如何在java中对json路由执行GET请求

我正试图打印此json

https://coderbyte.com/api/challenges/json/rest-get-simple

，但我收到一个运行时错误

这是我的以下代码：

import java.util.*; 
import java.io.*;
import java.net.*;

class Main {  
  public static void main (String[] args) { 
    System.setProperty("http.agent", "Chrome");
    try { 
      URL url = new URL("https://coderbyte.com/api/challenges/json/rest-get-simple");
      try {
        URLConnection connection = url.openConnection();
        connection.setRequestMethod("GET");
        String line = "";
        InputStream inputStream = connection.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(inputStream);
        StringBuilder response = new StringBuilder();
        while((line = bufferedReader.readLine()) != null) {
          response.append(line);
        }
        bufferedReader.close();
        System.out.println("Response: " + response.toString());
        System.out.println(inputStream);
      } catch (IOException ioEx) {
        System.out.println(ioEx);
      }
    } catch (MalformedURLException malEx) {
      System.out.println(malEx);
    }
  }   
}

错误：

output logs will appear here

Main.java:12: error: cannot find symbol
        connection.setRequestMethod("GET");
                  ^
  symbol:   method setRequestMethod(String)
  location: variable connection of type URLConnection
1 error

Main.java:12: error: cannot find symbol
        connection.setRequestMethod("GET");
                  ^
  symbol:   method setRequestMethod(String)
  location: variable connection of type URLConnection
Main.java:15: error: incompatible types: InputStream cannot be converted to Reader
        BufferedReader bufferedReader = new BufferedReader(inputStream);
                                                           ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
2 errors

---

我只想将跑步、编码、露营等爱好打印为输出。

setRequestMethod

是HttpURLConnection的成员，而不是URLConnection

对于您的特定情况，该行是可选的，可以删除。见：

您还需要包装输入流（一旦修复了第一个错误，就会遇到此错误）：

BufferedReader BufferedReader=新的BufferedReader（新的InputStreamReader（inputStream））

上述更改基于Java 11。
如果您在运行时遇到异常时能够通过某种方式获得更多信息就好了。像一些异常信息，可以引导您找到解决方案。。。嗯@JoachimSauer请检查更新的问题：）