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Exciting New Features In Java 9

In September, Oracle released Java SE 9 with more than 150 new features. The latest version of the widely used language comes with several new features and APIs to improve software development for both large and small devices. At the same time, the features provided by Java 9 enable developers to improve performance, security, and maintainability. Therefore, it becomes important for programmers to understand some of the key features offered by Java 9.

What Should Developers Know About Java 9?

Module System

Developers can now use Better Support for HTML5 and JavaScript to split the JDK into multiple modules. Each JAR file contains a module descriptor. Developers can define dependencies between different modules through requirements. Modularity makes it easy for programmers to run JVM modules efficiently on smaller devices that don’t have extra memory. At the same time, they can also run APIs and JVM modules that are required by the application.

Advanced Design

Java 9 streamlines the code integration process significantly through runtime execution (AOT). Developers can leverage AOT integration to generate Java classes into native code even before the system executes them. AOT integration improves the performance of both large and small production processes by addressing critical bottlenecks in just-in-time (JIT) integration. Unlike JIT integration, AOT integration ensures that no Java process remains uncompiled.

Real-Eval-Print-Loop tool

Java 9 comes with a new real-eval-print-loop (REPL) line tool – Shell. The shell is designed to have an interface so that it can highlight text and text interactively. A programmer can use Shell to check the quality of Java code before compilation. They can just upload a piece of code and collect comments. The shell can also end tabs and add only the necessary semicolons. The new REPL tool makes Java compete with widely used languages ​​such as Python and Scala.

Better HTML5 and JavaScript support

The Javadoc management tool provided with Java 9 has the ability to generate HTML5. Also, the latest version of the programming language supports several new characters, blocks, and scripts as part of the Unicode 8.0 encoding standard. At the same time, Java 9 comes with a streamlined and lightweight JavaScript engine that makes it easier for programmers to embed JavaScript in Java applications. Developers can improve the parsing of ECMAScript code in various IDEs and frameworks directly with the parser API of Nashorn’s ECMAScript syntax tree provided by the JDK.

Straightforward API

When writing Java code, programmers use strings to define calculations. Java 8 supports stream processing by providing the Streams API. Java 9 comes with a streamlined version of the Streams API that enables developers to retrieve and drop objects from a Stream based on the context of the stream by adding methods. Also, the streamlined Streams API was designed with features to create a cost-effective and reproducible stream of Stream objects.

Multi-Resolution Image API

Java 9 introduces a new feature – MultiResolutionImage – to create a single image with multiple resolutions by combining multiple images with different resolutions. Developers can also use the Multi-Resolution Image API provided by Java 9 to get different resolutions of a single image. Also, they can use the API to select a specific image based on the required decision. Therefore, Java programmers can now use a single API to create a unified multi-dimensional image and access different types of images.

http://2 client API

Java 9 completely changed the way applications make HTTP calls. It replaces the HttpURLConnection API with the HTTP client API. The HTTP client API supports both http://2 and WebSockets. However, the API is currently not part of Java SE. It is implemented as part of the incubator which resides under the jdk.incubtor namespace. But the HTTP client API supports modern communication methods, while overcoming the shortcomings of the HttpURLConnection API.

Stack-Walking API

When writing Java code, programmers look for ways to find and filter trances efficiently. The latest version of Java supports stack walking by providing the Stack-Walking API. The new API makes it easier for developers to access and filter stack data. It also supports short and long distance travel. Therefore, it becomes easier for programmers to find and filter the entire stack without relying on a virtual machine to capture the data.

Datagram Transport Layer Security (DTLS) API

Java 9 helps developers develop secure applications by providing a Datagram Transport Layer Security (DTLS) API. The API makes client-server communication more secure by eliminating opportunities for data tampering, message eavesdropping, and eavesdropping. Also, it provides communication privacy to various devices that use the Datagram Transport Protocol (DTP). Although it is based on Transport Layer Security (TLS), DTLS uses the SSL protocol.

Method Extension API

Java programmers often find it difficult to control and improve performance. The Process API provided by the previous version for developers to access your code and write other code. But the well-structured API provided by Java 9 makes it easier for programmers to control and manage workflows. They can use the API to create a Java program to interface with the operating system directly. Also, they can use new ways to work with names and countries without writing additional code.

Deleted Items

Although it offers several new features, Java 9 does not support some of the features provided by Java 8. For example, it no longer works with the Applet API. Java web developers should switch from Applet API to Java Web Start to launch applications from the browser. Similarly, Java 8 accelerates the development of garbage collectors in HotSpot systems by removing the Concurrent Mark Sweep (CMS) garbage collectors. By using the latest version of Java, developers no longer have the option of receiving Java warnings on deployment and selecting the JRE during startup.

Overall, Java 9 comes with several new features to simplify the development of applications for both large and small devices. However, some of the binaries and source code introduced with Java 9 are incompatible with earlier versions of the language. Developers have to make several changes to the code and upgrade libraries when migrating existing software to Java 9. But developers should consider upgrading their existing software to Java 9 to use these new features and enhancements. Java developers also need to use tools that are highly recommended for good software development.

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