Conexão HTTP Simples e Serialização com Java

Main.java

import com.google.gson.Gson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Array;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        HttpURLConnection connection = null;
        BufferedReader reader = null;

        try {
            URL url = new URL("https://api-pacientes.herokuapp.com/pacientes");

            connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");

            reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

            StringBuilder response = new StringBuilder();
            String line;

            while((line = reader.readLine()) != null){
                response.append(line);
            }

            Gson gson = new Gson();

            Pessoa[] pessoas = gson.fromJson(response.toString(), Pessoa[].class);

            for( Pessoa pessoa : pessoas) {
                System.out.println(pessoa);
            }

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            connection.disconnect();
        }
    }
}

Pessoa.java

public class Pessoa {

    private String nome;
    private int peso;
    private double altura;
    private int gordura;
    private double imc;

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public int getPeso() {
        return peso;
    }

    public void setPeso(int peso) {
        this.peso = peso;
    }

    public double getAltura() {
        return altura;
    }

    public void setAltura(double altura) {
        this.altura = altura;
    }

    public int getGordura() {
        return gordura;
    }

    public void setGordura(int gordura) {
        this.gordura = gordura;
    }

    public double getImc() {
        return imc;
    }

    public void setImc(double imc) {
        this.imc = imc;
    }

    @Override
    public String toString() {
        return "Pessoa{" +
                "nome='" + nome + '\'' +
                ", peso=" + peso +
                ", altura=" + altura +
                ", gordura=" + gordura +
                ", imc=" + imc +
                '}';
    }
}

WebScrapping.java

import org.jsoup.Connection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

import java.io.IOException;

public class WebScrapping {

    public static void main(String[] args) {


        try {
            Connection conn = Jsoup.connect("https://cursos.alura.com.br/forum/topico-buscando-dados-da-rede-129220");
            Document document = conn.get();

            Elements element = document.getElementsByClass("topic-post-content");

            System.out.println(element.select("p").first());

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}