Class ReverseComparator<E>
java.lang.Object
org.apache.commons.collections4.comparators.ReverseComparator<E>
- Type Parameters:
E- the type of objects compared by this comparator
- All Implemented Interfaces:
Serializable,Comparator<E>
Reverses the order of another comparator by reversing the arguments
to its
compare method.- Since:
- 2.0
- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionCreates a comparator that compares objects based on the inverse of their natural ordering.ReverseComparator(Comparator<? super E> comparator) Creates a comparator that inverts the comparison of the given comparator. -
Method Summary
Modifier and TypeMethodDescriptionintCompares two objects in reverse order.booleanReturnstrueiff that Object is aComparatorwhose ordering is known to be equivalent to mine.inthashCode()Implement a hash code for this comparator that is consistent withequals.Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface java.util.Comparator
reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
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Constructor Details
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ReverseComparator
public ReverseComparator()Creates a comparator that compares objects based on the inverse of their natural ordering. Using this Constructor will create a ReverseComparator that is functionally identical to the Comparator returned by java.util.Collections.reverseOrder().- See Also:
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ReverseComparator
Creates a comparator that inverts the comparison of the given comparator. If you pass innull, the ReverseComparator defaults to reversing the natural order, as perCollections.reverseOrder().- Parameters:
comparator- Comparator to reverse
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Method Details
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compare
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equals
Returnstrueiff that Object is aComparatorwhose ordering is known to be equivalent to mine.This implementation returns
trueiff<em>object</em>.{@link Object#getClass() getClass()}equalsthis.getClass(), and the underlying comparators are equal. Subclasses may want to override this behavior to remain consistent with theequalscontract.- Specified by:
equalsin interfaceComparator<E>- Overrides:
equalsin classObject- Parameters:
object- the object to compare to- Returns:
- true if equal
- Since:
- 3.0
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hashCode
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