at no cost. LTS stands for long-term support. It will be available on September 15, 2021. An Open LTS version of JDK17 is now available to create web and desktop applications. It includes development tools, a collection of libraries, a Java virtual machine, and other files. With each version, we observe new functions while keeping an eye on some of them being changed or removed. Without a monotonous perspective and periodic releases, it takes time to become acquainted with and grasp the operation of a newer one. Introduction of the JDK17 New Featuresall of us are crazy for significant changes in this version to induce workflow. Still, developers should be dissatisfied because there are no such big release upgrade version checks, as we observe in the JDK improvement proposal, usually referred to as JEPS, which is supplied below:
We believe there are no substantial markup changes in this version, but we are doing a deeper dig to understand them. Therefore we are categorizing them as follows:
First category: Nice developer-related features
Switch Pattern Matching (Preview) It makes switch statements and expressions more flexible and expressive by letting patterns appear in case labels. It also makes it possible to relax the switch's null-hostility when needed. There are two main patterns, which are as follows:
Generate sealed Classes Adds sealed classes and interfaces to the Java language to make it better. Sealed classes and interfaces limit other classes, and interfaces can extend and implement them, respectively. Showing some other progress to pattern matching along with the JEP 406 will make it possible to check the type, cast, and act code pattern more sophisticatedly and cleanly. Syntax: The following syntax generates a sealed class in the java 17 version Second category: Developer-specific information or featuresRestore or Rebuild the "Always-Strict Floating-Point" Semantics This JEP makes floating-point operations uniformly stringent and is primarily intended for scientific applications. Both default floating-point operations, strict or strictfp, provide the same outcomes for calculations using floating-point on every platform. Vector API (Second Incubator) The Vector API works with Single Instruction, Multiple Data / SIMD operations, which include multiple sets of instructions being processed concurrently. It uses specialized CPU hardware that provides vector instruction and enables the operation of these instructions as pipelines. The new API will consequently give programmers the ability to write more effective code. It makes better use of the capabilities of the underlying hardware. Deserialization Filters Based on Context (content-specific) The JDK 9 version makes it possible for us to verify receiving serialized data from untrusted sources, which is a frequent source of security problems. Applications can configure dynamically chosen and context-specific deserialization filters. Enhanced faster the "pseudo-Random" Number Generators It offers a new interface type and solutions for pseudo-random number generators to make using multiple PRNG algorithms simpler and properly support stream-based operations. JDK Internals Encapsulate strongly Since JEP 403 eliminates the flag -illegal-access, it signals a step toward strongly enclosing JDK internals. If the flag is present and the platform will disregard the flag, then the console will send out a message to stop using the given flag. Foreign Functions and Memory API (Incubator) Java programmers can retrieve code from outside the JVM. Thanks to the Foreign Function and Memory API, it controls memory outside of the heap. The intention is to replace the JNI API and enhance its performance and security over the previous version. Third category: Keeping current with Apple-related featuresNew macOS rendering pipelines This JEP makes a Java 2D internal processing pipeline for macOS since Apple removed the OpenGL API in macOS 10.14. The Swing GUI used the OpenGL API. Apart from the underlying engine, there were no modifications to the current APIs because the implementation uses the Apple Metal API. macOS/AArch64 Port Apple announced a long-term strategy to switch its computer line from X64 to AArch64. With the help of this JEP, the JDK may now run on macOS platforms with AArch64. Fourth category: Cleaning up various featuresDismiss the Applet API for Removal Most browsers will no longer support the applet API because it has been deprecated since JDK9. Activation of the Removal RMI RMI's use in the web technology of the previous ten years has rendered the RMI activation mechanism outdated. Removal of the Experimental AOT and JIT Compiler Take out the trial versions of the java-based AOT (ahead-of-time) and JIT (just-in-time) compilers. Remove the Security Manager. Reject the Security Manager so it can be taken out in a later update. Java 1.0 version starts Security Manager. For several years, it was never the main method of protecting client-side code. The following syntax helps to remove the security manager with annotation. ConclusionJava17 creates multiple features for the users and developer. It creates complicated web-based and java based applications easily. There are multiple feature inserts and removes for better development.
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