Converting JsonNode to java array

Moving my comment to an answer, as it got upvoted a lot.

This should do what the OP needed:

new ObjectMapper().convertValue(jsonNode, ArrayList.class)

A quick way to do this using the tree-model... convert the JSON string into a tree of JsonNode's:

ObjectMapper mapper = new ObjectMapper();
JsonNode rootNode = mapper.readTree("...<JSON string>...");

Then extract the child nodes and convert them into lists:

List<Double> x = mapper.convertValue(rootNode.get("x"), ArrayList.class);
List<Double> y = mapper.convertValue(rootNode.get("y"), ArrayList.class);

A slight longer, but arguable better way to do this is to define a class representing the JSON structure you expect:

public class Request {
    List<Double> x;
    List<Double> y;
}

Then deserialized directly as follows:

Request request = mapper.readValue("...<JSON string>...", Request.class);

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