Developing a RESTful web service client

Although curl allows us to quickly test our RESTful web services and is a developer-friendly tool, we need a way for our Java applications to invoke the RESTful web services we develop. Jakarta REST includes a client-side API we can use to develop RESTful web service clients.

The following example illustrates how to use the Jakarta REST client API:

package com.ensode.jakartaeebook.jakartarestintroclient;
//imports omitted for brevity
public class App {
  public static void main(String[] args) {
    App app = new App();
    app.insertCustomer();
  }
  public void insertCustomer() {
    String customerJson = """
                          {
            ...