In September, Oracle released Java SE 9, which includes more than 150 new features. The latest version of the widely used programming language comes with new functions and APIs to accelerate the development of applications for large and small devices. At the same time, Java 9 features can help programmers improve application performance, security, and maintainability. Hence, it is important for programmers to understand some of the main features of Java 9.
What do programmers need to know about Java 9?
Java 9 significantly improves the code compilation process through early (AOT) compilation. Even before the virtual machine starts the Java class, the programmer can use AOT compilation to compile the Java class to native code. AOT compilation improves the performance of applications large and small by overcoming the major drawbacks of just-in-time (JIT) compilation. Unlike JIT compilation, AOT compilation ensures that no Java method is left uncompiled.
Real-time print cycle tool
Java 9 ships with a new real-eval-print-loop (REPL) command line utility. Shell is designed to interactively evaluate declarative statements and expressions. Programmers can use Shell to evaluate the quality of Java code before compiling. All he needs to do is enter a snippet of code and collect feedback. Shell can even automatically fill in tabs and add required semicolons. The new REPL tool allows Java to compete with commonly used programming languages such as Python and Scala.
Improved streaming API
When writing Java code, programmers use strings to represent calculations. Java 8 speeds up stream processing by providing the Streams API. Java 9 ships with an improved version of the Streams API, allowing developers to add methods to delete and remove items from the Stream based on specific conditions. In addition, the features of the enhanced Streams API also include the ability to create and loop a stream of nullable values on Stream elements.
API for multi-resolution images
Java 9 introduced a new interface – MultiResolutionImage – to create a single image with multiple resolutions by encapsulating multiple images with different resolutions. Developers can further use Java 9’s multi-resolution image API to obtain different variations of a single image. In addition, they can use the API to select specific images based on the required resolution. Therefore, Java programmers can now use a single API to create uniform, multiple-resolution images and obtain resolution-specific image variants.
http: // 2 Client API
Java 9 has completely changed the way applications make HTTP calls. It replaces the HttpURLConnection API with the new HTTP client API. The HTTP client API supports both http: // 2 and WebSockets. However, this API is not currently part of Java SE. It is implemented as an incubator module, located under the jdk.incubtor namespace. However, the HTTP client API supports the latest communication standards and overcomes the shortcomings of the HttpURLConnection API.
Stack Walk API
When writing Java code, programmers are exploring ways to efficiently access the stack tr. The latest version of Java simplifies stacking by providing the Stack-Walking API. The new API makes it easier for programmers to stack trace
licenses that use Datagram Transport Protocol (DTP). Despite being developed based on Transport Layer Security (TLS), DTLS implements SSL protocol.
Improved Process API
Often Java programmers find it daunting to control and manage operating system processes. The Process API provided by earlier version of developers to access the native code and write additional code. But the improved Process 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 handle process names and states without writing additional code.