Sort JSONArray Java: Step-by-Step Guide

To sort a JSONArray, you can follow these steps:

1. First, convert the JSONArray to a List object to easily perform sorting operations. You can use the following code to convert JSONArray to List:

JSONArray jsonArray = new JSONArray("[{\"name\":\"Alice\",\"age\":25},{\"name\":\"Bob\",\"age\":30},{\"name\":\"Charlie\",\"age\":20}]");
List<Object> list = jsonArray.toList();

1. Next, use the Collections.sort() method to sort the List. You can customize a Comparator to specify the sorting rule. For example, you can sort in ascending order based on the age field.

Collections.sort(list, new Comparator<Object>() {
    @Override
    public int compare(Object o1, Object o2) {
        JSONObject obj1 = new JSONObject((Map) o1);
        JSONObject obj2 = new JSONObject((Map) o2);
        
        int age1 = obj1.getInt("age");
        int age2 = obj2.getInt("age");
        
        return age1 - age2;
    }
});

1. Finally, convert the sorted List back to a JSONArray. You can use the following code to convert the List to a JSONArray:

JSONArray sortedJsonArray = new JSONArray(list);
System.out.println(sortedJsonArray.toString());

By following the above steps, you can sort the JSONArray.