1.[代碼]MainClass.java

import java.io.BufferedReader;

import java.io.FileReader;

import javax.script.Invocable;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

public class MainClass {

public static void main(String[] args) throws Exception {

ScriptEngineManager manager = new ScriptEngineManager();

ScriptEngine engine = manager.getEngineByName("jruby");

engine.eval(new BufferedReader(new FileReader("r.rb")));

Invocable invocable = (Invocable) engine;

Object tempconverter = invocable.invokeFunction("getTempConverter");

double degreesCelsius = (Double) invocable.invokeMethod(tempconverter, "f2c", 98.6);

System.out.println(degreesCelsius);

double degreesFahrenheit = (Double) invocable.invokeMethod(tempconverter, "c2f",100.0);

System.out.println(degreesFahrenheit);

}

}

2.[代碼]TempConverter.rb

class TempConverter

def c2f(degrees)

degrees*9.0/5.0+32

end

def f2c(degrees)

(degrees-32)*5.0/9.0

end

end

def getTempConverter

TempConverter.new

end