The methods in this class all throw a NullPointerException if the specified array reference is null, except where noted.
The documentation for the methods contained in this class includes briefs description of the implementations. Such descriptions should be regarded as implementation notes, rather than parts of the specification. Implementors should feel free to substitute other algorithms, so long as the specification itself is adhered to. (For example, the algorithm used by sort(Object[]) does not have to be a mergesort, but it does have to be stable.)
This class is a member of the Java Collections Framework.
| Method Summary | ||
static List<T> |
asList(T... a) Returns a fixed-size list backed by the specified array. |
|
static int |
binarySearch(byte[] a, byte key) Searches the specified array of bytes for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(byte[] a, int fromIndex, int toIndex, byte key) Searches a range of
the specified array of bytes for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(char[] a, char key) Searches the specified array of chars for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(char[] a, int fromIndex, int toIndex, char key) Searches a range of
the specified array of chars for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(double[] a, double key) Searches the specified array of doubles for the specified value using
the binary search algorithm. |
|
static int |
binarySearch(double[] a, int fromIndex, int toIndex, double key) Searches a range of
the specified array of doubles for the specified value using
the binary search algorithm. |
|
static int |
binarySearch(float[] a, float key) Searches the specified array of floats for the specified value using
the binary search algorithm. |
|
static int |
binarySearch(float[] a, int fromIndex, int toIndex, float key) Searches a range of
the specified array of floats for the specified value using
the binary search algorithm. |
|
static int |
binarySearch(int[] a, int key) Searches the specified array of ints for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(int[] a, int fromIndex, int toIndex, int key) Searches a range of
the specified array of ints for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(Object[] a, int fromIndex, int toIndex, Object key) Searches a range of
the specified array for the specified object using the binary
search algorithm. |
|
static int |
binarySearch(Object[] a, Object key) Searches the specified array for the specified object using the binary
search algorithm. |
|
static int |
binarySearch(long[] a, int fromIndex, int toIndex, long key) Searches a range of
the specified array of longs for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(long[] a, long key) Searches the specified array of longs for the specified value using the
binary search algorithm. |
|
static int |
binarySearch(short[] a, int fromIndex, int toIndex, short key) Searches a range of
the specified array of shorts for the specified value using
the binary search algorithm. |
|
static int |
binarySearch(short[] a, short key) Searches the specified array of shorts for the specified value using
the binary search algorithm. |
|
static int |
binarySearch(T[] a, int fromIndex, int toIndex, T key, Comparator<? super T> c) Searches a range of
the specified array for the specified object using the binary
search algorithm. |
|
static int |
binarySearch(T[] a, T key, Comparator<? super T> c) Searches the specified array for the specified object using the binary
search algorithm. |
|
static boolean[] |
copyOf(boolean[] original, int newLength) Copies the specified array, truncating or padding with false (if necessary)
so the copy has the specified length. |
|
static byte[] |
copyOf(byte[] original, int newLength) Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. |
|
static char[] |
copyOf(char[] original, int newLength) Copies the specified array, truncating or padding with null characters (if necessary)
so the copy has the specified length. |
|
static double[] |
copyOf(double[] original, int newLength) Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. |
|
static float[] |
copyOf(float[] original, int newLength) Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. |
|
static int[] |
copyOf(int[] original, int newLength) Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. |
|
static long[] |
copyOf(long[] original, int newLength) Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. |
|
static short[] |
copyOf(short[] original, int newLength) Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. |
|
static T[] |
copyOf(T[] original, int newLength) Copies the specified array, truncating or padding with nulls (if necessary)
so the copy has the specified length. |
|
static T[] |
copyOf(U[] original, int newLength, Class<? extends T> newType) Copies the specified array, truncating or padding with nulls (if necessary)
so the copy has the specified length. |
|
static boolean[] |
copyOfRange(boolean[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static byte[] |
copyOfRange(byte[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static char[] |
copyOfRange(char[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static double[] |
copyOfRange(double[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static float[] |
copyOfRange(float[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static int[] |
copyOfRange(int[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static long[] |
copyOfRange(long[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static short[] |
copyOfRange(short[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static T[] |
copyOfRange(T[] original, int from, int to) Copies the specified range of the specified array into a new array. |
|
static T[] |
copyOfRange(U[] original, int from, int to, Class<? extends T> newType) Copies the specified range of the specified array into a new array. |
|
static boolean |
deepEquals(Object[] a1, Object[] a2) Returns true if the two specified arrays are deeply
equal to one another. |
|
static int |
deepHashCode(Object[] a) Returns a hash code based on the "deep contents" of the specified
array. |
|
static String |
deepToString(Object[] a) Returns a string representation of the "deep contents" of the specified
array. |
|
static boolean |
equals(boolean[] a, boolean[] a2) Returns true if the two specified arrays of booleans are
equal to one another. |
|
static boolean |
equals(byte[] a, byte[] a2) Returns true if the two specified arrays of bytes are
equal to one another. |
|
static boolean |
equals(char[] a, char[] a2) Returns true if the two specified arrays of chars are
equal to one another. |
|
static boolean |
equals(double[] a, double[] a2) Returns true if the two specified arrays of doubles are
equal to one another. |
|
static boolean |
equals(float[] a, float[] a2) Returns true if the two specified arrays of floats are
equal to one another. |
|
static boolean |
equals(int[] a, int[] a2) Returns true if the two specified arrays of ints are
equal to one another. |
|
static boolean |
equals(Object[] a, Object[] a2) Returns true if the two specified arrays of Objects are
equal to one another. |
|
static boolean |
equals(long[] a, long[] a2) Returns true if the two specified arrays of longs are
equal to one another. |
|
static boolean |
equals(short[] a, short[] a2) Returns true if the two specified arrays of shorts are
equal to one another. |
|
static void |
fill(boolean[] a, boolean val) Assigns the specified boolean value to each element of the specified
array of booleans. |
|
static void |
fill(boolean[] a, int fromIndex, int toIndex, boolean val) Assigns the specified boolean value to each element of the specified
range of the specified array of booleans. |
|
static void |
fill(byte[] a, byte val) Assigns the specified byte value to each element of the specified array
of bytes. |
|
static void |
fill(byte[] a, int fromIndex, int toIndex, byte val) Assigns the specified byte value to each element of the specified
range of the specified array of bytes. |
|
static void |
fill(char[] a, char val) Assigns the specified char value to each element of the specified array
of chars. |
|
static void |
fill(char[] a, int fromIndex, int toIndex, char val) Assigns the specified char value to each element of the specified
range of the specified array of chars. |
|
static void |
fill(double[] a, double val) Assigns the specified double value to each element of the specified
array of doubles. |
|
static void |
fill(double[] a, int fromIndex, int toIndex, double val) Assigns the specified double value to each element of the specified
range of the specified array of doubles. |
|
static void |
fill(float[] a, float val) Assigns the specified float value to each element of the specified array
of floats. |
|
static void |
fill(float[] a, int fromIndex, int toIndex, float val) Assigns the specified float value to each element of the specified
range of the specified array of floats. |
|
static void |
fill(int[] a, int val) Assigns the specified int value to each element of the specified array
of ints. |
|
static void |
fill(int[] a, int fromIndex, int toIndex, int val) Assigns the specified int value to each element of the specified
range of the specified array of ints. |
|
static void |
fill(Object[] a, int fromIndex, int toIndex, Object val) Assigns the specified Object reference to each element of the specified
range of the specified array of Objects. |
|
static void |
fill(Object[] a, Object val) Assigns the specified Object reference to each element of the specified
array of Objects. |
|
static void |
fill(long[] a, int fromIndex, int toIndex, long val) Assigns the specified long value to each element of the specified
range of the specified array of longs. |
|
static void |
fill(long[] a, long val) Assigns the specified long value to each element of the specified array
of longs. |
|
static void |
fill(short[] a, int fromIndex, int toIndex, short val) Assigns the specified short value to each element of the specified
range of the specified array of shorts. |
|
static void |
fill(short[] a, short val) Assigns the specified short value to each element of the specified array
of shorts. |
|
static int |
hashCode(boolean[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(byte[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(char[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(double[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(float[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(int[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(Object[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(long[] a) Returns a hash code based on the contents of the specified array. |
|
static int |
hashCode(short[] a) Returns a hash code based on the contents of the specified array. |
|
static void |
sort(byte[] a) Sorts the specified array of bytes into ascending numerical order. |
|
static void |
sort(byte[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of bytes into
ascending numerical order. |
|
static void |
sort(char[] a) Sorts the specified array of chars into ascending numerical order. |
|
static void |
sort(char[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of chars into
ascending numerical order. |
|
static void |
sort(double[] a) Sorts the specified array of doubles into ascending numerical order. |
|
static void |
sort(double[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of doubles into
ascending numerical order. |
|
static void |
sort(float[] a) Sorts the specified array of floats into ascending numerical order. |
|
static void |
sort(float[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of floats into
ascending numerical order. |
|
static void |
sort(int[] a) Sorts the specified array of ints into ascending numerical order. |
|
static void |
sort(int[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of ints into
ascending numerical order. |
|
static void |
sort(Object[] a) Sorts the specified array of objects into ascending order, according to
the natural ordering
of its elements. |
|
static void |
sort(Object[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of objects into
ascending order, according to the
natural ordering of its
elements. |
|
static void |
sort(long[] a) Sorts the specified array of longs into ascending numerical order. |
|
static void |
sort(long[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of longs into
ascending numerical order. |
|
static void |
sort(short[] a) Sorts the specified array of shorts into ascending numerical order. |
|
static void |
sort(short[] a, int fromIndex, int toIndex) Sorts the specified range of the specified array of shorts into
ascending numerical order. |
|
static void |
sort(T[] a, int fromIndex, int toIndex, Comparator<? super T> c) Sorts the specified range of the specified array of objects according
to the order induced by the specified comparator. |
|
static void |
sort(T[] a, Comparator<? super T> c) Sorts the specified array of objects according to the order induced by
the specified comparator. |
|
static String |
toString(boolean[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(byte[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(char[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(double[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(float[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(int[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(Object[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(long[] a) Returns a string representation of the contents of the specified array. |
|
static String |
toString(short[] a) Returns a string representation of the contents of the specified array. |
|
| Methods inherited from class java.lang.Object |
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The < relation does not provide a total order on
all floating-point values; although they are distinct numbers
-0.0 == 0.0 is true and a NaN value
compares neither less than, greater than, nor equal to any
floating-point value, even itself. To allow the sort to
proceed, instead of using the < relation to
determine ascending numerical order, this method uses the total
order imposed by Double.compareTo(). This ordering
differs from the < relation in that
-0.0 is treated as less than 0.0 and
NaN is considered greater than any other floating-point value.
For the purposes of sorting, all NaN values are considered
equivalent and equal.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The < relation does not provide a total order on
all floating-point values; although they are distinct numbers
-0.0 == 0.0 is true and a NaN value
compares neither less than, greater than, nor equal to any
floating-point value, even itself. To allow the sort to
proceed, instead of using the < relation to
determine ascending numerical order, this method uses the total
order imposed by Double.compareTo(). This ordering
differs from the < relation in that
-0.0 is treated as less than 0.0 and
NaN is considered greater than any other floating-point value.
For the purposes of sorting, all NaN values are considered
equivalent and equal.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The < relation does not provide a total order on
all floating-point values; although they are distinct numbers
-0.0f == 0.0f is true and a NaN value
compares neither less than, greater than, nor equal to any
floating-point value, even itself. To allow the sort to
proceed, instead of using the < relation to
determine ascending numerical order, this method uses the total
order imposed by Float.compareTo(). This ordering
differs from the < relation in that
-0.0f is treated as less than 0.0f and
NaN is considered greater than any other floating-point value.
For the purposes of sorting, all NaN values are considered
equivalent and equal.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
The < relation does not provide a total order on
all floating-point values; although they are distinct numbers
-0.0f == 0.0f is true and a NaN value
compares neither less than, greater than, nor equal to any
floating-point value, even itself. To allow the sort to
proceed, instead of using the < relation to
determine ascending numerical order, this method uses the total
order imposed by Float.compareTo(). This ordering
differs from the < relation in that
-0.0f is treated as less than 0.0f and
NaN is considered greater than any other floating-point value.
For the purposes of sorting, all NaN values are considered
equivalent and equal.
The sorting algorithm is a tuned quicksort, adapted from Jon L. Bentley and M. Douglas McIlroy's "Engineering a Sort Function", Software-Practice and Experience, Vol. 23(11) P. 1249-1265 (November 1993). This algorithm offers n*log(n) performance on many data sets that cause other quicksorts to degrade to quadratic performance.
This sort is guaranteed to be stable: equal elements will not be reordered as a result of the sort.
The sorting algorithm is a modified mergesort (in which the merge is omitted if the highest element in the low sublist is less than the lowest element in the high sublist). This algorithm offers guaranteed n*log(n) performance.
This sort is guaranteed to be stable: equal elements will not be reordered as a result of the sort.
The sorting algorithm is a modified mergesort (in which the merge is omitted if the highest element in the low sublist is less than the lowest element in the high sublist). This algorithm offers guaranteed n*log(n) performance.
This sort is guaranteed to be stable: equal elements will not be reordered as a result of the sort.
The sorting algorithm is a modified mergesort (in which the merge is omitted if the highest element in the low sublist is less than the lowest element in the high sublist). This algorithm offers guaranteed n*log(n) performance.
This sort is guaranteed to be stable: equal elements will not be reordered as a result of the sort.
The sorting algorithm is a modified mergesort (in which the merge is omitted if the highest element in the low sublist is less than the lowest element in the high sublist). This algorithm offers guaranteed n*log(n) performance.