| public class java.util Arrays
|
Java SE 6 |
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.
| version | 1.71, 04/21/06 |
| since | 1.2 |
| Methods | |||||||||||||||||||||
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| public static List<T> | asList(Object[] a) Details
Returns a fixed-size list backed by the specified array. (Changes to
the returned list "write through" to the array.) This method acts
as bridge between array-based and collection-based APIs, in
combination with Collection#toArray. The returned list is
serializable and implements RandomAccess.
This method also provides a convenient way to create a fixed-size list initialized to contain several elements:
List<String> stooges = Arrays.asList("Larry", "Moe", "Curly");
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| public static int | binarySearch(long[] a, long key) Details
Searches the specified array of longs for the specified value using the
binary search algorithm. The array must be sorted (as
by the #sort(long[]) method) prior to making this call. If it
is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(long[] a, int fromIndex, int toIndex, long key) Details
Searches a range of
the specified array of longs for the specified value using the
binary search algorithm.
The range must be sorted (as
by the int, int) method)
prior to making this call. If it
is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found.
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| public static int | binarySearch(int[] a, int key) Details
Searches the specified array of ints for the specified value using the
binary search algorithm. The array must be sorted (as
by the #sort(int[]) method) prior to making this call. If it
is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(int[] a, int fromIndex, int toIndex, int key) Details
Searches a range of
the specified array of ints for the specified value using the
binary search algorithm.
The range must be sorted (as
by the int, int) method)
prior to making this call. If it
is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found.
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| public static int | binarySearch(short[] a, short key) Details
Searches the specified array of shorts for the specified value using
the binary search algorithm. The array must be sorted
(as by the #sort(short[]) method) prior to making this call. If
it is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(short[] a, int fromIndex, int toIndex, short key) Details
Searches a range of
the specified array of shorts for the specified value using
the binary search algorithm.
The range must be sorted
(as by the int, int) method)
prior to making this call. If
it is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(char[] a, char key) Details
Searches the specified array of chars for the specified value using the
binary search algorithm. The array must be sorted (as
by the #sort(char[]) method) prior to making this call. If it
is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(char[] a, int fromIndex, int toIndex, char key) Details
Searches a range of
the specified array of chars for the specified value using the
binary search algorithm.
The range must be sorted (as
by the int, int) method)
prior to making this call. If it
is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(byte[] a, byte key) Details
Searches the specified array of bytes for the specified value using the
binary search algorithm. The array must be sorted (as
by the #sort(byte[]) method) prior to making this call. If it
is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(byte[] a, int fromIndex, int toIndex, byte key) Details
Searches a range of
the specified array of bytes for the specified value using the
binary search algorithm.
The range must be sorted (as
by the int, int) method)
prior to making this call. If it
is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(double[] a, double key) Details
Searches the specified array of doubles for the specified value using
the binary search algorithm. The array must be sorted
(as by the #sort(double[]) method) prior to making this call.
If it is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found. This method considers all NaN values to be
equivalent and equal.
| ||||||||||||||||||||
| public static int | binarySearch(double[] a, int fromIndex, int toIndex, double key) Details
Searches a range of
the specified array of doubles for the specified value using
the binary search algorithm.
The range must be sorted
(as by the int, int) method)
prior to making this call.
If it is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found. This method considers all NaN values to be
equivalent and equal.
| ||||||||||||||||||||
| public static int | binarySearch(float[] a, float key) Details
Searches the specified array of floats for the specified value using
the binary search algorithm. The array must be sorted
(as by the #sort(float[]) method) prior to making this call. If
it is not sorted, the results are undefined. If the array contains
multiple elements with the specified value, there is no guarantee which
one will be found. This method considers all NaN values to be
equivalent and equal.
| ||||||||||||||||||||
| public static int | binarySearch(float[] a, int fromIndex, int toIndex, float key) Details
Searches a range of
the specified array of floats for the specified value using
the binary search algorithm.
The range must be sorted
(as by the int, int) method)
prior to making this call. If
it is not sorted, the results are undefined. If the range contains
multiple elements with the specified value, there is no guarantee which
one will be found. This method considers all NaN values to be
equivalent and equal.
| ||||||||||||||||||||
| public static int | binarySearch(Object[] a, Object key) Details
Searches the specified array for the specified object using the binary
search algorithm. The array must be sorted into ascending order
according to the
natural ordering
of its elements (as by the
#sort(Object[]) method) prior to making this call.
If it is not sorted, the results are undefined.
(If the array contains elements that are not mutually comparable (for
example, strings and integers), it cannot be sorted according
to the natural ordering of its elements, hence results are undefined.)
If the array contains multiple
elements equal to the specified object, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int | binarySearch(Object[] a, int fromIndex, int toIndex, Object key) Details
Searches a range of
the specified array for the specified object using the binary
search algorithm.
The range must be sorted into ascending order
according to the
natural ordering
of its elements (as by the
int, int) method) prior to making this
call. If it is not sorted, the results are undefined.
(If the range contains elements that are not mutually comparable (for
example, strings and integers), it cannot be sorted according
to the natural ordering of its elements, hence results are undefined.)
If the range contains multiple
elements equal to the specified object, there is no guarantee which
one will be found.
| ||||||||||||||||||||
| public static int<T> | binarySearch(Object[] a, Object key, Comparator c) Details
Searches the specified array for the specified object using the binary
search algorithm. The array must be sorted into ascending order
according to the specified comparator (as by the
sort(T[], Comparator)
method) prior to making this call. If it is
not sorted, the results are undefined.
If the array contains multiple
elements equal to the specified object, there is no guarantee which one
will be found.
| ||||||||||||||||||||
| public static int<T> | binarySearch(Object[] a, int fromIndex, int toIndex, Object key, Comparator c) Details
Searches a range of
the specified array for the specified object using the binary
search algorithm.
The range must be sorted into ascending order
according to the specified comparator (as by the
sort(T[], int, int, Comparator)
method) prior to making this call.
If it is not sorted, the results are undefined.
If the range contains multiple elements equal to the specified object,
there is no guarantee which one will be found.
| ||||||||||||||||||||
| public static Object[]<T> | copyOf(Object[] original, int newLength) Details
Copies the specified array, truncating or padding with nulls (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain null.
Such indices will exist if and only if the specified length
is greater than that of the original array.
The resulting array is of exactly the same class as the original array.
| ||||||||||||||||||||
| public static Object[]<T, U> | copyOf(Object[] original, int newLength, Class newType) Details
Copies the specified array, truncating or padding with nulls (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain null.
Such indices will exist if and only if the specified length
is greater than that of the original array.
The resulting array is of the class newType.
| ||||||||||||||||||||
| public static byte[] | copyOf(byte[] original, int newLength) Details
Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain (byte)0.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static short[] | copyOf(short[] original, int newLength) Details
Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain (short)0.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static int[] | copyOf(int[] original, int newLength) Details
Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain 0.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static long[] | copyOf(long[] original, int newLength) Details
Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain 0L.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static char[] | copyOf(char[] original, int newLength) Details
Copies the specified array, truncating or padding with null characters (if necessary)
so the copy has the specified length. For all indices that are valid
in both the original array and the copy, the two arrays will contain
identical values. For any indices that are valid in the copy but not
the original, the copy will contain '\\u000'. Such indices
will exist if and only if the specified length is greater than that of
the original array.
| ||||||||||||||||||||
| public static float[] | copyOf(float[] original, int newLength) Details
Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain 0f.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static double[] | copyOf(double[] original, int newLength) Details
Copies the specified array, truncating or padding with zeros (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain 0d.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static boolean[] | copyOf(boolean[] original, int newLength) Details
Copies the specified array, truncating or padding with false (if necessary)
so the copy has the specified length. For all indices that are
valid in both the original array and the copy, the two arrays will
contain identical values. For any indices that are valid in the
copy but not the original, the copy will contain false.
Such indices will exist if and only if the specified length
is greater than that of the original array.
| ||||||||||||||||||||
| public static Object[]<T> | copyOfRange(Object[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
null is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
The resulting array is of exactly the same class as the original array.
| ||||||||||||||||||||
| public static Object[]<T, U> | copyOfRange(Object[] original, int from, int to, Class newType) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
null is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
The resulting array is of the class newType.
| ||||||||||||||||||||
| public static byte[] | copyOfRange(byte[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
(byte)0 is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static short[] | copyOfRange(short[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
(short)0 is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static int[] | copyOfRange(int[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
0 is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static long[] | copyOfRange(long[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
0L is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static char[] | copyOfRange(char[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
'\\u000' is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static float[] | copyOfRange(float[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
0f is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static double[] | copyOfRange(double[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
0d is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static boolean[] | copyOfRange(boolean[] original, int from, int to) Details
Copies the specified range of the specified array into a new array.
The initial index of the range (from) must lie between zero
and original.length, inclusive. The value at
original[from] is placed into the initial element of the copy
(unless from == original.length or from == to).
Values from subsequent elements in the original array are placed into
subsequent elements in the copy. The final index of the range
(to), which must be greater than or equal to from,
may be greater than original.length, in which case
false is placed in all elements of the copy whose index is
greater than or equal to original.length - from. The length
of the returned array will be to - from.
| ||||||||||||||||||||
| public static boolean | deepEquals(Object[] a1, Object[] a2) Details
Returns true if the two specified arrays are deeply
equal to one another. Unlike the #equals(Object[],Object[])
method, this method is appropriate for use with nested arrays of
arbitrary depth.
Two array references are considered deeply equal if both are null, or if they refer to arrays that contain the same number of elements and all corresponding pairs of elements in the two arrays are deeply equal. Two possibly null elements e1 and e2 are deeply equal if any of the following conditions hold:
If either of the specified arrays contain themselves as elements either directly or indirectly through one or more levels of arrays, the behavior of this method is undefined.
| ||||||||||||||||||||
| public static int | deepHashCode(Object[] a) Details
Returns a hash code based on the "deep contents" of the specified
array. If the array contains other arrays as elements, the
hash code is based on their contents and so on, ad infinitum.
It is therefore unacceptable to invoke this method on an array that
contains itself as an element, either directly or indirectly through
one or more levels of arrays. The behavior of such an invocation is
undefined.
For any two arrays a and b such that Arrays.deepEquals(a, b), it is also the case that Arrays.deepHashCode(a) == Arrays.deepHashCode(b). The computation of the value returned by this method is similar to
that of the value returned by
| ||||||||||||||||||||
| public static String | deepToString(Object[] a) Details
Returns a string representation of the "deep contents" of the specified
array. If the array contains other arrays as elements, the string
representation contains their contents and so on. This method is
designed for converting multidimensional arrays to strings.
The string representation consists of a list of the array's elements, enclosed in square brackets ("[]"). Adjacent elements are separated by the characters ", " (a comma followed by a space). Elements are converted to strings as by String.valueOf(Object), unless they are themselves arrays. If an element e is an array of a primitive type, it is converted to a string as by invoking the appropriate overloading of Arrays.toString(e). If an element e is an array of a reference type, it is converted to a string as by invoking this method recursively. To avoid infinite recursion, if the specified array contains itself as an element, or contains an indirect reference to itself through one or more levels of arrays, the self-reference is converted to the string "[...]". For example, an array containing only a reference to itself would be rendered as "[[...]]". This method returns "null" if the specified array is null.
| ||||||||||||||||||||
| public static boolean | equals(long[] a, long[] a2) Details
Returns true if the two specified arrays of longs are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null.
| ||||||||||||||||||||
| public static boolean | equals(int[] a, int[] a2) Details
Returns true if the two specified arrays of ints are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null.
| ||||||||||||||||||||
| public static boolean | equals(short[] a, short[] a2) Details
Returns true if the two specified arrays of shorts are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null.
| ||||||||||||||||||||
| public static boolean | equals(char[] a, char[] a2) Details
Returns true if the two specified arrays of chars are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null.
| ||||||||||||||||||||
| public static boolean | equals(byte[] a, byte[] a2) Details
Returns true if the two specified arrays of bytes are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null.
| ||||||||||||||||||||
| public static boolean | equals(boolean[] a, boolean[] a2) Details
Returns true if the two specified arrays of booleans are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null.
| ||||||||||||||||||||
| public static boolean | equals(double[] a, double[] a2) Details
Returns true if the two specified arrays of doubles are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null. Two doubles d1 and d2 are considered equal if: new Double(d1).equals(new Double(d2))(Unlike the == operator, this method considers NaN equals to itself, and 0.0d unequal to -0.0d.)
| ||||||||||||||||||||
| public static boolean | equals(float[] a, float[] a2) Details
Returns true if the two specified arrays of floats are
equal to one another. Two arrays are considered equal if both
arrays contain the same number of elements, and all corresponding pairs
of elements in the two arrays are equal. In other words, two arrays
are equal if they contain the same elements in the same order. Also,
two array references are considered equal if both are null. Two floats f1 and f2 are considered equal if: new Float(f1).equals(new Float(f2))(Unlike the == operator, this method considers NaN equals to itself, and 0.0f unequal to -0.0f.)
| ||||||||||||||||||||
| public static boolean | equals(Object[] a, Object[] a2) Details
Returns true if the two specified arrays of Objects are
equal to one another. The two arrays are considered equal if
both arrays contain the same number of elements, and all corresponding
pairs of elements in the two arrays are equal. Two objects e1
and e2 are considered equal if (e1==null ? e2==null
: e1.equals(e2)). In other words, the two arrays are equal if
they contain the same elements in the same order. Also, two array
references are considered equal if both are null.
| ||||||||||||||||||||
| public static void | fill(long[] a, long val) Details
Assigns the specified long value to each element of the specified array
of longs.
| ||||||||||||||||||||
| public static void | fill(long[] a, int fromIndex, int toIndex, long val) Details
Assigns the specified long value to each element of the specified
range of the specified array of longs. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(int[] a, int val) Details
Assigns the specified int value to each element of the specified array
of ints.
| ||||||||||||||||||||
| public static void | fill(int[] a, int fromIndex, int toIndex, int val) Details
Assigns the specified int value to each element of the specified
range of the specified array of ints. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(short[] a, short val) Details
Assigns the specified short value to each element of the specified array
of shorts.
| ||||||||||||||||||||
| public static void | fill(short[] a, int fromIndex, int toIndex, short val) Details
Assigns the specified short value to each element of the specified
range of the specified array of shorts. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(char[] a, char val) Details
Assigns the specified char value to each element of the specified array
of chars.
| ||||||||||||||||||||
| public static void | fill(char[] a, int fromIndex, int toIndex, char val) Details
Assigns the specified char value to each element of the specified
range of the specified array of chars. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(byte[] a, byte val) Details
Assigns the specified byte value to each element of the specified array
of bytes.
| ||||||||||||||||||||
| public static void | fill(byte[] a, int fromIndex, int toIndex, byte val) Details
Assigns the specified byte value to each element of the specified
range of the specified array of bytes. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(boolean[] a, boolean val) Details
Assigns the specified boolean value to each element of the specified
array of booleans.
| ||||||||||||||||||||
| public static void | fill(boolean[] a, int fromIndex, int toIndex, boolean val) Details
Assigns the specified boolean value to each element of the specified
range of the specified array of booleans. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(double[] a, double val) Details
Assigns the specified double value to each element of the specified
array of doubles.
| ||||||||||||||||||||
| public static void | fill(double[] a, int fromIndex, int toIndex, double val) Details
Assigns the specified double value to each element of the specified
range of the specified array of doubles. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(float[] a, float val) Details
Assigns the specified float value to each element of the specified array
of floats.
| ||||||||||||||||||||
| public static void | fill(float[] a, int fromIndex, int toIndex, float val) Details
Assigns the specified float value to each element of the specified
range of the specified array of floats. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static void | fill(Object[] a, Object val) Details
Assigns the specified Object reference to each element of the specified
array of Objects.
| ||||||||||||||||||||
| public static void | fill(Object[] a, int fromIndex, int toIndex, Object val) Details
Assigns the specified Object reference to each element of the specified
range of the specified array of Objects. The range to be filled
extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be filled is empty.)
| ||||||||||||||||||||
| public static int | hashCode(long[] a) Details
Returns a hash code based on the contents of the specified array.
For any two long arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(int[] a) Details
Returns a hash code based on the contents of the specified array.
For any two non-null int arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(short[] a) Details
Returns a hash code based on the contents of the specified array.
For any two short arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(char[] a) Details
Returns a hash code based on the contents of the specified array.
For any two char arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(byte[] a) Details
Returns a hash code based on the contents of the specified array.
For any two byte arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(boolean[] a) Details
Returns a hash code based on the contents of the specified array.
For any two boolean arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(float[] a) Details
Returns a hash code based on the contents of the specified array.
For any two float arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(double[] a) Details
Returns a hash code based on the contents of the specified array.
For any two double arrays a and b
such that Arrays.equals(a, b), it is also the case that
Arrays.hashCode(a) == Arrays.hashCode(b).
The value returned by this method is the same value that would be
obtained by invoking the
| ||||||||||||||||||||
| public static int | hashCode(Object[] a) Details
Returns a hash code based on the contents of the specified array. If
the array contains other arrays as elements, the hash code is based on
their identities rather than their contents. It is therefore
acceptable to invoke this method on an array that contains itself as an
element, either directly or indirectly through one or more levels of
arrays.
For any two arrays a and b such that Arrays.equals(a, b), it is also the case that Arrays.hashCode(a) == Arrays.hashCode(b). The value returned by this method is equal to the value that would be returned by Arrays.asList(a).hashCode(), unless a is null, in which case 0 is returned.
| ||||||||||||||||||||
| public static void | sort(long[] a) Details
Sorts the specified array of longs into ascending numerical order.
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.
| ||||||||||||||||||||
| public static void | sort(long[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of longs into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.)
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.
| ||||||||||||||||||||
| public static void | sort(int[] a) Details
Sorts the specified array of ints into ascending numerical order.
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.
| ||||||||||||||||||||
| public static void | sort(int[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of ints into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.) 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.
| ||||||||||||||||||||
| public static void | sort(short[] a) Details
Sorts the specified array of shorts into ascending numerical order.
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.
| ||||||||||||||||||||
| public static void | sort(short[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of shorts into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.) 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.
| ||||||||||||||||||||
| public static void | sort(char[] a) Details
Sorts the specified array of chars into ascending numerical order.
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.
| ||||||||||||||||||||
| public static void | sort(char[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of chars into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.) 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.
| ||||||||||||||||||||
| public static void | sort(byte[] a) Details
Sorts the specified array of bytes into ascending numerical order.
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.
| ||||||||||||||||||||
| public static void | sort(byte[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of bytes into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.) 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.
| ||||||||||||||||||||
| public static void | sort(double[] a) Details
Sorts the specified array of doubles into ascending numerical order.
The 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.
| ||||||||||||||||||||
| public static void | sort(double[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of doubles into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.)
The 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.
| ||||||||||||||||||||
| public static void | sort(float[] a) Details
Sorts the specified array of floats into ascending numerical order.
The 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.
| ||||||||||||||||||||
| public static void | sort(float[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of floats into
ascending numerical order. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.)
The 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.
| ||||||||||||||||||||
| public static void | sort(Object[] a) Details
Sorts the specified array of objects into ascending order, according to
the natural ordering
of its elements. All elements in the array
must implement the Comparable interface. Furthermore, all
elements in the array must be mutually comparable (that is,
e1.compareTo(e2) must not throw a ClassCastException
for any elements e1 and e2 in the array).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.
| ||||||||||||||||||||
| public static void | sort(Object[] a, int fromIndex, int toIndex) Details
Sorts the specified range of the specified array of objects into
ascending order, according to the
natural ordering of its
elements. The range to be sorted extends from index
fromIndex, inclusive, to index toIndex, exclusive.
(If fromIndex==toIndex, the range to be sorted is empty.) All
elements in this range must implement the Comparable
interface. Furthermore, all elements in this range must be mutually
comparable (that is, e1.compareTo(e2) must not throw a
ClassCastException for any elements e1 and
e2 in the array).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.
| ||||||||||||||||||||
| public static void<T> | sort(Object[] a, Comparator c) Details
Sorts the specified array of objects according to the order induced by
the specified comparator. All elements in the array must be
mutually comparable by the specified comparator (that is,
c.compare(e1, e2) must not throw a ClassCastException
for any elements e1 and e2 in the array). 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.
| ||||||||||||||||||||
| public static void<T> | sort(Object[] a, int fromIndex, int toIndex, Comparator c) Details
Sorts the specified range of the specified array of objects according
to the order induced by the specified comparator. The range to be
sorted extends from index fromIndex, inclusive, to index
toIndex, exclusive. (If fromIndex==toIndex, the
range to be sorted is empty.) All elements in the range must be
mutually comparable by the specified comparator (that is,
c.compare(e1, e2) must not throw a ClassCastException
for any elements e1 and e2 in the range). 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.
| ||||||||||||||||||||
| public static String | toString(long[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(long). Returns "null" if a
is null.
| ||||||||||||||||||||
| public static String | toString(int[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(int). Returns "null" if a is
null.
| ||||||||||||||||||||
| public static String | toString(short[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(short). Returns "null" if a
is null.
| ||||||||||||||||||||
| public static String | toString(char[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(char). Returns "null" if a
is null.
| ||||||||||||||||||||
| public static String | toString(byte[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements
are separated by the characters ", " (a comma followed
by a space). Elements are converted to strings as by
String.valueOf(byte). Returns "null" if
a is null.
| ||||||||||||||||||||
| public static String | toString(boolean[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(boolean). Returns "null" if
a is null.
| ||||||||||||||||||||
| public static String | toString(float[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(float). Returns "null" if a
is null.
| ||||||||||||||||||||
| public static String | toString(double[] a) Details
Returns a string representation of the contents of the specified array.
The string representation consists of a list of the array's elements,
enclosed in square brackets ("[]"). Adjacent elements are
separated by the characters ", " (a comma followed by a
space). Elements are converted to strings as by
String.valueOf(double). Returns "null" if a
is null.
| ||||||||||||||||||||
| public static String | toString(Object[] a) Details
Returns a string representation of the contents of the specified array.
If the array contains other arrays as elements, they are converted to
strings by the Object#toString method inherited from
Object, which describes their identities rather than
their contents.
The value returned by this method is equal to the value that would be returned by Arrays.asList(a).toString(), unless a is null, in which case "null" is returned.
| ||||||||||||||||||||
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