Core Workflow

Sorting JSON arrays in Java follows three core steps:

Step	Action	Overview
1	Prepare input	Organize your unsorted JSON data into a processable structure
2	Sort entries	Use Java's built-in collection utiliteis to apply custom sorting rules
3	Generate output	Export the sorted JSON data for use or display

Sort JSON Entries

To sort JSON objects within an array, first convert the array to a sortable list of JSON objects, then apply a custom comparator:

// Initialize your unsorted input JSON array
JSONArray unsortedInput = new JSONArray();
List<JSONObject> jsonEntries = new ArrayList<>();

// Populate list from the input JSON array
for (int i = 0; i < unsortedInput.length(); i++) {
    jsonEntries.add(unsortedInput.getJSONObject(i));
}

// Sort with custom ordering logic
Collections.sort(jsonEntries, (first, second) -> {
    // Update the field name and logic to match your sorting requirements
    // Example: sort lexicographically by a string field `name`
    return first.getString("name").compareTo(second.getString("name"));
});

Output Sorted Result

After sorting, you can output the result directly or rebuild a sorted JSON array for further processing:

// Print each sorted JSON object
for (JSONObject entry : jsonEntries) {
    System.out.println(entry.toString());
}

// Optional: Rebuild a sorted JSONArray for subsequent operations
JSONArray sortedJsonOutput = new JSONArray(jsonEntries);