In September, Oracle released Java SE 9 with over 150 new features. The latest version of the widely used programming language comes with several new features and APIs to accelerate development of applications for both large and small devices. At the same time, the features provided by Java 9 help programmers to enhance application’s performance, security, and maintainability. Hence, it becomes basic for programmers to understand some of the meaningful features provided by Java 9.
What Programmers Need to Know about Java 9?
Java 9 improves code compilation course of action considerably by ahead-of-time (AOT) compilation. The programmers can leverage AOT compilation compile Java classes into native code already before the virtual machine launches them. AOT compilation improves the performance of both large and small applications by overcoming major shortcomings of just-in-time (JIT) compilation. Unlike JIT compilation, AOT compilation ensures that no Java method remains uncompiled.
Java 9 comes with a new real-eval-print-loop (REPL) command line tool – Shell. Shell is designed with features to estimate declarative statements and expressions interactively. A programmer can use Shell to estimate the quality of Java code before compilation. He can simply go into a piece of code and collect feedback. Shell already has the capability to complete tabs and add required terminal semicolons automatically. The new REPL tool makes Java compete with widely used programming languages like Python and Scala.
Improved Stream API
While writing Java code, programmers use strings to express calculations. Java 8 accelerated stream processing by providing the flows API. Java 9 comes with an improved version of the flows API that enables developers to take and drop items from Stream based on specific conditions by adding methods. Also, the improved flows API is designed with features to create a stream for nullable value and iterate over Stream elements.
Multi-Resolution Image API
Java 9 introduces a new interface – MultiResolutionImage – to create a single multi-resolution image by encapsulating multiple images with varying resolutions. The developers can further use the Multi-Resolution Image API provided by Java 9 to get various variants of a single image. Also, they can use the API to select a particular image based on the required resolution. Hence, the Java programmers can now use a single API to create a unified multi-resolution image and get resolution-specific image variants.
http://2 client API
Java 9 completely changed the way applications make HTTP calls. It replaces the HttpURLConnection API with a new HTTP client API. The HTTP client API supports both http://2 and WebSockets. However, the API is currently not a part of Java SE. It is implemented as an incubator module which lives under the jdk.incubtor namespace. But the HTTP client API supports the latest communication standards, while overcoming the shortcomings of the HttpURLConnection API.
While writing Java code, programmers analyze ways to access and filter stack trances efficiently. The latest version of Java simplifies stack walking by providing the Stack-Walking API. The new API makes it easier for programmers to access and filter stack trace information. It further supports both short and long walks. Hence, it becomes easier for programmers to access and filter the complete stack without relying on the virtual machine to capture the stack information.
Datagram Transport inner Security (DTLS) API
Java 9 helps developers to build obtain applications by providing an API for Datagram Transport inner Security (DTLS). The API keeps client and server communication obtain by eliminating chances of data tampering, message forgery, and eavesdropping. Also, it provides communication privacy to a variety of applications that use Datagram Transport Protocol (DTP). Despite being developed based on Transport inner Security (TLS), DTLS implements SSL protocol.
Improved course of action API
Often Java programmers find it daunting to control and manage operating system processes. the time of action API provided by earlier version of developers to access the native code and write additional code. But the improved course of action API provided by Java 9 makes it easier for programmers to control and mange operating system processes. They can use the API to make a Java application interact with the operating system directly. Also, they can take advantage of the new methods to manager course of action names and states without writing additional code.
Despite providing several new features, Java 9 does not sustain some of the features provided by Java 8. for example, it no longer supports Applet API. The Java web developers have to switch from Applet API to Java Web Start to set afloat applications from web browsers. Likewise, Java 8 speeds up development of garbage collectors in HotSpot virtual machine by deprecating Concurrent Mark Sweep (CMS) garbage collectors. While using the most recent version of Java, programmers also without option to receive Java warnings on import statements and select JRE at set afloat time.
On the whole, Java 9 comes with several new features to simplify development of applications for both large and small devices. However, some of the binaries and source introduced by Java 9 are not compatible with earlier versions of the programming language. The programmers already have to make several changes to the code and upgrade libraries while migrating existing applications to Java 9. But the developers must consider upgrading their existing applications to Java 9 to take advantage of these new features and enhancements. Java developers also should use these highly recommended tools for better programming.