用jas创建数组[11,22,3,5,9] 1.删除数组第2、3位置的元素并插入一个 8 2.对数组元素进行 降序排序 3.查找数组中是否包含元素 9

在Java中，我们可以使用ArrayList来动态地创建、操作数组。首先，我们假设已经有一个名为arr的ArrayList，初始值为[11, 22, 3, 5, 9]。以下是针对您的需求的操作：

1. 删除第2、3位置的元素，并插入8:

List<Integer> arr = new ArrayList<>(Arrays.asList(11, 22, 3, 5, 9));
// 删除第2和第3个元素 (索引从0开始)
arr.remove(1);
arr.remove(2);

// 插入元素8到当前位置
arr.add(1, 8); // 将8插入到第二个位置

2. 对数组元素进行降序排序:

Collections.sort(arr, Collections.reverseOrder()); // 使用Collections的reverseOrder()函数进行降序排序

注意：这里我们先将数组转换为List，因为ArrayList本身支持排序操作。

3. 查找数组中是否包含元素9:

boolean containsNine = arr.contains(9); // 判断9是否存在于数组中
System.out.println(containsNine); // 输出结果为true或false

相关问题

fetch("https://can.ctrip.com/api/product/hotelfilter", { "headers": { "accept": "application/json, text/javascript, */*; q=0.01", "accept-language": "zh-CN,zh;q=0.9", "authorization": "eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiI3MDQxMiIsInVzZXJuYW1lIjoiWFJUWDA5MjUiLCJ1dWlkIjoiTG9naW5jMTQ4M2NiNy1lMDA0LTQyMWMtYWM2MS04YjVmOGYyYjZiYTciLCJyb2xlTmFtZXMiOlsiUk9MRV9BRE1JTiJdLCJleHAiOjE2NzQwMzU4MDZ9.4uxlgs29BIVP-KKlyHtOkTV-9Dv7muB65MCnA4nstPaVRwqHhT3Imw-8b8eHUdKZhY-l1Z7OHxsw2jAS2NWShQ", "content-type": "application/json", "sec-ch-ua": "\"Not?A_Brand\";v=\"8\", \"Chromium\";v=\"108\", \"Google Chrome\";v=\"108\"", "sec-ch-ua-mobile": "?0", "sec-ch-ua-platform": "\"Windows\"", "sec-fetch-dest": "empty", "sec-fetch-mode": "cors", "sec-fetch-site": "same-origin", "syslng": "zhCN", "x-requested-with": "XMLHttpRequest" }, "referrer": "https://can.ctrip.com/index", "referrerPolicy": "strict-origin-when-cross-origin", "body": "{\"cityid\":\"2\",\"countryid\":\"1\",\"currency\":\"CNY\"}", "method": "POST", "mode": "cors", "credentials": "include" }); 转成 python 代码

import requests

url = "https://can.ctrip.com/api/product/hotelfilter"
headers = {
"accept": "application/json, text/javascript, */*; q=0.01",
"accept-language": "zh-CN,zh;q=0.9",
"authorization": "eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiI3MDQxMiIsInVzZXJuYW1lIjoiWFJUWDA5MjUiLCJ1dWlkIjoiTG9naW5jMTQ4M2NiNy1lMDA0LTQyMWMtYWM2MS04YjVmOGYyYjZiYTciLCJyb2xlTmFtZXMiOlsiUk9MRV9BRE1JTiJdLCJleHAiOjE2NzQwMzU4MDZ9.4uxlgs29BIVP-KKlyHtOkTV-9Dv7muB65MCnA4nstPaVRwqHhT3Imw-8b8eHUdKZhY-l1Z7OHxsw2jAS2NWShQ",
"content-type": "application/json",
"sec-ch-ua": "\"Not?A_Brand\";v=\"8\", \"Chromium\";v=\"108\", \"Google Chrome\";v=\"108\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"Windows\"",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"syslng": "zhCN",
"x-requested-with": "XMLHttpRequest"
}
data = {"cityid":"2","countryid":"1","currency":"CNY"}
response = requests.post(url, headers=headers, json=data)
print(response.json())