如何访问已经在Javascript中解析的JSON对象？

{
  "name": "Alice",
  "age": 30,
  "isStudent": false,
  "courses": ["Math", "Science"]
}

let jsonString = '{"name":"Alice","age":30,"isStudent":false,"courses":["Math","Science"]}';
let jsonObject = JSON.parse(jsonString);

console.log(jsonObject.name); // 输出: Alice
console.log(jsonObject['age']); // 输出: 30

let nestedJsonString = '{"person":{"name":"Bob","address":{"city":"New York","zip":10001}}}';
let nestedJsonObject = JSON.parse(nestedJsonString);

console.log(nestedJsonObject.person.address.city); // 输出: New York

console.log(jsonObject.courses[0]); // 输出: Math
console.log(jsonObject.courses[1]); // 输出: Science

for (let key in jsonObject) {
  if (jsonObject.hasOwnProperty(key)) {
    console.log(key + ": " + jsonObject[key]);
  }
}

try {
  let jsonObject = JSON.parse(jsonString);
} catch (error) {
  console.error("Error parsing JSON:", error);
}