尝试使用重新调整发出get请求时，无法为类java.lang.Object创建调用适配器

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class Main {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com");

            // 打开连接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法为GET
            connection.setRequestMethod("GET");

            // 获取响应码
            int responseCode = connection.getResponseCode();

            // 读取响应内容
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 输出响应内容
            System.out.println(response.toString());

            // 关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

public class Main {
    public static void main(String[] args) {
        try {
            // 创建HttpClient对象
            HttpClient httpClient = HttpClientBuilder.create().build();

            // 创建HttpGet对象，并设置URL
            HttpGet httpGet = new HttpGet("http://example.com");

            // 发送get请求
            HttpResponse response = httpClient.execute(httpGet);

            // 获取响应内容
            HttpEntity entity = response.getEntity();
            String responseString = EntityUtils.toString(entity, "UTF-8");

            // 输出响应内容
            System.out.println(responseString);

            // 关闭连接
            httpClient.getConnectionManager().shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}