Forcing elements of List to be converted as java.lang.Long

Tim Fox timvolpe at
Wed Nov 26 21:45:26 UTC 2014

Hello folks,

I have a Java method:

public void foo(List<Long> list) {
   System.out.println("elem0 is " + list.get(0));

Which I call from JS with a JS array:[123]);

This results in a ClassCastException as Nashorn converts the JS Array 
into a java.util.List instance which contains a java.lang.Integer 
element (not java.lang.Long)

Is there any way to force Nashorn to convert the array elements as Longs 
not Integers?


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