Hashtable Java

Java For Beginners, Low Prices. Free UK Delivery on Eligible Order As of the Java 2 platform v1.2, this class was retrofitted to implement the Map interface, making it a member of the Java Collections Framework. Unlike the new collection implementations, Hashtable is synchronized. If a thread-safe implementation is not needed, it is recommended to use HashMap in place of Hashtable Hashtable in Java It is similar to HashMap, but is synchronized. Hashtable stores key/value pair in hash table. In Hashtable we specify an object that is used as a key, and the value we want to associate to that key. The key is then... The initial default capacity of Hashtable class is 11 whereas. Was sind Hashtable und Hashmap? Hashtable und Hashmap stellen assoziative Suchtabellen dar, deren Einträge aus Schlüssel-Wert-Paaren bestehen. Die Hashtable wurde ab Java 1.2 durch die Hashmap ergänzt, um dem Collections -Framework zu entsprechen. Beides sind Implementierungen einer Hashtabelle, die sich sehr ähnlich sind Hashtabelle in Java. Die Hashtabelle enthält Einträge in Form eines Schlüsselwerts. Jeder Schlüssel ist ein Objekt mit einem eindeutigen Wert. Die Hashtabelle verwendet die Hashing-Technik, bei der der Schlüssel gehasht wird, und verwendet den resultierenden Hashcode als Index des Schlüssels

Java Hashtable class Points to remember. A Hashtable is an array of a list. Each list is known as a bucket. The position of the bucket is... Hashtable class declaration. Let's see the declaration for java.util.Hashtable class. Hashtable class Parameters. Let's see the Parameters for. Hashtable est la plus ancienne implémentation d'une structure de données de table de hachage en Java. ** Le HashMap est la deuxième implémentation, qui a été introduit dans JDK 1.2. Les deux classes offrent des fonctionnalités similaires, mais il existe également de petites différences que nous allons explorer dans ce tutoriel. 2 • Hashtables stellen effiziente Implementierungen von Mengen dar • Wichtige Operationen sind • Einfügen (insert) • Löschen (delete) • Suchen (search/contains) • Ziel der Hashtabellen ist es, diese drei Operation in (durchschnittlich) konstanter Zeit zu realisiere

Java For Beginners - at Amazo

Hashtable (Java Platform SE 8 ) - Oracl

  1. HashTableは内部で同期処理が行われる為、上記のような問題はありません。 一般的に、同期処理が求められなようなケースではHashMapの利用が推奨されています。 Hashtableクラスの使い方. java.util.Hashtableクラスをインポートして利用します。インスタンス化の方法はHashMapと同じです。また、putメソッドによる値の追加、getメソッドによるバリューの取得ができる点.
  2. Ein Java-Hashtable enthält intern Fächer, in denen die Schlüssel/Wertpaare abgelegt werden. Hashtable ist HashMap ziemlich ähnlich. Der bedeutendste Unterschied zwischen ihnen ist, dass Hashtable synchronisiert ist, HashMap jedoch nicht. Hashtable als Datenstruktur Hashtable ist eine Datenstruktur, in der Daten als Array gespeichert werden. Jeder Datenwert hat einen eindeutigen.
  3. Java Hashtable class Java Hashtable class is an implementation of hash table data structure. It is very much similar to HashMap in Java, with most significant difference that Hashtable is synchronized while HashMap is not. In this Hashtable tutorial, we will learn it's internals, constructors, methods, use-cases and other important points
  4. Hashtable in Java is an implementation of the Map interface. The Hashtable class in Java does not allow null key or value. The Hashtable class is contained in the java.util package. You have to import the java.util package using the import statement to use the Hashtable class in the code
  5. HashTable is an underlying data structure where the insertion order in HashTable is not preserved, and it is based on the hashcode of keys.Duplicates keys are not allowed, but values can be duplicated. Heterogeneous objects are allowed for both keys and values. Value null is not allowed for both key and value otherwise we will get RunTimeException saying NullPointerException
  6. A Hashtable in Java is an array of elements that are lists. Each of these lists is termed as a bucket. It maps the keys to values. In Java, the hash table is implemented by the 'HashTable' class
  7. e to which bucket the key-value pair should be mapped. Hashtable is similar to HashMap.

There are several differences between HashMap and Hashtable in Java: Hashtable is synchronized, whereas HashMap is not. This makes HashMap better for non-threaded applications, as unsynchronized Objects typically perform better than synchronized ones. Hashtable does not allow null keys or values Hashtable in java with example. By Chaitanya Singh | Filed Under: Java Collections. This class implements a hash table, which maps keys to values. Any non-null object can be used as a key or as a value. Hashtable is similar to HashMap except it is synchronized. There are few more differences between HashMap and Hashtable class, you can read them in detail at: Difference between HashMap and. Hashtable: Java Basics - Anfänger-Themen: 3: 23. Jul 2020: H: Klassen Auf eine Hashtable aus mehreren Klassen zugreifen: Java Basics - Anfänger-Themen: 12: 19. Dez 2015: Verkaufsautomat Enumerations HashTable: Java Basics - Anfänger-Themen: 1: 5. Jul 2015: D: Hashtable: Java Basics - Anfänger-Themen: 4: 5. Apr 2015: K: Hashtable mit eigenen Konstruktor: Java Basics - Anfänger-Themen: 2: 2. Feb 201 Java HashMap. In the ArrayList chapter, you learned that Arrays store items as an ordered collection, and you have to access them with an index number (int type). A HashMap however, store items in key/value pairs, and you can access them by an index of another type (e.g. a String).. One object is used as a key (index) to another object (value). It can store different types: String keys and. In der Informatik bezeichnet man eine spezielle Indexstruktur als Hashtabelle (englisch hash table oder hash map) bzw. Streuwerttabelle.Sie wird verwendet, um Datenelemente in einer großen Datenmenge zu suchen bzw. aufzufinden (Hash-oder Streuspeicherverfahren).. Gegenüber alternativen Index-Datenstrukturen wie Baumstrukturen (z. B. ein B+-Baum) oder Skip-Listen zeichnen sich Hashtabellen.

Search algorithm - Wikipedia

Hashtable in Java - GeeksforGeek

HashTable implementation in Java. GitHub Gist: instantly share code, notes, and snippets. Skip to content. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. amadamala / HashTable.java. Last active May 17, 2021. Star 10 Fork 5 Star Code Revisions 3 Stars 10 Forks 5. Embed. What would you like to do? Embed Embed this gist in your. java.util.Hashtable.get() Method - The get(Object key) method is used to get the value to which the specified key is mapped in this hashtable

Hashtable und Hashmap - javabeginners

HashTable摘要HashTable是较为远古的使用Hash算法的容器结构了,现在基本已被淘汰,单线程转为使用HashMap,多线程使用ConcurrentHashMap。 HashTable继承体系HashTable<K,V>也是一种key-value结构,它继承 首发于 Java容器. 写文章. HashTable详解. 征服天堂. 计算机. 3 人 赞同了该文章. HashTable摘要. HashTable是较为远古的. Hashtable和HashMap在Java面试中相当容易被问到,甚至成为了集合框架面试题中最常被考的问题,所以在参加任何Java面试之前,都不要忘了准备这一题。 这篇文章中,我们不仅将会看到HashMap和Hashtable的区别,还将看到它们之间的相似之处。 HashMap和Hashtable的区别. HashMap和Hashtable都实现了Map接口,但决定. In Java version 2, the Hashtable class was rewritten to implement the Map interface and that made it a member of the Java Collection Framework.. Unlike most collection implementations e.g. HashMap, the Hashtable is synchronized.If multi-threaded support is not needed, it is recommended to use the HashMap class instead of the Hashtable class

uses a generic Hashtable to store the names of bank depositors and their current balances: 9.48.19. Check if a particular key exists in Java Hashtable: 9.48.20. Check if a particular value exists in Java Hashtable: 9.48.21. Iterate through keys of Java Hashtable: 9.48.22. Iterate through values of Java Hashtable: 9.48.23. Remove all values from. All About Class Hashtable in Java. The Hashtable class is a concrete subclass of Dictionary that builds a table of key/value pairs. Any non-null object can be used as a key or as a value. The objects used as keys must implement the equals() and hashCode() methods in a way that computes comparisons and hashcodes from the contents of an object. Once the table is built, a value can be efficiently. Una Hashtable Java es una estructura de datos que utiliza una función hash para identificar datos mediante una llave o clave (ej. Nombre de una persona). La función hash transforma una llave a un valor índice de un arreglo de elementos. En este caso a una índice de nuestra Hashtable Java.. Una Hashtable Java más específica del funcionamiento es la siguiente

Hashtable in Java - Java Hashtable-Klasse - Java

Hashtable in Java - javatpoin

  1. If you're learning about Java and its applications, you must have come across HashMap and HashTable.Both of them are among the most important classes in the Java Collection framework. You'll be using them extensively while developing with Java, which is why it's vital to understand their differences
  2. 112 * 113 * @author Arthur van Hoff 114 * @author Josh Bloch 115 * @author Neal Gafter 116 * @see Object#equals(java.lang.Object) 117 * @see Object#hashCode() 118 * @see Hashtable#rehash() 119 * @see Collection 120 * @see Map 121 * @see HashMap 122 * @see TreeMap 123 * @since JDK1.0 124 */ 125 public class Hashtable<K,V> 126 extends Dictionary<K,V> 127 implements Map<K,V>, Cloneable, java.io.
  3. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable. The general contract of hashCode is: Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer.

Lớp Hashtable trong Java - Học Java cơ bản và nâng cao cho người mới học về Ngôn ngữ hướng đối tượng, Ví dụ Java, Phương thức, Ghi đè, Tính kế thừa, Tính trừu tượng, Tính đa hình, Overriding, Inheritance, Polymorphism, Interfaces, Packages, Collections, Lập trình mạng, Đa luồng, Tuần tự hóa, Networking, Multithreading, Generics. I created this HashTable implementation in the Fall semester of my junior year of college. It probably has way too many comments, and one day I hope to clean it up a bit. To compile: javac HashTable.java

Hashtable trong java. Những điểm quan trọng về lớp Hashtable trong java là: Hashtable là một mảng của list. Mỗi list được biết đến như một xô chứa các phần tử. Ví trí của một xô được xác định bằng việc gọi phương thức hashcode (). Hashtable cũng lưu trữ dữ liệu dưới. Hashtable Java Constructors. Hashtable(), the default constructor. It creates an empty hashtable. (Default initial capacity = 11, load factor =0.75). Hashtable(int size) constructs a hashtable of specified size. Hashtable(int size, float fillRatio) creates hash table of specified size and fill ratio. Hashtable(Map m) creates a hashtable with the same mappings as the given Map. Hashtable. Java - Allgemein. Hashtable sortieren. Eine Möglickeit eine Hashtable zu sortieren geht so (Genaugenommen wird natürlich nicht die Hashtable sortiert, sondern der Vector mit den Keys): package com. sowas. javawiki. examples; import java.util.Hashtable; public class SortedHashtableExample { public static void main (String [] args) {Hashtable < String, Integer > ht = new Hashtable < String.

Hashtable is a class in Java collections framework that is used to store data in key-value pairs. It is a legacy class in Java and works on the hash concept to store elements. In the latest Java versions, Hashtable is not recommended. We should rather use HashMap that is more advanced than Hashtable. See the below table that summarizes key differences between Hashtable and HashMap in Java Oct. 26, 13 · Java Zone · Tutorial. Like (8) Comment (8) Save. Tweet. 754.89K Views. Join the DZone community and get the full member experience. Join For Free. Scenario. HashMap can be used to.

Une introduction à la classe Java

  1. Java Hashtable java.util. More than 3 years have passed since last update. 今回書くこと:. Hashtableクラス. Enumerationインターフェース. Hashtableなどにキーと値を入れるためのプロパティファイルは. temp.properties. Copied! key1 = value1 key2 = value2 key3 = value3 key4 = value4
  2. Java HashMap vs Hashtable. By SFG Contributor May 10, 2019 Java. 0 Comments. The Java collection framework provides several collection implementations to store and operate on objects. Some groups of implementations are similar in the operations they perform, and it is common for novice programmers to use them interchangeably. ArrayList and LinkedList are two such implementations that are often.
  3. Best Java code snippets using java.util.Hashtable (Showing top 20 results out of 33,417) Common ways to obtain Hashtable. private void myMethod () {. H a s h t a b l e h =. new Hashtable () new Hashtable<> () new Hashtable<String, Object> () Smart code suggestions by Tabnine.
  4. 2777776-Custom Masthead iView don't start due to NullPointerException at java.util.Hashtable.put() metho
  5. 2. Hashtable is synchronized. Unless you're using it in a multi-threaded situation, you probably don't need it (and even then you need to use it with care), and it will be slower than HashMap. 3. Returning an interface is usually better; and you have 3 to choose from: Map (as already suggested), SortedMap, or NavigableMap. Which one you choose.
  6. Basic Hashtable Operations. How to iterate through Hashtable? How to copy Map content to another Hashtable? How to search a key in Hashtable? How to search a value in Hashtable? How to get all keys from Hashtable? How to get entry set from Hashtable? How to delete all elements from Hashtable? How to read elements using Enumeration in Hashtable

Java Hashtable( 해시 테이블 ) 예제, 간단한 값 넣었다 빼기 데이터를 테이블 형식으로 구성하고자 할 때, 데이터베이스를 많이 사용합니다. 하지만 일반적인 데이터베이스는 대용량의 데이터를 처리하기 용이하게 구성해 디스크로 써 놓은 형태이기 때문에 속도가 느린편입니다. ( Disk I/O 비용이 얼마나. Complete Java Tutorial : https://goo.gl/3NaAW1HashMap and HashTable both implements Map interface.HashTable is synchronized and HashMap is not synchronized.H.. Lớp Java Hashtable cài đặt (implement) một bảng hashtable để map khóa và giá trị. Hashtable kế thừa lớp Dictionary và cài đặt (implement) Map Interface. Các đặc điểm quan trọng về lớp Hashtable trong java là: Hashtable là một mảng của list. Mỗi list được biết đến như một bucket (vùng chứa) các phần tử. Ví trí của một. Hashtable Class In Java. Hashtable class Of Java collection framework implements the Hashtable, which maps the keys to the values. In this class, any null object can be used as a key or as a value. If we compare the Hashtable with the HashMap, you will find the Hashtable is synchronized, whereas HashMap is not synchronized 从Java 2平台v1.2开始,该类被改进以实现Map接口,使其成为Java Collections Framework的成员。 与新的集合实现不同, Hashtable是同步的。 如果不需要线程安全实现,建议使用HashMap代替Hashtable 。 如果需要线程安全的高度并发实现,则建议使用ConcurrentHashMap代替Hashtable

Eine Einführung in die Java

However, Java 2 re-engineered Hashtable so that it also implements the Map interface and making it a member of the Java Collections Framework. How Hashtable works? The hash algorithm is used to generate an index into that array based on the values of the item that will be stored in the array. The maximum size of this array is typically smaller than the number of items in the set of possible. HashMap in Java is like the legacy Hashtable class, but it is not synchronized. It allows us to store the null elements as well, but there should be only one null key. Since Java 5, it is denoted as HashMap<K,V>, where K stands for key and V for value. It inherits the AbstractMap class and implements the Map interface. Points to remember. Java HashMap contains values based on the key. Java.

uses a generic Hashtable to store the names of bank depositors and their current balances: 9.48.19. Check if a particular key exists in Java Hashtable: 9.48.20. Check if a particular value exists in Java Hashtable: 9.48.21. Iterate through keys of Java Hashtable: 9.48.22. Iterate through values of Java Hashtable: 9.48.23. Remove all values from. 在面试的时候,java集合最容易被问到的知识就是HashMap与Hashtable的比较,通常我们也很容易回答出一下几点: 1、HashMap是线程不安全的,在多线程环境下会容易产生死循环,但是单线程环境下运行效率高;Hashtable线程安全的,很多方法都有synchronized修饰,但同时因为加锁导致单线程环境下效率较低

分类专栏: 深入Java集合学习系列 文章标签: Hashtable的实现原理. 我们先对Hashtable有个整体认识,然后再学习它的源码,最后再通过实例来学会使用Hashtable。. 第1部分 Hashtable介绍. 第2部分 Hashtable数据结构. 第3部分 Hashtable源码解析 (基于JDK1.6.0_45) 第4部分 Hashtable. Hashtable and HashMap in Java. Hashtable and HashMap are quite similar - both are collections that implement the Map interface. Also, the put(), get(), remove(), and containsKey() methods provide constant-time performance O(1). Internally, these methods work based on a general concept of hashing using buckets for storing data. Neither class maintains the insertion order of the elements. In. HashTable. A HashTable is an array of the list. It was part of the java.util and is extended in the Dictionary class. HashTable was re-engineered to implement the Map interface. HashTable is similar to HashMap which can store elements in the form of key-value pairs and it is synchronized

Java - The Hashtable Class - Tutorialspoin

Program: How to read elements using Enumeration in Hashtable? Below example shows how to get all keys as Enumeration object. By calling keys () method, we can get all keys as Enumeration object. By using Enumeration methods like hasMoreElements () and nextElement () we can read all values from Hashtable. Get Size of Java Hashtable: 6. Iterate through keys of Java Hashtable: 7. Remove all values from Java Hashtable: 8. Scan the content of a hashtable: 9. Remove value from Java Hashtable: 10. Sort keys in an Hashtable: 11. Associates keys with values: 12. Iterate through values of Java Hashtable: 13. A simple Map implementation: 14. Hash table. The HashTable Class. The HashTable class extends the Dictionary abstract class to implement a hash table.In the table, keys are segmented into buckets based on their hash code. Thus, a key must expose the methods hashCode() (for bucket segment) and equals (to compare the two keys in the same bucket). For example, String has both method hashCode and equals, so it can be used as key type in a.

Java print hashmap key value pairs

Java Hashtable 类 菜鸟教程 - RUNOOB

  1. [Java] get 방식으로 한글 파라메터 전송시 한글꺠짐 (1) 2013.09.10 [Java] equals와 ==의 차이점 (0) 2011.09.14 [Java] HashMap과 Hashtable 의 차이점 (0) 2011.05.03 [Java] 페이징 클래스 (0) 2010.07.09 [Java] 절대 코더들도 까먹는 형변환 (int, double, long.. <->String) (0) 2010.06.0
  2. In previous articles, we have discussed various ways to iterate through Map i.e.; Various ways to iterate through Hashtable: Using legacy Enumeration interface introduced in Java 1.0 version; Using keySet() method and for-each loop Using keySet() method and Iterator interface Using entrySet() method and for-each loop Using entrySet() method and Iterator interfac
  3. In Java, the Hashtable responds to a collision by placing multiple values into the same bucket (other implementations may handle collisions differently). Figure 2 shows what a Hashtable might look.
  4. Java. More than 1 year has passed since last update. 1、継承が違い HashMap. HashTable. HashTable extends Dictionary ここにHashTableの親クラスdictionaryはもう使われていない。 2、nullキーの違い HashTableでは、nullのkeyとnullのvalueは使えない。 HashMapでは使える。 3、マルチスレッドのサポートの違い HashTableのIFはすべて.
  5. Java HashtableUse the Hashtable collection from java.util.Hashtable. Benchmark Hashtable and HashMap. dot net perls. Hashtable. This is an associative array: it associates keys (of any type) to values (of any type). HashMap is similar to Hashtable but not thread safe. It is slower. HashMap . Not preferred. With Hashtable, performance is reduced by internal synchronization (thread-checking.
  6. At entry level Java programmer, you can expect this interview question on Hashtable vs HashMap.Though the question becomes really easy when you know other concepts like how hashmap works, yet after getting a many queries from my blog readers who are preparing for or working at junior level, I have decided to summarize my knowledge on differences between HashMap and a Hashtable

Overview of HashMap, TreeMap and HashTable in Java CollectionsCheck Full Tutorial here: https://www.softwaretestinghelp.com/java/java-collections-framework/I.. Java Hashtable is a class that belongs to collection framework of Java library. Initially, the Hashtable class belonged to java.util namespace and was implemented as concrete form of the Dictionary class. But with many transformations that Java 2 brought, the Hashtable class was also modified to implement the Map interface and was placed into. Simple Hashtable with linear probing in java ( Does not apply any growth strategy). Raw. Hashtable.java. public class Hashtable {. private static final int SIZE = 97; private Pair [] map = null; public Hashtable () { Sort keys in an Hashtable: 11. Associates keys with values: 12. Iterate through values of Java Hashtable: 13. A simple Map implementation: 14. Hash table with separate chaining: 15. Hash table with linear probing: 16. Hash table with double hashing: 17. Working with Key-Value Pairs in a Hashtable: 18. Demonstrate the Hashtable class, and an. How to retrieve Hashtable elements by index, I mean that I store some dates in a hashtable, and in another place I'd like to get the first and the 3rd element from the hashtable. The dates come from a database, so I don't know them beforehand

Hashtable in java - W3spoin

Key Differences Between HashMap and Hashtable in Java. The HashMap implements Map interface and extends an abstract class, AbstractMap whereas, the Hashtable extends the abstract class Dictionary, which is also a Legacy class, later reengineered to implement Map interface. The HashMap object is unsynchronized i.e. multiple threads can operate on it at the same time and hence, it objects not. The objects used as keys by a Hashtable are required to override the Object.GetHashCode method (or the IHashCodeProvider interface) and the Object.Equals method (or the IComparer interface). The implementation of both methods and interfaces must handle case sensitivity the same way; otherwise, the Hashtable might behave incorrectly. For example, when creating a Hashtable, you must use the.

Java Hashtable详细介绍和使用示例 - 筱筱的春天 - 博客

  1. If a thread-safe highly-concurrent implementation is desired, then it is recommended to use java.util.concurrent.ConcurrentHashMap in place of {@code Hashtable}. Also see: Object#equals(java.lang.Object) Object#hashCode() Hashtable#rehash() Collection Map HashMap TreeMap author: Arthur - van Hoff author: Josh - Bloch author: Neal - Gafter since.
  2. Hashtable class implements Map interface. Hashtable stores the data in the form of key-value pairs, where key and value are objects. Hashcode of each key is computed internally and this value of hash code is used as an index at which the value is stored in the hash table. This is how the association between each key-value pair is formed. Toggle navigation. Basic Java String File I/O Applets.
  3. C# Hashtable class represents a hashtable in C#. A hash table is a collection of key/value pairs that are stored based on the hash code of the key in the collection. C# HashTable is a generic collection. It is similar to the generic dictionary collection included in the System.Collection.Generics namespace
  4. public class Hashtable extends Dictionary implements Cloneable, Serializable This class implements a hashtable, which maps keys to values. Any non-null object can be used as a key or as a value.To successfully store and retrieve objects from a hashtable, the objects used as keys must implement the hashCode method and the equals method.. An instance of Hashtable has two parameters that affect.
  5. First hashtable with element key as '0' and value as 'hello' key as '1' and value as 'new' Second hashtable with element key as '0' and value as 'how are you' key as '1' and value as 'phone' key as '2' and value as 'something' I need to merge these two hashtables values for the samekeys only in another hashtables
  6. VB.NET HashTable. A HashTable is used to store the collection of different types of data in key-value pairs. These table data are organized based on the hash key. A HashTable is provided by the System.Collection namespace. A Key is used to identify and access each element of the HashTable because each item in the HashTable has a Key/value pair

JavaのHashtableクラスの使い方を現役エンジニアが解説【初心者向け】 TechAcademyマガジ

Use Hashtable (HashMap) when You need to perform frequent search (by key) and Vector (ArrayList) when You just need some not limited space for Your objects. I highly recommend Sun's Java Tutorial and it's Collections trail Hashtable is an implementation of a key-value pair data structure in java. You can store and retrieve a 'value' using a 'key' and it is an identifier of the value stored. It is obvious that the 'key' should be unique. java.util.Hashtable extends Dictionary and implements Map. Objects with non-null value can be used as a [

HashTable in Java Tutorial | Java HashTable ExampleJava Hashmap Interview Questions | Interview Tips

java.lang.Object java.util.Hashtable All Implemented Interfaces: Map Direct Known Subclasses: Properties. public class Hashtable extends Object implements Map. A class which implements a hashtable data structure. This implementation of Hashtable uses a hash-bucket approach. That is: linear probing and rehashing is avoided; instead, each hashed value maps to a simple linked-list which, in the. Listing 15.7: Anwendung der Klasse HashMap. Der wichtigste Unterschied liegt in der Ausgabe der Ergebnisse. Während bei der Hashtable eine Enumeration verwendet wurde, müssen wir hier durch Aufruf von entrySet zunächst eine Menge der Schlüssel-Wert-Paare beschaffen. Diese liefert dann einen Iterator, der für jedes Element ein Objekt des Typs Map.Entry zurückgibt

HashSet in Java - GeeksforGeeksWorking with Hashtable and Dictionary in C# | InfoWorld
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