Web Reference: Unlike Comparable, a comparator may optionally permit comparison of null arguments, while maintaining the requirements for an equivalence relation. This interface is a member of the Java Collections Framework. Aug 18, 2025 · In Java, both Comparable and Comparator interfaces are used for sorting objects. The main difference between Comparable and Comparator is: Comparable: It is used to define the natural ordering of the objects within the class. Comparator: It is used to define custom sorting logic externally. Comparisons in Java are quite easy, until they’re not. When working with custom types, or trying to compare objects that aren’t directly comparable, we need to make use of a comparison strategy. We can build one simply by making use of the Comparator or Comparableinterfaces.
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