In this source code example, we will write a Java program that uses the HTTP Client API to trigger a synchronous GET request and display the response code and body.

Java HttpClient GET Example - Synchronous Request

package com.springboot.blog.utils;

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandlers;

public class Main {

    public static void main(String[] args) throws IOException, InterruptedException {

        HttpClient client = HttpClient.newHttpClient();

        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://reqres.in/api/users/2"))
                .build();

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

        System.out.println("Status code: " + response.statusCode());
        System.out.println("\n Body: " + response.body());
    }
}

Output:

Status code: 200

 Body: {"data":{"id":2,"email":"janet.weaver@reqres.in","first_name":"Janet","last_name":"Weaver","avatar":"https://reqres.in/img/faces/2-image.jpg"},"support":{"url":"https://reqres.in/#support-heading","text":"To keep ReqRes free, contributions towards server costs are appreciated!"}}

In the above program, just change the URL to make an HTTP GET request as your requirement.