Package it.unimi.dsi.fastutil.chars
Interface CharComparator
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- All Superinterfaces:
java.util.Comparator<java.lang.Character>
- All Known Implementing Classes:
AbstractCharComparator
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface CharComparator extends java.util.Comparator<java.lang.Character>
A type-specificComparator
; provides methods to compare two primitive types both as objects and as primitive types.Note that
fastutil
provides a corresponding abstract class that can be used to implement this interface just by specifying the type-specific comparator.- See Also:
Comparator
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Default Methods Deprecated Methods Modifier and Type Method Description int
compare(char k1, char k2)
Compares its two primitive-type arguments for order.default int
compare(java.lang.Character ok1, java.lang.Character ok2)
Deprecated.Please use the corresponding type-specific method instead.static <U extends java.lang.Comparable<? super U>>
CharComparatorcomparing(Char2ObjectFunction<? extends U> keyExtractor)
Accepts a function that extracts aComparable
sort key from a primitive key, and returns a comparator that compares by that sort key.static <U extends java.lang.Comparable<? super U>>
CharComparatorcomparing(Char2ObjectFunction<? extends U> keyExtractor, java.util.Comparator<? super U> keyComparator)
Accepts a function that extracts a sort key from a primitive key, and returns a comparator that compares by that sort key using the specifiedComparator
.static CharComparator
comparingDouble(Char2DoubleFunction keyExtractor)
Accepts a function that extracts andouble
sort key from a primitive key, and returns a comparator that compares by that sort key.static CharComparator
comparingInt(Char2IntFunction keyExtractor)
Accepts a function that extracts anint
sort key from a primitive key, and returns a comparator that compares by that sort key.static CharComparator
comparingLong(Char2LongFunction keyExtractor)
Accepts a function that extracts anlong
sort key from a primitive key, and returns a comparator that compares by that sort key.default CharComparator
reversed()
default CharComparator
thenComparing(CharComparator second)
Return a new comparator that first uses this comparator, then uses the second comparator if this comparator compared the two elements as equal.default java.util.Comparator<java.lang.Character>
thenComparing(java.util.Comparator<? super java.lang.Character> second)
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Method Detail
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compare
int compare(char k1, char k2)
Compares its two primitive-type arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.- Returns:
- a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
- See Also:
Comparator
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reversed
default CharComparator reversed()
- Specified by:
reversed
in interfacejava.util.Comparator<java.lang.Character>
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compare
@Deprecated default int compare(java.lang.Character ok1, java.lang.Character ok2)
Deprecated.Please use the corresponding type-specific method instead.- Specified by:
compare
in interfacejava.util.Comparator<java.lang.Character>
- Implementation Specification:
- This implementation delegates to the corresponding type-specific method.
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thenComparing
default CharComparator thenComparing(CharComparator second)
Return a new comparator that first uses this comparator, then uses the second comparator if this comparator compared the two elements as equal.- See Also:
Comparator.thenComparing(Comparator)
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thenComparing
default java.util.Comparator<java.lang.Character> thenComparing(java.util.Comparator<? super java.lang.Character> second)
- Specified by:
thenComparing
in interfacejava.util.Comparator<java.lang.Character>
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comparing
static <U extends java.lang.Comparable<? super U>> CharComparator comparing(Char2ObjectFunction<? extends U> keyExtractor)
Accepts a function that extracts aComparable
sort key from a primitive key, and returns a comparator that compares by that sort key.The returned comparator is serializable if the specified function is also serializable.
- Parameters:
keyExtractor
- the function used to extract theComparable
sort key- Returns:
- a comparator that compares by an extracted key
- Throws:
java.lang.NullPointerException
- ifkeyExtractor
isnull
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comparing
static <U extends java.lang.Comparable<? super U>> CharComparator comparing(Char2ObjectFunction<? extends U> keyExtractor, java.util.Comparator<? super U> keyComparator)
Accepts a function that extracts a sort key from a primitive key, and returns a comparator that compares by that sort key using the specifiedComparator
.The returned comparator is serializable if the specified function and comparator are both serializable.
- Parameters:
keyExtractor
- the function used to extract the sort keykeyComparator
- theComparator
used to compare the sort key- Returns:
- a comparator that compares by an extracted key using the specified
Comparator
- Throws:
java.lang.NullPointerException
- ifkeyExtractor
orkeyComparator
arenull
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comparingInt
static CharComparator comparingInt(Char2IntFunction keyExtractor)
Accepts a function that extracts anint
sort key from a primitive key, and returns a comparator that compares by that sort key.The returned comparator is serializable if the specified function is also serializable.
- Parameters:
keyExtractor
- the function used to extract the integer sort key- Returns:
- a comparator that compares by an extracted key
- Throws:
java.lang.NullPointerException
- ifkeyExtractor
isnull
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comparingLong
static CharComparator comparingLong(Char2LongFunction keyExtractor)
Accepts a function that extracts anlong
sort key from a primitive key, and returns a comparator that compares by that sort key.The returned comparator is serializable if the specified function is also serializable.
- Parameters:
keyExtractor
- the function used to extract the long sort key- Returns:
- a comparator that compares by an extracted key
- Throws:
java.lang.NullPointerException
- ifkeyExtractor
isnull
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comparingDouble
static CharComparator comparingDouble(Char2DoubleFunction keyExtractor)
Accepts a function that extracts andouble
sort key from a primitive key, and returns a comparator that compares by that sort key.The returned comparator is serializable if the specified function is also serializable.
- Parameters:
keyExtractor
- the function used to extract the double sort key- Returns:
- a comparator that compares by an extracted key
- Throws:
java.lang.NullPointerException
- ifkeyExtractor
isnull
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