Understanding Comparable Interface

Comparable introduction

Collections.sort() method sorts the given List in ascending order. But the question is, how does the sort() method decide which element is smaller and which one is larger?

Each wrapper class(Integer, Double, or Long), String class, and Date class implements an interface called Comparable. This interface contains a compareTo(T o) method which is used by sorting methods to sort the Collection. This method returns a negative integer, zero, or a positive integer if this object is less than, equal to, or greater than the object passed as an ...