How do you call a method in JNI?

You can call an instance method by following these three steps:

1. Your native method calls the JNI function GetObjectClass , which returns the Java class object that is the type of the Java object.
2. Your native method then calls the JNI function GetMethodID , which performs a lookup for the Java method in a given class.

How do you compile Java?

How to compile a java program

1. Open a command prompt window and go to the directory where you saved the java program. Assume it’s C:\.
2. Type ‘javac MyFirstJavaProgram. java’ and press enter to compile your code.

How can we call Java function in C using JNI?

To call a specific Java function from C, you need to do the following:

1. Obtain the class reference using the FindClass(,,) method.
2. Obtain the method IDs of the functions of the class that you want to call using the GetStaticMethodID and GetMethodID function calls.

How do I call a specific function from C in Java?

To call a specific Java function from C, you need to do the following: Obtain the class reference using the FindClass (,,) method. Obtain the method IDs of the functions of the class that you want to call using the GetStaticMethodID and GetMethodID function calls.

How to call Java methods from CPP?

Another simple way to call java methods from CPP is through batch file. Is the method to call exe or bat files from the CPP. Put your class with the java path and the classpath in the batch file and call that batch file from the CPP using system (“batch-file-name.bat”). It is easy and straight forward.

Can you call Java functions in C/C++ using JNI?

I found many articles describing C/C++ function calls in Java using JNI, but very few discussing calling Java functions in C/C++ using JNI. At that time, I decided to write an article so that other people could get help from it. The CTest.cpp file contains the code that calls different functions from Java classes.

Is there a way to compile a C object in Java?

There is a object written in C and compiled as a library. It goes C -> JNI (which starts a JVM) -> Java Function (which is the entry point to a java application) -> Java class -> JNI bridge -> C Object. This is absurd but perfectly valid and works pretty well.