Focus on JSweet Core: Detailed explanation of the core framework in the Java class library

Focus on JSweet Core: Detailed explanation of the core framework in the Java class library preface: JSWEET CORE is an open source framework for converting Java code into JavaScript.It provides many powerful tools and libraries that enable developers to develop cross -platform web applications with the advantages of Java language.This article will introduce the core functions and usage methods of JSweet Core in detail, and provide some Java code examples. Introduction to JSWEET CORE JSWEET CORE is the core part of the JSWeet project. It provides a solution for Java developers to convert Java code into JavaScript.JSWEET CORE supports most of the characteristics and grammar of the Java language, while providing some additional features to process the differences between Java and JavaScript. Second, the core function of jsweet core 1. Type conversion: JSWEET CORE can convert data types in Java into the corresponding JavaScript type.For example, convert the integer type of Java into Number types of JavaScript. Example code: int javaInt = 42; double javaDouble = 3.14; String javaString = "Hello JSweet"; // Convert to JavaScript type Number jsNumber = JSweetCore.intToJsNumber(javaInt); Number jsDouble = JSweetCore.doubleToJsNumber(javaDouble); String jsString = JSweetCore.stringToJsString(javaString); 2. Code generation: JSWEET CORE can generate the conversion JavaScript code to the specified output file.Developers can define the format and location of the output file by defining the configuration. Example code: JSweetConfig config = new JSweetConfig(); config.setJsOutputDir("js"); config.setGeneratePackageInfo(true); JSweetTranspiler transpiler = new JSweetTranspiler(config); transpiler.transpile(new File("src/main/java/com/example/Main.java")); 3. Dependent management: JSweet Core supports the dependencies of Java projects in a way similar to Maven.Developers can specify the dependent items required in the project configuration file and automatically include them in the generated JavaScript code. Example code: <dependencies> <dependency> <groupId>com.example</groupId> <artifactId>mylibrary</artifactId> <version>1.0.0</version> </dependency> </dependencies> 4. JavaScript Interaction: JSWEET CORE provides some functions that interact with JavaScript, including calling the JavaScript function, accessing JavaScript objects, etc.This allows developers to use the JavaScript library and API directly in the Java code. Example code: // Call the JavaScript function JSweetCore.exec("console.log('Hello JSweet Core');"); // Visit JavaScript object Object result = JSweetCore.eval("myJavaScriptObject.myProperty;"); How to use JSWEET CORE 1. Install JSWEET CORE: You can get the latest version of JSWEET CORE through Maven or manual download. 2. Configuration item: Create the JSWEET configuration file jsweet.json, and the configuration options of the defined item, including the source code directory, output directory, dependencies, etc. 3. Convert Java code: Use the API provided by JSWEET CORE converting the Java code to JavaScript code and export the generated JavaScript file to the specified output directory. 4. Run JavaScript code: introduce generated JavaScript files generated in web applications and run the corresponding JavaScript code. in conclusion: JSWEET CORE is a powerful tool that helps developers to convert Java code into JavaScript and realize cross -platform web application development.It provides rich functions and flexible configuration options, enabling developers to convert and interact between Java and JavaScript more easily.By making full use of the advantages of Java and the function of JSweet Core, developers can write high -efficiency and maintenance cross -platform web applications. The above is a detailed introduction to the core framework of JSweet Core. At the same time, some Java code examples are provided to help readers better understand and use JSweet Core.I hope that this article can help developers better grasp the JSWEET core and achieve better results in development.