How to Add Days to Date in Java?

Date is the most dependent element when it comes to the creation of applications like to-do lists, assistants, or calendars. The retrieval and customization of the current or provided date is very straightforward. However, it becomes a little messy when the developer...

How to Sort a Map by Value in Java?

Map is the efficient data structure that stores user-provided data according to the natural order in key-value pairs. It assigns a unique key to each map element. This key is utilized to retrieve the corresponding values from the map. Due to this “key-value” pair...

How to Work With a List of Lists in Java?

The List is a collection of data that stores information in a specific order. The unique number is assigned to each List item known as the index number. The single index in the list can store a single object or list of objects. A list that has a nested structure (list...