PrimitiveTypes (in-depth Analysis of Guava Source Codes: PrimitiveTypes)

In -depth analysis of PrimitiveTypes of Guava source code In Java programming, the basic data type (Primitive Types) and its corresponding packaging types are often required.GUAVA is a popular Java open source library that provides many practical tool categories and functions, simplifying the process of developers to handle these types.One of them is Guava's PrimitiveTypes class. The PrimitiveTypes class is an important tool class in the Guava library, which provides a series of methods related to basic data types.In this article, we will thoroughly analyze the source code of PrimitiveTypes and explore its implementation details and usage. To use the PrimitiveTypes class, we need to introduce the relevant dependencies of the Guava library.You can introduce the GUAVA library in Maven in Maven: <dependencies> <!-- Guava --> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>30.0-jre</version> </dependency> </dependencies> After importing dependencies, you can use various methods of using the PrimitiveTypes class in the code. 1. Determine whether the class is the basic data type The PrimitiveTypes class provides several methods to determine whether the class is the basic data type.For example, you can use the `iSprimitive (class <t> Type) method to determine whether the given class is the basic data type.The example is as follows: boolean isIntPrimitive = PrimitiveTypes.isPrimitive(int.class); // true boolean isStringPrimitive = PrimitiveTypes.isPrimitive(String.class); // false 2. Get the packaging type In addition to determining whether the class is the basic data type, PrimitiveTypes also provides methods to obtain the corresponding packaging type.You can use the `Wrap (class <t> Type) method to obtain the packaging type of specified basic data type.The example is as follows: Class<Integer> wrapperType = PrimitiveTypes.wrap(int.class); // Integer.class Class<String> stringWrapperType = PrimitiveTypes.wrap(String.class); // String.class 3. Get the basic data type Similar to obtaining packaging types, PrimityPes also provides methods to obtain basic data types.You can use the method of `Unwrap (class <t> Wrappertype) to obtain the basic data type of specified packaging type.The example is as follows: Class<int> primitiveType = PrimitiveTypes.unwrap(Integer.class); // int.class Class<String> stringPrimitiveType = PrimitiveTypes.unwrap(String.class); // String.class 4. Determine whether it is a packaging type The PrimitiveTypes class also provides a method for judging classes as packaging types.You can use the method of `iswrappertype (class <t> Type) to determine whether the given class is a packaging type.The example is as follows: boolean isIntWrapper = PrimitiveTypes.isWrapperType(Integer.class); // true boolean isStringWrapper = PrimitiveTypes.isWrapperType(String.class); // false Summarize: Through this article, we have a deep understanding of the source code and usage of the PrimitiveTypes class in the Guava library.We have learned that the PrimitiveTypes class provides a series of methods related to basic data types, including judging whether the class is the basic data type, the type of packaging, obtaining basic data types, and judging whether it is a packaging type.With the PrimntedIVETYPES class, we can more conveniently handle the basic data types and its corresponding packaging types to improve development efficiency. Note: The version of the GUAVA library may be different. This article uses the GUAVA 30.0-JRE version library.For more details, see the official documentation. Reference materials: -Gava official document: https://github.com/google/guava/wiki -Gava library source code: https://github.com/google/guava//