pass several parameters pro ireport

In my Java program I selected a list of values and wanted to pass this list to iReport as a parameter. This parameter would be used in the SQL query: SELECT ... FROM ... WHERE ... IN ($ P {list})

When I pass a code it only works like where = $ P {code}

But I want to pass several codes at the same time how do I do this?

I tried it List codes = new ArrayList ();         codigos.add (1);         codigos.add (2);         codigos.add (3);

    Map<String, Object> parameters = new HashMap<String, Object>();
    parameters.put("codigo", codigos);

But it did not work

I tried to pass a string type "1,2,3" and tb did not work