How do java frameworks work with other programming languages?

The Java framework can work with other programming languages ​​through the following three methods: Java Native Interface (JNI) Java Interoperability Framework (JIF) RESTful API integration

Java Frameworks: Working with Other Programming Languages ​​

Java Frameworks are collections of reusable code and tools designed to simplify and accelerate Java application development. Although Java frameworks are primarily written in Java, they work with a variety of other programming languages. Here are three common ways for Java frameworks to interact with other languages:

1. Java Native Interface (JNI)

JNI allows Java code to interact with native languages ​​such as C, C++) to interact with code. This can give users access to platform-specific libraries that improve performance or extend the functionality of existing Java frameworks.

Code sample:

import com.sun.jna.Library;
import com.sun.jna.Native;

public interface MyLibrary extends Library {
    int add(int a, int b);
}

public class JNIExample {
    public static void main(String[] args) {
        MyLibrary library = (MyLibrary) Native.load("libmylibrary", MyLibrary.class);
        int result = library.add(10, 20);
        System.out.println("Result: " + result);
    }
}

2. Java Interoperability Framework (JIF)

JIF provides a A mechanism to implement two-way communication and data exchange between JavaScripts. This allows Java applications to call JavaScript functions and access JavaScript objects, and vice versa.

Code example:

import com.google.javascript.jsapi.JSObject;

public class JIFExample {
    public static void main(String[] args) {
        JSObject jsObject = JSObject.newObject();
        jsObject.setProperty("name", "John");
        System.out.println("Name: " + jsObject.getProperty("name"));
    }
}

3. RESTful API integration

The Java framework provides native support for RESTful API. Allowing them to interact with applications written in other languages ​​(such as Python, C#). By using HTTP requests and responses, Java applications can call RESTful API methods and obtain or modify data.

Code sample:

import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;

public class RestExample {
    public static void main(String[] args) throws Exception {
        HttpClient client = HttpClientBuilder.create().build();
        HttpGet request = new HttpGet("https://reqres.in/api/users/1");
        HttpResponse response = client.execute(request);
        System.out.println(response.getStatusLine());
        System.out.println(EntityUtils.toString(response.getEntity()));
    }
}

Practical case:

In the following practical case, the Spring Boot framework (Java) and Python Script Integration:

Scenario: Read data from a SQL database and use a Python script to transform the data.

Steps:

1. Create a Java application using Spring Boot.
2. Connect to a SQL database and retrieve data.
3. Use the subprocess Python module to call the Python script.
4. Return transformed data from the Python script into the Java application.

This integration allows Java applications to access Python's specialized processing capabilities, thereby enhancing the overall functionality of the application.

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