Utility Class for Counting Occurrences in Java/Groovy Using JSONObject

During testing of a lottery activity, the author needed a way to tally each draw result and compare it with expected values, finding traditional switch‑case approaches cumbersome; instead, they created a utility class that uses the JSONObject containsKey method to increment counts or insert new entries.

The provided code defines a CountTool class with several static count methods:

static def count(JSONObject counts, Object object) – increments the count for a single object with a default increment of 1.

static def count(JSONObject counts, Object object, int num) – increments the count using a specified default value.

static def count(List list, def str) – returns the number of times a specific element appears in a list.

static def count(List list) – groups list elements, sorts them, and outputs each element with its occurrence count.

The implementation relies on counts.put(object, Integer.valueOf(counts.getOrDefault(object.toString(), num))) and Java streams for grouping and sorting.

Note: The approach uses toString() , which works for basic types and strings; for other objects it may produce hash codes, so additional handling or method overloading may be required.