What is the role of jni in java

jni meaning:

The main function of jni is that the jni standard has become part of the java platform since jdk1.1. It provides a series of APIs that allow java to interact with other languages, realizing the Call functions in other languages ​​from java code. Generally, we use jni to call code in c or c.

Usage example:

public class JniTest {
    static{
        System.loadLibrary("MyNativeDll");
    }
 
    public static native void callCppMethod();
 
    public static void main(String[] args) {
        System.out.println("DLL path:"+System.getProperty("java.library.path"));
        callCppMethod();
    }
}

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