Analysis of the technical principle of the SHIMS framework in the Java class library

Analysis of the technical principle of the SHIMS framework in the Java class library Brief introduction The SHIMS framework is a commonly used technology in the Java library to solve the compatibility problem between different versions of Java.It enables the ability to use the same API under different Java versions by packaging and agency packaging and agents on the bottom API.This article will analyze the technical principles of the SHIMS framework in detail and provide some Java code examples. 1. The role of the shims framework The main role of the Shims framework is to solve the compatibility problems that the Java program may occur in different operating environments.Because different Java versions will introduce new APIs or change existing API behaviors, if programs are developed on specific versions of Java, and it may occur on other versions, compatibility problems may occur.The SHIMS framework can run normally on any version of the Java of any version of the Java, which provides better compatibility. 2. The principle of the shims framework The principle of the Shims framework depends on two main technologies: packaging and agent. -Packing: The SHIMS framework will pack a specific API to hide the details implemented by the underlying layer and provide a unified interface to the upper layer call.In this way, no matter which version of the program is developed on the Java, the upper code can use the same API without worrying about the difference in the implementation of the underlying implementation. -Egent: The SHIMS framework also uses proxy technology to forward the API called the upper code call to the bottom layer of the specific API.When the program calls the API provided by the SHIMS framework, the Shims framework will be called according to the current Java version to select the appropriate underlying API to achieve compatibility on different versions of Java. 3. Example of the use of shims framework Below is a simple example, showing how to use the Shims framework to deal with the compatibility of different versions of Java. import com.example.shims.ShimsFramework; public class Main { public static void main(String[] args) { ShimsFramework shims = new ShimsFramework(); // Call the API provided by the Shims framework String version = shims.getJavaVersion(); System.out.println ("Current Java version:" + Version); } } In the above example, we can obtain the current running Java version through the SHIMS framework's `GetjavaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaVaversion ().Regardless of the program is executed on any version of the Java, the Shims framework will choose the correct underlying API to call to return the corresponding Java version information. in conclusion The Shims framework is a common technology that solves compatibility between different versions of Java.It provides the ability to use the same API on any version of Java through packaging and proxy under the bottom API.Using the SHIMS framework can help developers avoid compatibility issues caused by version differences, improve the stability and portability of the program. references: - https://www.example.com/shims-documentation