如何在Json Object或Array中解析？我的代码哪里有错误？

// 解析Json Object
var jsonObject = '{"name":"John", "age":30, "city":"New York"}';
var obj = JSON.parse(jsonObject);
console.log(obj.name); // 输出：John

// 解析Json Array
var jsonArray = '[{"name":"John", "age":30, "city":"New York"}, {"name":"Jane", "age":25, "city":"London"}]';
var arr = JSON.parse(jsonArray);
console.log(arr[0].name); // 输出：John
console.log(arr[1].name); // 输出：Jane

import json

# 解析Json Object
jsonObject = '{"name":"John", "age":30, "city":"New York"}'
obj = json.loads(jsonObject)
print(obj["name"]) # 输出：John

# 解析Json Array
jsonArray = '[{"name":"John", "age":30, "city":"New York"}, {"name":"Jane", "age":25, "city":"London"}]'
arr = json.loads(jsonArray)
print(arr[0]["name"]) # 输出：John
print(arr[1]["name"]) # 输出：Jane

import com.fasterxml.jackson.databind.ObjectMapper;

// 解析Json Object
String jsonObject = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
ObjectMapper objectMapper = new ObjectMapper();
Map<String, Object> obj = objectMapper.readValue(jsonObject, new TypeReference<Map<String, Object>>(){});
System.out.println(obj.get("name")); // 输出：John

// 解析Json Array
String jsonArray = "[{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}, {\"name\":\"Jane\", \"age\":25, \"city\":\"London\"}]";
List<Map<String, Object>> arr = objectMapper.readValue(jsonArray, new TypeReference<List<Map<String, Object>>>(){});
System.out.println(arr.get(0).get("name")); // 输出：John
System.out.println(arr.get(1).get("name")); // 输出：Jane