Java Comparable is an interface that is implemented by classes whose objects can be compared to each other. It defines the Java method Java compareTo(), which is used to compare two objects for ordering. Implementing the Comparable interface allows objects to be sorted in collections such as Java TreeSet or Java ArrayList using methods like Java Collections.sort(). Introduced in Java 1995 with Java 1.0, Comparable is essential for sorting and ordering objects in Java applications.

https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html