ruby - Convert instance of class org.jruby.RubyArray to class java.util.ArrayList -

i'm new ruby & jruby . want test stuffs of jruby in java code

here code :

import java.util.arraylist; import java.util.hashmap; import org.jruby.embed.localvariablebehavior; import org.jruby.embed.scriptingcontainer;  public class test {     public static void main(string[] args){         scriptingcontainer container = new scriptingcontainer(localvariablebehavior.persistent);         test t = new test();         logstatbean bean = t.new logstatbean();         container.sethomedirectory("classpath:/meta-inf/jruby.home");         container.put("bean", bean);         container.runscriptlet("arr = [1, 2, 3, 4, 5, 6]");         container.runscriptlet("puts arr");         container.runscriptlet("bean.setoutput(arr) ");         system.out.println(bean.getoutput());      }     public class logstatbean {         public arraylist<hashmap<string, object>> getoutput() {             return output;         }         public void setoutput(arraylist<hashmap<string, object>> output) {             this.output = output;         }         public arraylist<hashmap<string, object>> output;      } } 

i cannot set java local variable type arraylist in jruby ,it raise error

typeerror: cannot convert instance of class org.jruby.rubyarray class java.util.arraylist   (root) @ <script>:1 

what have ?

array in ruby (usually) converts java array - either stop expecting arraylist or conversion in ruby ... piece of ruby should helpful :

>> [1, 2, 3].class => array >> [1, 2, 3].to_java.java_class => class [ljava.lang.object; >> [1, 2, 3].to_java('java.lang.integer').java_class => class [ljava.lang.integer; >> java.util.arraylist.new [1, 2, 3] => #<java::javautil::arraylist:0x1b802d73> >> java.util.arrays.aslist([1, 2, 3].to_java) => #<java::javautil::arrays::arraylist:0x10478ebc>