Created
August 17, 2009 10:11
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// https://scripting.dev.java.net/servlets/ProjectDocumentList | |
// javac JRuby.java | |
// java -cp .:jruby-engine.jar:jruby.jar JRuby rloader.rb Loader # => 40 | |
// java -cp .:jruby-engine.jar:jruby.jar JRuby rloader.rb Loader2 # => 80 | |
import javax.script.ScriptContext; | |
import javax.script.ScriptEngine; | |
import javax.script.ScriptEngineManager; | |
import javax.script.ScriptException; | |
class JRuby{ | |
static public void main(String[] args){ | |
ScriptEngineManager m = new ScriptEngineManager(); | |
ScriptEngine jruby = m.getEngineByName("jruby"); | |
ScriptContext context = jruby.getContext(); | |
context.setAttribute("input", "20", ScriptContext.ENGINE_SCOPE); | |
try{ | |
jruby.eval("require '" + args[0] + "'"); | |
System.out.println( | |
jruby.eval(args[1] + ".apply($input)", context)); | |
} | |
catch (ScriptException e){ e.printStackTrace(); } | |
} | |
} |
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// javac -Xlint:unchecked Loader.java | |
// jar -cf example.jar Loader.class | |
// java Loader example.jar Loader # => 40 | |
// java Loader example.jar Loader2 # => 80 | |
class Loader{ | |
static public void main(String[] args) throws | |
ClassNotFoundException, | |
NoSuchMethodException, | |
IllegalAccessException, | |
java.lang.reflect.InvocationTargetException | |
{ | |
// Class<?> c = ClassLoader.getSystemClassLoader().loadClass(args[0]); | |
java.net.URL[] urls = new java.net.URL[1]; | |
urls[0] = ClassLoader.getSystemResource(args[0]); | |
Class<?> c = new java.net.URLClassLoader(urls).loadClass(args[1]); | |
System.out.println( | |
c.getMethod("apply", String.class).invoke(null, "20")); | |
} | |
static public int apply(String i){ | |
return Integer.parseInt(i) * 2; | |
} | |
} | |
class Loader2{ | |
static public int apply(String i){ | |
return Integer.parseInt(i) * 4; | |
} | |
} |
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module Loader | |
module_function | |
def apply i | |
i.to_i * 2 | |
end | |
end | |
module Loader2 | |
module_function | |
def apply i | |
i.to_i * 4 | |
end | |
end |
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