Introduction to Javaslang framework

Javaslang is a Java framework focusing on functional programming.It provides a set of core concepts of unsatisfactory data types and functional programming to help programmers write elegant, simple and efficient code in Java. The main features of Javaslang are: 1. Unsudians: The types of data in Javaslang are immutable, which means that once it is created, it cannot be modified.This immorality makes the code more robust, because it eliminates many common concurrency problems and is easier to reason and test. 2. Functional programming: Javaslang encourages the use of pure functions, that is, functions without side effects.This programming style makes the code easier to understand, test and maintain, and can make full use of the Lambda expression and Stream API introduced by the Java 8. 3. Advanced functions: Javaslang provides many advanced functions commonly used in functional programming, such as mapping (MAP), filtering (Filter), folding (FOLD), etc.These functions can greatly simplify the code and make it more readable. 4. Abnormal treatment: Javaslang introduced a special Either type for better treatment of abnormalities.Either can represent the success of success or failure of failure, avoid using traditional abnormal mechanisms to make the code clearer. 5. Interoperability of gathering with Java: Javaslang provides seamless interoperability with the Java collection class, which can easily convert the two, and use the function of Javaslang to enhance the Java collection. The following is a simple Java code example to demonstrate how to use some features of functional programming in Javaslang: import javaslang.collection.List; public class FunctionalExample { public static void main(String[] args) { // Create an unspeakable list List<Integer> numbers = List.of(1, 2, 3, 4, 5); // Use MAP to multiply each element by 2 List<Integer> doubledNumbers = numbers.map(n -> n * 2); // Use Filter to screen out elements greater than 3 List<Integer> filteredNumbers = doubledNumbers.filter(n -> n > 3); // Use fold to calculate all elements and the harmony int sum = filteredNumbers.fold(0, (a, b) -> a + b); System.out.println (SUM); // Output: 14 } } In the above example, we first created an unspeakable list `numbers`, and then use the` Map` function to multiply each element by 2, and then use the `Filter` function to scree the element greater than 3.Finally, the harmony of all elements was calculated using the `Fold` function, and the results were printed. In short, Javaslang is a powerful Java framework that can help developers use functional programming paradigms to write elegant, simple and efficient code.It provides many useful functions and types, so that Java programmers can better use the benefits of functional programming.