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Showing content from https://docs.oracle.com/en/java/javase/24/docs/api/java.base/java/util/Comparator.html below:

Comparator (Java SE 24 & JDK 24)

Type Parameters:

T - the type of objects that may be compared by this comparator

All Known Implementing Classes:

Collator, RuleBasedCollator

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

• Method Summary

  int

  Compares its two arguments for order.

  Accepts a function that extracts a

  Comparable

  sort key from a type

  T

  , and returns a

  Comparator<T>

  that compares by that sort key.

  Accepts a function that extracts a sort key from a type

  T

  , and returns a

  Comparator<T>

  that compares by that sort key using the specified

  Comparator

  .

  Accepts a function that extracts a double sort key from a type T, and returns a Comparator<T> that compares by that sort key.

  Accepts a function that extracts an int sort key from a type T, and returns a Comparator<T> that compares by that sort key.

  Accepts a function that extracts a long sort key from a type T, and returns a Comparator<T> that compares by that sort key.

  boolean

  Indicates whether some other object is "equal to" this comparator.

  Returns a comparator that compares

  Comparable

  objects in natural order.

  Returns a null-friendly comparator that considers null to be less than non-null.

  Returns a null-friendly comparator that considers null to be greater than non-null.

  Returns a comparator that imposes the reverse ordering of this comparator.

  Returns a comparator that imposes the reverse of the natural ordering.

  Returns a lexicographic-order comparator with another comparator.

  Returns a lexicographic-order comparator with a function that extracts a Comparable sort key.

  Returns a lexicographic-order comparator with a function that extracts a key to be compared with the given Comparator.

  Returns a lexicographic-order comparator with a function that extracts a double sort key.

  Returns a lexicographic-order comparator with a function that extracts an int sort key.

  Returns a lexicographic-order comparator with a function that extracts a long sort key.

• Method Details
  • compare
  • equals
  • reversed
  • thenComparing
  • thenComparing
  • thenComparing
  • thenComparingInt
  • thenComparingLong
  • thenComparingDouble
  • reverseOrder
  • naturalOrder
  • nullsFirst
  • nullsLast
  • comparing
  • comparing
  • comparingInt
  • comparingLong
  • comparingDouble

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