java - 为什么从 java 类调用 java 接口(interface)的 jRuby 实现时会出现 NoMethodError 错误？

Question

我遵循了类似问题(链接:How to get from JRuby a correctly typed ruby implementation of a Java interface?)的建议，但这根本没有改变症状。

Java 运行时异常:

org.jruby.exceptions.RaiseException: (NoMethodError) undefined method `doWork' for main:Object

Java执行代码:

    Object worker= engine.get("worker");
    MyInterface interfacedWorker = ((Invocable) engine).getInterface(worker,
            MyInterface.class);
    interfacedWorker.doWork(1,2);

java接口(interface):

public interface MyInterface
{
    public void doWork (int a, int b)
}

jRuby 类:

class Worker_31415_2
  java_implements 'com.myApp.MyInterface'
  def doWork(a, b)
    p a, b
  end
end
worker=Worker_31415_2.new

Answer 1

您可能应该使用这种形式:-

require 'java'
require_relative 'classes'

class Worker
  include com.myApp.MyInterface

  java_signature 'doWork(int a, int b)'    
  def doWork(a, b)
    p a, b
  end
end

Worker.new.doWork(1, 2)

根据您的示例编译的java接口(interface)的Classes.jar，对我有用!