Eclipse Collections of Java Library's main library framework technical principles

Eclipse Collections of Java Library Main Library Framework Technical Principles Eclipse Collections is a high -performance, scalable and easy -to -use Java set library.It provides a set of functional data structures to replace the set class in the Java standard library, which aims to provide better performance and better API design. The main library framework technical principles of Eclipse Collections include: 1. Unable variable collection class: One of the core concepts of Eclipse Collections is the uncharacteristic set class, that is, a set that cannot be modified after creation.The advantage of this design is that thread security can be used in multi -threaded environment without worrying about concurrency problems.The unsatisfactory set class provides efficient memory utilization and fast data access by using unsatisfactory objects and persistent data structures. The following is an example of creating unchanged list: ImmutableList<String> list = Lists.immutable.of("apple", "banana", "orange"); 2. Functional programming style: Eclipse CollectionS supports functional programming styles, providing rich operating methods, such as MAP, Filter, Reduce, etc.These operations can be directly applied to the collection class, which is used to process and convective elements in the set.The functional programming style makes the code more concise, readable, and supports chain calls, making the code easier to understand and maintain. The following is an example of a square treatment of each element in the list: ImmutableList<Integer> numbers = Lists.immutable.of(1, 2, 3, 4, 5); ImmutableList<Integer> squares = numbers.collect(i -> i * i); 3. Basic type specialization: The collection classes in the Java standard library can only store object types, while Eclipse Collections provides basic types of specialized collection classes, which can significantly improve the performance and memory utilization rate of basic types.These specialized collection classes provide independent implementation for each basic type, avoiding the problem of overhead and additional memory occupation of the use of boxes. The following is an example of using a specialized collection class to store the integer data: IntList intList = IntLists.mutable.with(1, 2, 3, 4, 5); int sum = intList.sum(); 4. Batch operation: Eclipse Collections provides a wealth of batch operation methods for batch processing and conversion of the collection.These methods can improve performance through parallel execution and provide multiple algorithms to achieve choice.Batch operations also allow custom operations to achieve more complicated needs. The following is an example of batch operations using batch operations to operate the elements in the list: MutableList<Integer> numbers = Lists.mutable.of(1, 2, 3, 4, 5); MutableList<Integer> transformed = numbers.collectIf(i -> i % 2 == 0, i -> i * 2); By using the main library framework technical principles of Eclipse Collections, developers can easily process and operate collecting data, and obtain better performance and better code readability.It is a powerful and flexible collection class library that provides a better choice for Java developers.