Guava PrimitiveTypes's implementation principles in the Java Class library

GUAVA is a Java library provided by Google, which provides many practical tool categories and functions. One of them is the PRIMITIVETYPES (original type) module.The PrimitiveTypes module provides a series of operations and conversion methods for the Java original data type, making the processing original type more convenient.This article will explore the principles of Guava PrimitiveTypes in the Java Class library and provide relevant Java code examples. In Java, the original data types include Byte, SHORT, INT, Long, Float, Double, Char, and Boolean. These types are the basis of Java language and are used to store basic data and logic logic.However, because these types do not have the method of wrapper class, in some cases, there may be some inconvenience to the operation and conversion of the original type. Guava's PrimitiveTypes module aims to solve these problems. It provides a series of static methods to convert the original type and packaging type, and perform common original type operations.This module processs the original type similar to a packaging type, and regards each original type as an object. Below, we will understand the implementation principles of Guava PrimitiveTypes through specific code examples. 1. Use Guava's PrimitiveTypes to convert the original type and packaging type: int primitive = 42; // Use Guava to convert the original type into a packaging type Integer wrapper = Ints.checkedCast(primitive); System.out.println (wrapper); // Output: 42 // Use Guava to convert the packaging type into the original type int converted = Ints.checkedCast(wrapper); System.out.println (converted); // Output: 42 In the above example, we use the CheckCast method in the Guava's INTS class to convert the original type int to the packaging type Integer, and then convert the packaging type back to the original type.Such conversion is very useful when dealing with operations that require packaging types. 2. Guava PrimitiveTypes provides some specific types of original operations, such as comparison, sorting and finding: int[] array = {5, 12, 3, 8, 1}; // Get the minimum value in the original array via GUAVA int min = Ints.min(array); System.out.println (min); // Output: 1 // Get the maximum value in the original array via GUAVA int max = Ints.max(array); System.out.println (max); // Output: 12 // Determine whether the original array contains the specified value through the Guava boolean contains = Ints.contains(array, 8); System.out.println (contains); // Output: true // Get the position of the specified value in the original array through the Guava int index = Ints.indexOf(array, 3); System.out.println (index); // Output: 2 In the above examples, we use the MIN, MAX, Contains, and INDEXOF methods in the Guava's INTS class to perform the operation of the original array of the original array. Through the above example, we can see that Guava's PrimitiveTypes module simplifies the conversion between the original type and the packaging type, and provides a specific operation of some original types, making us more convenient and efficient when processing the original type of data. In summary, the principle of GUAVA's PrimitiveTypes module in the Java Class library mainly includes converting the original type and packaging type, and provided some original types of specific operations.Through these functions, we can easily process the original type of data.It is hoped that through the introduction of this article, readers have a deeper understanding of Guava's PrimitiveTypes.