pass several parameters to the ireport

Question

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

when I pass a code only it works as Where= $P{code}

but I want to pass several codes at the same time as I do this?

I tried to List code = new Arraylist(); add(1) code; add(2) code; add(3 code);

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

but it didn’t work

I tried to pass a string like "1,2,3" and tb didn’t work