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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to iterate the contents of a collection using forEach() in Java?
Lambda expression is the anonymous representation of a function descriptor of a functional interface. As we know that all collection interfaces like List, Set and Queue use an Iterable as their super interface. Since Java 8, an Iterable interface introduces a new method called forEach(). This method performs an action on the contents of Iterable in the order elements that occur when iterating until all elements have processed.Syntaxvoid forEach(Consumer
Read MoreHow to use BinaryOperator interface in lambda expression in Java?
BinaryOperator is one of a functional interface from java.util.function package and having exactly one abstract method. A lambda expression or method reference uses BinaryOperator objects as their target. BinaryOperator interface represents a function that takes one argument of type T and returns a value of the same type.BinaryOperator Interface contains two static methods, minBy() and maxBy(). The minBy() method returns a BinaryOperator that returns the greater of two elements according to a specified Comparator while the maxBy() method returns a BinaryOperator that returns the lesser of two elements according to a specified Comparator.Syntax@FunctionalInterface public interface BinaryOperator extends BiFunctionExampleimport java.util.function.BinaryOperator; ...
Read MoreHow to use Supplier interface in lambda expression in Java?
A Supplier interface is a pre-defined interface that represents the supplier of results. It is instantiated using lambda expression or method reference or default constructor. The functional method of a Supplier interface is the get() method. This interface belongs to java.util.function package.Syntax@FunctionalInterface public interface SupplierIn the below program, we can use the Supplier interface in a lambda expression. The get() method only returns a value and doesn't accept any argument, so a lambda expression having an empty argument part.Exampleimport java.util.*; import java.util.function.*; public class SupplierTest { public static void main(String args[]) { ...
Read MoreHow to use Predicate and BiPredicate in lambda expression in Java?
A Predicate interface defined in java.util.function package. It represents a boolean-valued function with one argument. It is kind of a functional interface whose functional method is the test(). BiPredicate interface is similar to the Predicate interface with two arguments. It can be used as an assignment target for a lambda expression.Syntax for Predicate@FunctionalInterface public interface PredicateExampleimport java.util.*; import java.util.function.*; import java.util.stream.*; public class EmployeePredicateTest { public static void main(String[] args) { Employee e1 = new Employee(1, 23, "M", "Raja"); Employee e2 = new Employee(2, ...
Read MoreSymmetric Min-Max Heaps
A symmetric min-max heap (SMMH) is defined as a complete binary tree in which each node except the root has exactly one element. The root of an SMMH be empty and the total number of nodes in the SMMH is m + 1, where m is the number of elements.Let y be any node of the SMMH. Let elements(y) be the elements in the sub tree rooted at y but excluding the element (if any) in y. Assume that elements(y) j= ∅. y satisfies the following properties:The left child of y has the minimum element in elements(y).The right child of ...
Read MoreHow to sort a list by name using a Comparator interface in Java?
Comparator interface can be used to order the objects of user-defined classes. It is capable of comparing two objects of two different classes. We can sort a list of objects where we can't modify the object’s source code to implement Comparable interface. A lambda expression can't be executed on its own and used to implement methods that are declared in a functional interface.In the below example, we need to sort a list by name using the Comparator interface and Stream API with the help of lambda expressions.Exampleimport java.util.*; import java.util.function.*; import java.util.stream.*; public class ListSortByNameTest { public static void main(String[] args) { List arrayList = new ArrayList(); ...
Read MoreHow to use Function and BiFunction interfaces in lambda expression in Java?
The Function interface is a pre-defined functional interface that can be used as an assignment target for a lambda expression or method reference. It takes a single parameter and returns result by calling the apply() method. While the BiFunction interface is also a pre-defined functional interface that takes two parameters and returns a result. It is similar to the Function interface except it takes two parameters.Syntax@FunctionalInterface public interface Function @FunctionalInterface public interface BiFunctionExampleimport java.util.function.BiFunction; import java.util.function.Function; public class SampleFunctionBiFunctionTest { public static void main(String[] args) { Function printNumber = ...
Read MoreHow to use Consumer and BiConsumer interfaces in lambda expression in Java?
A Consumer interface is a predefined functional interface that can be used when creating lambda expressions or method references. This interface represents an operation that accepts a single input parameter and doesn't return anything. It contains only one method named accept(). The BiConsumer interface is similar to a Consumer interface and accepts two input parameters and doesn’t return anything.Syntax@FunctionalInterface public interface Consumer @FunctionalInterface public interface BiConsumerExampleimport java.util.*; import java.util.function.*; public class ConsumerBiConsumerTest { public static void main(String[] args) { Consumer c = (x) -> System.out.println(x.toLowerCase()); // lambda expression ...
Read MoreHow to generate a strong password using PowerShell?
To generate a strong password with the PowerShell, we can use 8 or more characters password. In the below example, we are going to use the 8 character password, you can change the number of characters as per your convenience.This script you can bind into windows forms and provide it to the IT helpdesk to set the password for new users.In this example, we will use the Random integers between 33 and 126 and convert it to the Character, considering them they are the ASCII values for characters.You can find more about ASCII values in the table provided in the ...
Read MoreHow to copy Items to the destination path with the differentncredentials in PowerShell?
To copy the items with the different credentials you need to use the credential parameter in the Copy-Item cmdlet.For example,Copy-Item C:\temp\* -Destination \Remoteshare\c$\temp -Credential (Get- Credential)Or$creds = (Get-Credential) Copy-Item C:\temp\* -Destination \Remoteshare\c$\temp -Credential $creds
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