Explore by the application and technical principles of Excalibur Collections in the Java class library
Explore by the application and technical principles of Excalibur Collections in the Java class library
Excalibur Collections is a powerful and efficient Java collection framework. It provides many additional function and performance optimization, so that developers can easily handle and operate various collection types.This article will explore the application scope of Excalibur Collections and the technical principles behind it, and provide some Java code examples to help readers better understand.
1. The application range of Excalibur Collections
1. Provide additional collection types: Excalibur Collections provides developers with additional collection types, such as ShortObjecthashMap, IntoBjecthashMap, etc. These collection types have better performance and memory efficiency in specific scenarios.By using these collection types, developers can choose a collection structure that is more suitable for their needs to improve the performance and maintenance of code.
2. Provide efficient collection operations: EXCALIBUR Collections optimized in the collection operation, providing some efficient operation methods and algorithms, such as fast searching, sorting and filtering.The implementation of these operations has been carefully optimized, and can have better performance in the scenario of large data.
3. Provide a set of thread security: Excalibur Collections also provides the type of thread security set, such as Threadsafehashset, ThreadsafearrayList, etc.These collection types can ensure the consistency and security of the data when using in a multi -threaded environment, reduce the workload of developers in processing thread synchronization, and improve the reliability and scalability of the code.
Second, technical principles of Excalibur Collections
1. Hachtings based on the opening address method: Some collection types in Excalibur Collections, such as ObjectHashSet and ObjecthashMap, are implemented with hash tables based on the open addressing method.Open addressing method By storing conflict elements in adjacent empty slots, not using data structures such as linked lists to solve hash conflicts, reducing the time cost of memory occupation and access elements.
2. Quickly searching data structure: The collection types such as IntoBjectMap and LongObjectMap in EXCALIBUR Collection use array -based data structures such as array to achieve fast search operations.This data structure can store elements by using the pre -distributed array, and uses an array -based access method to find the element search operation within the constant time, which improves the search efficiency.
3. Application of concurrent programming technology: The thread security set type in Excalibur Collection uses concurrent programming technology to ensure the consistency and security of the data.These collection types can be used to use the mechanisms such as locks and atomic operations to achieve the complicated access control of the collection, ensuring data consistency in the multi -threaded environment, and providing high -performance concurrency processing capabilities.
Third, sample code
Below is a simple example code that demonstrates how to use the ObjectHashset type in Excalibur Collections:
import org.eclipse.collections.impl.set.mutable.ObjectHashSet;
public class ExcaliburCollectionsExample {
public static void main(String[] args) {
// Create an ObjectHashset object
ObjectHashSet<String> set = new ObjectHashSet<>();
// Add elements
set.add("Apple");
set.add("Banana");
set.add("Orange");
// Print the collection size
System.out.println("Size: " + set.size()); // 输出: Size: 3
// Traversing collection
for (String element : set) {
System.out.println(element);
}
}
}
The above code demonstrates how to use the Objecthashset collection type in Excalibur Collections.First of all, we created an ObjectHashset object and used the ADD method to add elements to the collection.Then, obtain the collection through the SIZE method, and use For cycling to traverse the elements in the set and print output.
Summarize:
This article discusses the application range of Excalibur Collections in the Java library and the technical principles behind it.By using Excalibur Collections, developers can choose a collection type that is more suitable for their needs, and use the efficient operations and thread security characteristics it provides to improve the performance and maintenance of code.It is hoped that readers can have a deeper understanding of Excalibur Collections through this article and can be used and used in actual projects.
