Apache Commons Collections

by Apache Software Foundation

Apache Commons Collections is a library of common Java classes, utilities, and data structures, designed to extend the capabilities of the Java Collections Framework.

Operating system: Windows

Publisher: Apache Software Foundation

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Apache Commons Collections

Introduction

The Apache Commons Collections (Commons Collections) library provides a rich set of data structures, algorithms and utilities designed to extend the Java Collections Framework. Commons Collections provides a variety of data structures, algorithms and utilities designed to extend the standard Java Collections Framework. It contains a number of classes and interfaces that extend the Java Collections Framework, providing additional functionality and allowing developers to work with collections in more powerful ways.

Apache Commons Collections provides a rich set of data structures and algorithms for manipulating and processing data.
Features:

The Apache Commons Collections library includes the following features:

1. Bag: A Bag is a collection that can contain duplicate elements. It is similar to a Set, but allows for multiple occurrences of the same element.

2. BidiMap: A BidiMap is a map that preserves the order of the elements in both directions, so elements can be looked up by their values as well as their keys.

3. Buffer: A Buffer is a collection that stores elements in a "first in, first out" order. It is often used to implement queues and stacks.

4. CollectionUtils: CollectionUtils is a utility class that contains useful methods for manipulating collections.

5. Comparator: A Comparator is an interface that defines methods for comparing objects. It is used to define the ordering of elements in a collection.

6. IteratorUtils: IteratorUtils is a utility class that provides useful methods for working with Iterators.

7. ListOrderedMap: A ListOrderedMap is a Map that preserves the order of the elements. It is similar to a LinkedHashMap, but it also supports element ordering.

8. MultiMap: A MultiMap is a Map that allows for multiple values for a single key. It is similar to a HashMap, but it can store multiple values for a single key.

9. Predicate: A Predicate is an interface that defines a method for testing an object. It is used to filter elements from a collection.

10. SetUtils: SetUtils is a utility class that provides useful methods for working with Sets.

11. SortedBag: A SortedBag is a Bag that maintains the order of the elements. It is similar to a TreeSet, but it allows for multiple occurrences of the same element.

12. SortedMap: A SortedMap is a Map that maintains the order of the elements. It is similar to a TreeMap, but it allows for multiple entries with the same key.

13. TransformedCollection: A TransformedCollection is a Collection that applies a transformation to all of its elements. It is similar to a List, but it applies a transformation to all of its elements.

14. TypedCollection: A TypedCollection is a Collection that enforces a type on its elements. It is similar to a List, but it ensures that all of its elements are of the same type.

Conclusion

The Apache Commons Collections library provides a rich set of data structures, algorithms and utilities designed to extend the Java Collections Framework. It contains a number of classes and interfaces that extend the Java Collections Framework, providing additional functionality and allowing developers to work with collections in more powerful ways. By using the Apache Commons Collections library, developers can take advantage of the additional features and flexibility of the library to create powerful and efficient applications.
The Apache Commons Collections software does not have any specific technical requirements, as it is written in Java and is platform independent. However, it does require a Java Runtime Environment (JRE) version 1.5 or higher in order to be able to run. In addition, the Apache Commons Collections software should be used in conjunction with other Apache Commons software, such as Commons Lang, Commons Logging, and Commons IO.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian K├Ârner
Noah D.

I've been using Apache Commons Collections for a while now and I must say it is a great library. It offers a wide range of useful utilities, such as a collection of classes that provide extra functionality for collections like Bag, Buffer, Predicated and Unmodifiable collections. It also provides utilities for bean manipulation and cloning, as well as helping to simplify the process of working with collections of Java objects. In addition, the library has been designed to be efficient and robust for multi-threaded applications. I have found it to be an invaluable tool in my development projects.
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