Arrays
This class contains methods for manipulating arrays.
Convert array to List
tatic<T> List<T> asList(T... a)- Returns a fixed-size list backed by the specified array.
Binary search an 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(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(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(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<T> 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<T> int binarySearch(T[] a, T key, Comparator<? super T> c)- Searches the specified array for the specified object using the binary search algorithm.
Copy value to an Array
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> 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,U> 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> T[] copyOfRange(T[] original, int from, int to)- Copies the specified range of the specified array into a new array.
static<T,U> T[] copyOfRange(U[] original, int from, int to, Class<? extends T[]> newType)- Copies the specified range of the specified array into a new array.
Deep hash code,to string, equals
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.
Compare two arrays
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(long[] a, long[] a2)- Returns true if the two specified arrays of longs 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(short[] a, short[] a2)- Returns true if the two specified arrays of shorts are equal to one another.
Fill value to array
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(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(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(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.
Get the hash code for array
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(long[] 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(short[] a)- Returns a hash code based on the contents of the specified array.
Sort an 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(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(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(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<T> void sort(T[] a, Comparator<? super T> c)- Sorts the specified array of objects according to the order induced by the specified comparator.
static<T> 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.
Convert array to string
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(long[] 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(short[] a)- Returns a string representation of the contents of the specified array.
Revised from Open JDK source code