Java LinkedHashSet forEach() Method

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The LinkedHashSet.forEach() method in Java is used to perform an action for each element in the LinkedHashSet. 

Table of Contents

1. Introduction
2. forEach Method Syntax
3. Examples
   • Iterating Over Elements in LinkedHashSet
   • Performing Actions on Elements
4. Conclusion

Introduction

The LinkedHashSet.forEach() method is a member of the LinkedHashSet class in Java. It allows you to perform a specified action for each element in the LinkedHashSet. This method is part of the Iterable interface and is commonly used to iterate over the elements in a collection.

forEach() Method Syntax

The syntax for the forEach method is as follows:

public void forEach(Consumer<? super E> action) 

• The method takes a single parameter action of type Consumer<? super E>, which represents the action to be performed for each element.
• The method does not return any value.

Examples

Iterating Over Elements in LinkedHashSet

The forEach method can be used to iterate over the elements in a LinkedHashSet.

Example

import java.util.LinkedHashSet; public class ForEachExample { public static void main(String[] args) { // Creating a LinkedHashSet of Strings LinkedHashSet<String> animals = new LinkedHashSet<>(); // Adding elements to the LinkedHashSet animals.add("Lion"); animals.add("Tiger"); animals.add("Elephant"); // Using forEach to iterate over the elements and print them animals.forEach(animal -> System.out.println("Animal: " + animal)); } } 

Output:

Animal: Lion Animal: Tiger Animal: Elephant 

Performing Actions on Elements

You can use the forEach method to perform various actions on the elements of the LinkedHashSet.

Example

import java.util.LinkedHashSet; public class ActionExample { public static void main(String[] args) { // Creating a LinkedHashSet of Strings LinkedHashSet<String> animals = new LinkedHashSet<>(); // Adding elements to the LinkedHashSet animals.add("Lion"); animals.add("Tiger"); animals.add("Elephant"); animals.add("Giraffe"); animals.add("Zebra"); // Using forEach to convert elements to uppercase and print them animals.forEach(animal -> { String upperCaseAnimal = animal.toUpperCase(); System.out.println("Uppercase Animal: " + upperCaseAnimal); }); } } 

Output:

Uppercase Animal: LION Uppercase Animal: TIGER Uppercase Animal: ELEPHANT Uppercase Animal: GIRAFFE Uppercase Animal: ZEBRA 

Conclusion

The LinkedHashSet.forEach() method in Java provides a way to perform a specified action for each element in a LinkedHashSet. By understanding how to use this method, you can efficiently iterate over and manipulate the elements in your collections. This method is useful for processing collections in a concise and functional style, making it a valuable tool for managing data in your Java applications.