Java's Comparable Interface

Опубликовано: 08 Май 2021
на канале: Giolytics Learning

250

What is Java's Comparable interface, when should you implement this interface, and what are the benefits of Comparable objects?

The Comparable interface imposes the natural ordering of instances of a class implementing it. The interface defines a single method, compareTo, that returns an integer. For example, if you call obj1.compareTo(obj2), the method should return zero if obj1 equals obj2, a negative value if obj1 is less than obj2, or a positive value if obj1 is greater than obj2.

You should consider implementing the Comparable interface in your class if there is a notion of natural ordering in your class instances.

Some benefits of Comparable objects are that they can be sorted in a collection and that they can be stored in a data structure that requires order, such as TreeMap and TreeSet.

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