How can I utilize Java? util in Java programming language?

Util meaning in Java refers to the utilities. The “java. util” package generally is essential for various utility classes and data structures.

To sort a collection of custom objects in Java you would need to follow several steps under Java:- Implement comparator Interface  Firstly, creating a custom Comparator is necessary which can define the sorting logic. Here is the example given:-

Import java. util.Comparator;

Public class CustomComparator implements Comparator {

    @Override

    Public int compare(CustomObject obj1, CustomObject obj2) {

        // Define your logic for comparing multiple criteria

        // Example: Compare based on attribute1 first, then attribute2

        Int result = obj1.getAttribute1().compareTo(obj2.getAttribute1());

        If (result == 0) {

            Result = obj1.getAttribute2().compareTo(obj2.getAttribute2());

        }

        // Add more comparisons as needed

        Return result;

    }

}

Sort the collection by using the “collection. sort()” method with your custom comparator for sorting the collection. Here is how you can do so:-

Import java. util.Collections;

Import java. util.List;

Public class Main {

    Public static void main(String[] args) {

        List custom objects = /* Initialize your list */;

        // Sort the list using the custom comparator

        Collections. sort(custom objects, new CustomComparator());

        // Your list is now sorted based on multiple criteria

    }

}