Here is an example of using the FloatNode class from the com.fasterxml.jackson.databind package in the Jackson library for Java:

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

public class Main {
    public static void main(String[] args) {
        JsonNode floatNode = new FloatNode(3.14);
        System.out.println(floatNode.asText()); // prints "3.14"
    }
}

In this example, we first import the JsonNode and FloatNode classes from the com.fasterxml.jackson.databind package.

Then, we create a new instance of FloatNode with a value of 3.14 and assign it to floatNode variable.

Finally, we print the text representation of floatNode by calling the asText() method, which returns the string representation of the float value "3.14".