Java Tone Checker

This example uses the HTTP client included with Java 11 and newer.

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
  public static void main(String[] args) throws Exception {
    String apiKey = System.getenv("SAPLING_API_KEY");
    if (apiKey == null || apiKey.isBlank()) {
      throw new IllegalStateException("Set SAPLING_API_KEY first.");
    }

    String payload = "{"
        + "\"text\":\"Really stoked about this! Will it be ready by next week?\""
        + "}";

    HttpRequest request = HttpRequest.newBuilder()
        .uri(URI.create("https://api.sapling.ai/api/v1/tone"))
        .header("Authorization", "Bearer " + apiKey)
        .header("Content-Type", "application/json")
        .POST(HttpRequest.BodyPublishers.ofString(payload))
        .build();

    HttpResponse<String> response = HttpClient.newHttpClient().send(
        request,
        HttpResponse.BodyHandlers.ofString());

    if (response.statusCode() < 200 || response.statusCode() >= 300) {
      throw new IllegalStateException(
          "Sapling API error " + response.statusCode() + ": " + response.body());
    }

    System.out.println(response.body());
  }
}