//Assuming that your object is a valid List object, you can use: Collections.singletonList(object) -- Returns an immutable list containing only the specified object.  List<Object> list = Collections.singletonList(object); //If you want it in a specific datatype, use Stream.of(object):  List<String> list = Stream.of(object).map(Object::toString).collect(Collectors.toList()) //Similarly, you can change the method in the map to convert to the datatype you need.

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