显然， org.json.simple.JSONArray 实现了原始 Iterator。这意味着每个元素都被认为是 Object 。您可以尝试强制转换：

Apparently, org.json.simple.JSONArray implements a raw Iterator. This means that each element is considered to be an Object. You can try to cast:

for(Object o: arr){
    if ( o instanceof JSONObject ) {
        parse((JSONObject)o);
    }
}

这就是Java 1.4中的事情。早些时候。

This is how things were done back in Java 1.4 and earlier.