In Java 9, Process API supports an easy way to get much information about a process. ProcessHandle interface can identify and provide the control of native processes and method to check processes liveness and destroy the processes whereas ProcessHandle.Info interface can give an Information snapshot of a process. We need to destroy a process by using the destroy() method of the ProcessHandle interface.In the below example, we need to terminate a process by using the ProcessHandle interface.Exampleimport java.io.File; import java.io.IOException; import java.util.Objects; public class DestroyProcessTest {    public static void main(String[] args) throws InterruptedException {       System.out.println("---------------------------");       ... Read More

In Java 9, the ofInstant() method has introduced for conversion. It is a static method of LocalDate, LocalTime, and LocalDateTime classes. This method converts java.time.Instant object to LocalDate that requires a time zone in the form of java.time.ZoneId.Syntaxpublic static LocalTime ofInstant(Instant instant, ZoneId zone) public static LocalDate ofInstant(Instant instant, ZoneId zone) public static LocalDateTime ofInstant(Instant instant, ZoneId zone)Exampleimport java.time.LocalDate; import java.time.LocalTime; import java.time.LocalDateTime; import java.time.Instant; import java.time.ZoneId; public class OfInstantMethodTest {    public static void main(String args[]) { Instant instant = Instant.parse("2020-02-05T02:35:15.245Z"); System.out.println("Instant: " + instant); ... Read More

In this article, we will learn about the use of the toEpochSecond() method in Java 9. First, we will learn about the LocalDate class, its methods, then we will know about the Epoch Time and the toEpochSecond() method with its uses and example in Java. LocalDate Class The LocalDate class is a part of java.time package. LocalDate class represents a date without a time-zone in the ISO-8601 calendar system, such as 2020-10-14. This class represents a date in the format yyyy-MM-dd. The following are some of the common methods of the LocalDate Class getDayOfMonth(): This ... Read More

Internationalization enhancements in Java 9 include Unicode 8.0, UTF-8 properties files and enabling CLDR locale data by default. Java 9 supports up to Unicode 8.0 standards with 10, 555 characters, 29 scripts, and 42 blocks.In Java 9, the properties files are loaded in UTF-8 encoding. By default, reading an input stream throws MalformedInputException or UnmappableCharacterException. In this case, PropertyResourceBundle instance reset to a state before the exception, re-reads the input stream in ISO-8859-1, and continues reading.If PropertyResourceBundle.encoding has set to either ISO-8859-1 or UTF-8, then PropertyResourceBundle instance read an input stream in that encoding, and throw an exception if encountering an invalid sequence. The system property read ... Read More

In this article, we will learn to access each stack element of StackWalker in Java 9. We will learn about the StackWalker API and its methods, and use of getStackTrace() method for accessing each stack element. StackWalker API StackWalker API allows easy filtering and lazy access to execute tasks within any method. It is an efficient API for obtaining stack trace information in Java 9. StackWalker API is an alternative to Thread.getStackTrace() or Throwable.getStackTrace() and SecurityManager.getClassContext(). This API targets a mechanism to traverse and materialize required stack frames, allowing efficient lazy access to additional stack frames when required. The following ... Read More

In Java 9, a new method added to the Collectors class: flatMapping(). It is similar to the Collectors.mapping() method in which the flatMapping() method allows us to handle nested collections. The Collectors.flatMapping() method takes a function to be applied to input elements and a collector to accumulate the elements passed through the function. Unlike the Collectors.mapping() method, the Collectors.flatMapping() method deals with a stream of elements that allows us to get rid of unnecessary intermediary collections.Syntaxpublic static Collector flatMapping(Function

Collectors class is an essential part of the Stream API. In Java 9, a new method: filtering() added to the Collectors class. The Collectors.filtering() method can be used for filtering elements in a stream. It is similar to the filter() method on streams. The filter() method processes the values before they have grouped whereas the filtering() method can be used nicely with the Collectors.groupingBy() method to group the values before the filtering step takes place.Syntaxpublic static Collector filtering(Predicate

JShell is an interactive tool introduced since Java 9. It is Java's first official REPL tool to create a simple programming environment in the command-line that reads the user's inputs, evaluates it, and prints the result.We can able to create a new JShell instance programmatically in Java language. JShell and its associated APIs can be found under jdk.jshell package. we can get a new instance for JShell by using the static method: create() of JShell class. The eval() method of JShell class used to add an expression to JShell instance. It returns a list of events triggered by the evaluation. It is exactly one ... Read More

The primary objective of the Jigsaw project is to introduce the modularity concept to create a module in Java 9 and then applying the same to JDK.Below are some of the benefits of Modularity(Jigsaw)Strong Encapsulation: The modules can access only those parts that can be available for use. Unless the package is explicitly exported into the module-info.java file, public classes in a package can't be public.Clear Dependencies: A module must declare about other modules that they are used through the required clause. The modules are combined in order to create a shorter runtime that can be scaled to comparatively smaller computing ... Read More

In this article, we will learn to use the readNBytes() method of InputStream in Java 9. We will get to know the InputStream Class with its methods as readNBytes() is a method of this class. After that, we will learn about the readNBytes() method with its syntax and when to use this method, along with an example. InputStream Class The Java InputStream class is the superclass of all classes representing an input stream of bytes. Every subclass of InputStream always needs to introduce a method to return the next byte on request. The following are some of the common methods of ... Read More