Convert Jruby HashMap to Java HashMap

Question

I need to pass a hashmap from a jruby function into a Java function. I have tried it this way with no luck.

def rubyfunction
    clazz = com.package.clazz
    params = java.util.HashMap.new({:ID => 1})       
    clazz.javafunction(params)
end


public class clazz{
    public void javafunction(HashMap<String, Object> params){
        params.get("ID") //Gives back null
    }
}

Is there a proper way to convert a jruby hashmap into a java hashmap?

When trying to grab the value with the key of "ID" it gives back null — Matthew Pautzke
– Matthew Pautzke, Commented Aug 20, 2013 at 19:45

Matthew Pautzke · Accepted Answer · 2013-08-21 13:21:43Z

1

After looking for a few hours I came across this link https://kenai.com/projects/jruby/pages/CallingJavaFromJRuby

From that I modified the code, which now works as intended

def rubyfunction
    clazz = com.package.clazz
    params = java.util.HashMap.new()
    value = 1.to_java Java::int
    params.put("ID", value)
    clazz.javafunction(params)
end

answered Aug 21, 2013 at 13:21

Matthew Pautzke

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