Here is an example of using the BigIntegerNode class in the com.fasterxml.jackson.databind package in Java:

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.BigIntegerNode;

import java.math.BigInteger;

public class Example {
    public static void main(String[] args) throws Exception {
        BigInteger bigInt = new BigInteger("123456789123456789123456789");
        JsonNode bigIntNode = BigIntegerNode.valueOf(bigInt);
        System.out.println(bigIntNode);
    }
}

This example creates an instance of the BigInteger class, which is a large integer with arbitrary precision. It also creates an instance of the BigIntegerNode class by calling valueOf method. With this, you can use the BigIntegerNode to represent big integers in JSON.

In this example, the valueOf method is used to create a BigIntegerNode object that wraps the BigInteger object.

This example prints the BigIntegerNode as a json string to the console.

With this example, you can see how you can use the BigIntegerNode to represent large integers in JSON and use it with JsonNode.