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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to implement LongConsumer using lambda in Java?
LongConsumer is a in-built functional interface from java.util.function package. This interface can accept a single long-valued argument as input and doesn't produce any output. It can also be used as the assignment target for a lambda expression or method reference and contains one abstract method: accept() and one default method: andThen().Syntax@FunctionalInterface public interface LongConsumerExample-1import java.util.function.LongConsumer; public class LongConsumerLambdaTest { public static void main(String[] args) { LongConsumer displayNextVal = l-> { // lambda expression System.out.println("Display the next value ...
Read MoreWhy has Russia blocked LinkedIn?
With all these daily advancements in technology, it has become much easier to connect with the outside world: be it looking for an old friend or searching for a new job. Earlier people had to scan all the newspapers to check whether there are any openings in any company and then, would rush to the spot for the interviews. Today all we have to do is just update our resumes on different sites, and they take the pain to mail us back with all the suitable jobs according to our qualification.Talking about connecting to the corporate world with a pool ...
Read MoreHow to implement IntUnaryOperator using lambda in Java?
IntUnaryOperator represents a functional interface that takes an int value and returns another int value. It is defined in java.util.function package and used as an assignment target for a lambda expression or method reference. It contains one abstract method: applyAsInt(), two default methods: compose(), andThen() and one static method: identity().Syntax@FunctionalInterface public interface IntUnaryOperatorExampleimport java.util.function.IntUnaryOperator; public class IntUnaryOperatorLambdaTest1 { public static void main(String[] args) { IntUnaryOperator getSquare = intValue -> { // lambda expression int result = intValue * ...
Read MoreHow to write lambda expression code for SwingUtilities.invokeLater in Java?
An event handling code that runs on a special thread called event dispatch thread(EDT). Most of the code that invokes swing methods also runs on this EDT thread. It is necessary because most of swing object methods do not thread-safe. SwingUtilities is a utility class and has one important static method, invokeLater(). This method can be used to perform a task asynchronously in the AWT event dispatcher thread.Syntaxpublic static void invokeLater(Runnable doRun)Exampleimport javax.swing.*; public class InvokeLAterLambdaTest { public static void main(String[] args) { SwingUtilities.invokeLater(() -> { // ...
Read MoreHow to implement DoubleBinaryOperator using lambda and method reference in Java?
DoubleBinaryOperator is a functional interface defined in java.util.function package. It accepts two parameters of type double as input and produces another double value as a result. DoubleBinaryOperator interface can be used as an assignment target for a lambda expression or method reference and has only one abstract method applyAsDouble().Syntax@FunctionalInterface public interface DoubleBinaryOperator { double applyAsDouble(double left, double right); }Example-1import java.util.function.DoubleBinaryOperator; public class DoubleBinaryOperatorTest { public static void main(String args[]) { // using lambda expression DoubleBinaryOperator sum = (d1, d2) -> d1 + d2; DoubleBinaryOperator mul = (d1, d2) -> d1 * d2; DoubleBinaryOperator div = ...
Read MoreHow to implement the IntPredicate interface using lambda and method reference in Java?
IntPredicate interface is a built-in functional interface defined in java.util.function package. This functional interface accepts one int-valued argument as input and produces a boolean value as an output. This interface is a specialization of the Predicate interface and used as an assignment target for a lambda expression or method reference. It provides only one abstract method, test ().Syntax@FunctionalInterface public interface IntPredicate { boolean test(int value); }Example for Lambda Expressionimport java.util.function.IntPredicate; public class IntPredicateLambdaTest { public static void main(String[] args) { IntPredicate intPredicate = (int input) -> { ...
Read MoreHow to implement ActionEvent using method reference in JavaFX?
The javafx.event package provides a framework for Java FX events. The Event class serves as the base class for JavaFX events and associated with each event is an event source, an event target, and an event type. An ActionEvent widely used when a button is pressed.In the below program, we can implement an ActionEvent for a button by using method reference.Exampleimport javafx.application.*; import javafx.beans.property.*; import javafx.event.*; import javafx.scene.*; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.*; import javafx.scene.effect.*; public class MethodReferenceJavaFXTest extends Application { private Label label; public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) { ...
Read MoreHow to implement ToDoubleFunction using lambda expression in Java?
ToDoubleFunction is a functional interface defined in java.util.function package. This functional interface expects a parameter as input and produces a double-valued result. It is used as an assignment target for a lambda expression or method reference. ToDoubleFunction interface contains only one abstract method, applyAsDouble().Syntax@FunctionalInterface public interface ToDoubleFunction { double applyAsDouble(T value); }Example-1import java.util.function.ToDoubleFunction; public class ToDoubleFunctionTest1 { public static void main(String args[]) { ToDoubleFunction strLength = s -> s.length(); // lambda expression System.out.println("The length of a given String ...
Read MorePerl vs Java
JavaJava is an object oriented programming language as well as a computing platform.It is safe, quick and reliable.The code in Java is first converted into bytecode and then executed using a JVM (Java Virtual Machine).The java program that is converted into bytecode is stored with the help of the extension ‘.class’.Java doesn’t give any specific way in which associative arrays could be stored, instead there are implementations of various hash functions.Java programs that need to be run are stored with the extension ‘.java’.Java is a statically typed language, i.e type checking is performed during compile-time (not run-time).Single line comments in ...
Read MorePackage Imports in JShell of Java 9
In general, 10 packages are imported using the JShell.The following command shows the packages that were imported by default.jshell> /importOutputimport java.io.* import java.math.* import java.net.* import java.nio.file* import java.sql.* import java.util.* import java.util.regex* import java.util.function* import java.util.prefs* import java.util.stream.*Importing a specific package using JShelljshell> import java.util.*;
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