Use JSWEET CORE: Operation Guide to Framework in the Java Library
JSWEET CORE is a framework that converts the Java code into TypeScript/Javascript code, which allows developers to use the Java class library in the browser environment.This article will introduce how to use the JSweet Core framework and provide some Java code examples.
### Step 1: Installation and configuration
First, we need to install the JSWEET core framework.You can install JSWEET CORE by executing the following commands at the terminal:
npm install -g jsweet-core
After the installation is complete, we need to configure the JSWEET CORE framework.Create a file called `jsweet.json` under the root directory of the project and configure it in the file.The following is a basic configuration example:
json
{
"name": "myApp",
"sources": [
"src/main/java"
],
"jsOutputDir" : "dist"
}
In this example, the `name` attribute specifies the name of the project, and the` Sources` attribute specifies the position of the Java code, and the `jsoutputdir` attribute specifies the output directory of the generated javascript file.
### Step 2: Write java code
Next, we can write the Java code and use the framework in the Java class library.The following is a simple example:
import static def.dom.Globals.document;
public class HelloWorld {
public static void main(String[] args) {
document.body.innerHTML = "<h1>Hello, World!</h1>";
}
}
In this example, we used the `DOCUMENT` object in the class library of the` DEF.DOM.globals` class library to access the DOM, and set its `InnerHtml` property to" Hello, World! ".
### Step 3: Convert and build
Once we complete the writing of the Java code, we can use the JSweet Core framework to convert and build.In the terminal, enter the root directory of the project and execute the following command:
jsweet
JSWEET CORE will read the `jsweet.json` configuration file and convert the Java code to TypeScript/JavaScript code.The conversion result will be saved in the specified output directory in the configuration file.
### Step 4: Test in the browser
Finally, we can test the code in the browser.We can create a HTML file and load the conversion JavaScript file.The following is a simple example:
html
<!DOCTYPE html>
<html>
<head></head>
<body>
<script src="dist/HelloWorld.js"></script>
</body>
</html>
Open this HTML file in the browser, and you will see a page titled "Hello, World!".
The above is the guide to operate the Java class library with the JSWEET CORE framework.Through this framework, we can use the Java class library in the browser environment to achieve functions.Hope this article is helpful to you!
