在java api中获取404

import java.io.BufferedReader;
import java.io.IOException;
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/your-resource");

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

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

            // 获取服务器返回的状态码
            int statusCode = connection.getResponseCode();

            if (statusCode == HttpURLConnection.HTTP_NOT_FOUND) {
                System.out.println("404 Not Found");
            } else {
                // 读取服务器返回的数据
                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String line;
                StringBuilder response = new StringBuilder();
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
                reader.close();

                System.out.println("Response: " + response.toString());
            }

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