选择第一个JSON数组子值

const jsonArray = [1, 2, 3, 4];
const firstValue = jsonArray[0];
console.log(firstValue); // 输出: 1

import json

jsonArray = [1, 2, 3, 4]
firstValue = jsonArray[0]
print(firstValue) # 输出: 1

import org.json.JSONArray;
import org.json.JSONException;

public class Main {
    public static void main(String[] args) throws JSONException {
        String json = "[1, 2, 3, 4]";
        JSONArray jsonArray = new JSONArray(json);
        int firstValue = jsonArray.getInt(0);
        System.out.println(firstValue); // 输出: 1
    }
}