I am using jruby for the first time and i am trying to load a jar file which later on i will try to send parameters in and run some stuff.
I used a tutorial to write sample hello world java program using the code below
package test_pack;
public class MyFirstJavaProgram {
public static void main(String []args) {
System.out.println("Hello World");
}
}
i place the helloworld.java file inside a test_pack folder and i then packed it using a command to produce a .jar file.
i placed the .jar file into the lib directory of rails, and used the following code to call it
class WebhookController < ApplicationController
require "java"
require "hello.jar"
java_import "hello.MyFirstJavaProgram"
Java::test_pack::MyFirstJavaProgram.main()
def check
end
end
but it gives me the error
cannot load Java class hello.MyFirstJavaProgram
obviously my path is wrong but i do not know how to fix it, any clues welcomed!
java_import "test_pack.MyFirstJavaProgram"
should do the trick.
PS. Also, in java world, you should name your file the same as your class name. In your case your filename should be MyFirstJavaProgram.java, not helloworld.java.