Java – Arrays Class

October 25, 2019 howtojava Java Util 0

Java Arrays Class methods, constructors, variables available in Java 8 release are listed below. We will publish example program on each methods ASAP.

Methods in Java Arrays Class

S.No	Method & Description
1	`static <T> List<T> asList(T... a)` Returns a fixed-size list backed by the specified array.
2	`static int binarySearch(byte[] a, byte key)` Searches the specified array of bytes for the specified value using the binary search algorithm.
3	`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.
4	`static int binarySearch(char[] a, char key)` Searches the specified array of chars for the specified value using the binary search algorithm.
5	`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.
6	`static int binarySearch(double[] a, double key)` Searches the specified array of doubles for the specified value using the binary search algorithm.
7	`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.
8	`static int binarySearch(float[] a, float key)` Searches the specified array of floats for the specified value using the binary search algorithm.
9	`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.
10	`static int binarySearch(int[] a, int key)` Searches the specified array of ints for the specified value using the binary search algorithm.
11	`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.
12	`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.
13	`static int binarySearch(long[] a, long key)` Searches the specified array of longs for the specified value using the binary search algorithm.
14	`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.
15	`static int binarySearch(Object[] a, Object key)` Searches the specified array for the specified object using the binary search algorithm.
16	`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.
17	`static int binarySearch(short[] a, short key)` Searches the specified array of shorts for the specified value using the binary search algorithm.
18	`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.
19	`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.
20	`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.
21	`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.
22	`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.
23	`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.
24	`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.
25	`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.
26	`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.
27	`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.
28	`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.
29	`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.
30	`static boolean[] copyOfRange(boolean[] original, int from, int to)` Copies the specified range of the specified array into a new array.
31	`static byte[] copyOfRange(byte[] original, int from, int to)` Copies the specified range of the specified array into a new array.
32	`static char[] copyOfRange(char[] original, int from, int to)` Copies the specified range of the specified array into a new array.
33	`static double[] copyOfRange(double[] original, int from, int to)` Copies the specified range of the specified array into a new array.
34	`static float[] copyOfRange(float[] original, int from, int to)` Copies the specified range of the specified array into a new array.
35	`static int[] copyOfRange(int[] original, int from, int to)` Copies the specified range of the specified array into a new array.
36	`static long[] copyOfRange(long[] original, int from, int to)` Copies the specified range of the specified array into a new array.
37	`static short[] copyOfRange(short[] original, int from, int to)` Copies the specified range of the specified array into a new array.
38	`static <T> T[] copyOfRange(T[] original, int from, int to)` Copies the specified range of the specified array into a new array.
39	`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.
40	`static boolean deepEquals(Object[] a1, Object[] a2)` Returns true if the two specified arrays are deeply equal to one another.
41	`static int deepHashCode(Object[] a)` Returns a hash code based on the "deep contents" of the specified array.
42	`static String deepToString(Object[] a)` Returns a string representation of the "deep contents" of the specified array.
43	`static boolean equals(boolean[] a, boolean[] a2)` Returns true if the two specified arrays of booleans are equal to one another.
44	`static boolean equals(byte[] a, byte[] a2)` Returns true if the two specified arrays of bytes are equal to one another.
45	`static boolean equals(char[] a, char[] a2)` Returns true if the two specified arrays of chars are equal to one another.
46	`static boolean equals(double[] a, double[] a2)` Returns true if the two specified arrays of doubles are equal to one another.
47	`static boolean equals(float[] a, float[] a2)` Returns true if the two specified arrays of floats are equal to one another.
48	`static boolean equals(int[] a, int[] a2)` Returns true if the two specified arrays of ints are equal to one another.
49	`static boolean equals(long[] a, long[] a2)` Returns true if the two specified arrays of longs are equal to one another.
50	`static boolean equals(Object[] a, Object[] a2)` Returns true if the two specified arrays of Objects are equal to one another.
51	`static boolean equals(short[] a, short[] a2)` Returns true if the two specified arrays of shorts are equal to one another.
52	`static void fill(boolean[] a, boolean val)` Assigns the specified boolean value to each element of the specified array of booleans.
53	`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.
54	`static void fill(byte[] a, byte val)` Assigns the specified byte value to each element of the specified array of bytes.
55	`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.
56	`static void fill(char[] a, char val)` Assigns the specified char value to each element of the specified array of chars.
57	`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.
58	`static void fill(double[] a, double val)` Assigns the specified double value to each element of the specified array of doubles.
59	`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.
60	`static void fill(float[] a, float val)` Assigns the specified float value to each element of the specified array of floats.
61	`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.
62	`static void fill(int[] a, int val)` Assigns the specified int value to each element of the specified array of ints.
63	`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.
64	`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.
65	`static void fill(long[] a, long val)` Assigns the specified long value to each element of the specified array of longs.
66	`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.
67	`static void fill(Object[] a, Object val)` Assigns the specified Object reference to each element of the specified array of Objects.
68	`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.
69	`static void fill(short[] a, short val)` Assigns the specified short value to each element of the specified array of shorts.
70	`static int hashCode(boolean[] a)` Returns a hash code based on the contents of the specified array.
71	`static int hashCode(byte[] a)` Returns a hash code based on the contents of the specified array.
72	`static int hashCode(char[] a)` Returns a hash code based on the contents of the specified array.
73	`static int hashCode(double[] a)` Returns a hash code based on the contents of the specified array.
74	`static int hashCode(float[] a)` Returns a hash code based on the contents of the specified array.
75	`static int hashCode(int[] a)` Returns a hash code based on the contents of the specified array.
76	`static int hashCode(long[] a)` Returns a hash code based on the contents of the specified array.
77	`static int hashCode(Object[] a)` Returns a hash code based on the contents of the specified array.
78	`static int hashCode(short[] a)` Returns a hash code based on the contents of the specified array.
79	`static void parallelPrefix(double[] array, DoubleBinaryOperator op)` Cumulates, in parallel, each element of the given array in place, using the supplied function.
80	`static void parallelPrefix(double[] array, int fromIndex, int toIndex, DoubleBinaryOperator op)` Performs parallelPrefix(double[], DoubleBinaryOperator) for the given subrange of the array.
81	`static void parallelPrefix(int[] array, IntBinaryOperator op)` Cumulates, in parallel, each element of the given array in place, using the supplied function.
82	`static void parallelPrefix(int[] array, int fromIndex, int toIndex, IntBinaryOperator op)` Performs parallelPrefix(int[], IntBinaryOperator) for the given subrange of the array.
83	`static void parallelPrefix(long[] array, int fromIndex, int toIndex, LongBinaryOperator op)` Performs parallelPrefix(long[], LongBinaryOperator) for the given subrange of the array.
84	`static void parallelPrefix(long[] array, LongBinaryOperator op)` Cumulates, in parallel, each element of the given array in place, using the supplied function.
85	`static <T> void parallelPrefix(T[] array, BinaryOperator<T> op)` Cumulates, in parallel, each element of the given array in place, using the supplied function.
86	`static <T> void parallelPrefix(T[] array, int fromIndex, int toIndex, BinaryOperator<T> op)` Performs parallelPrefix(Object[], BinaryOperator) for the given subrange of the array.
87	`static void parallelSetAll(double[] array, IntToDoubleFunction generator)` Set all elements of the specified array, in parallel, using the provided generator function to compute each element.
88	`static void parallelSetAll(int[] array, IntUnaryOperator generator)` Set all elements of the specified array, in parallel, using the provided generator function to compute each element.
89	`static void parallelSetAll(long[] array, IntToLongFunction generator)` Set all elements of the specified array, in parallel, using the provided generator function to compute each element.
90	`static <T> void parallelSetAll(T[] array, IntFunction<? extends T> generator)` Set all elements of the specified array, in parallel, using the provided generator function to compute each element.
91	`static void parallelSort(byte[] a)` Sorts the specified array into ascending numerical order.
92	`static void parallelSort(byte[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
93	`static void parallelSort(char[] a)` Sorts the specified array into ascending numerical order.
94	`static void parallelSort(char[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
95	`static void parallelSort(double[] a)` Sorts the specified array into ascending numerical order.
96	`static void parallelSort(double[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
97	`static void parallelSort(float[] a)` Sorts the specified array into ascending numerical order.
98	`static void parallelSort(float[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
99	`static void parallelSort(int[] a)` Sorts the specified array into ascending numerical order.
100	`static void parallelSort(int[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
101	`static void parallelSort(long[] a)` Sorts the specified array into ascending numerical order.
102	`static void parallelSort(long[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
103	`static void parallelSort(short[] a)` Sorts the specified array into ascending numerical order.
104	`static void parallelSort(short[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending numerical order.
105	`static <T extends Comparable<? super T>> void parallelSort(T[] a)` Sorts the specified array of objects into ascending order, according to the natural ordering of its elements.
106	`static <T> void parallelSort(T[] a, Comparator<? super T> cmp)` Sorts the specified array of objects according to the order induced by the specified comparator.
107	`static <T extends Comparable<? super T>> void parallelSort(T[] 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.
108	`static <T> void parallelSort(T[] a, int fromIndex, int toIndex, Comparator<? super T> cmp)` Sorts the specified range of the specified array of objects according to the order induced by the specified comparator.
109	`static void setAll(double[] array, IntToDoubleFunction generator)` Set all elements of the specified array, using the provided generator function to compute each element.
110	`static void setAll(int[] array, IntUnaryOperator generator)` Set all elements of the specified array, using the provided generator function to compute each element.
111	`static void setAll(long[] array, IntToLongFunction generator)` Set all elements of the specified array, using the provided generator function to compute each element.
112	`static <T> void setAll(T[] array, IntFunction<? extends T> generator)` Set all elements of the specified array, using the provided generator function to compute each element.
113	`static void sort(byte[] a)` Sorts the specified array into ascending numerical order.
114	`static void sort(byte[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
115	`static void sort(char[] a)` Sorts the specified array into ascending numerical order.
116	`static void sort(char[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
117	`static void sort(double[] a)` Sorts the specified array into ascending numerical order.
118	`static void sort(double[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
119	`static void sort(float[] a)` Sorts the specified array into ascending numerical order.
120	`static void sort(float[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
121	`static void sort(int[] a)` Sorts the specified array into ascending numerical order.
122	`static void sort(int[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
123	`static void sort(long[] a)` Sorts the specified array into ascending numerical order.
124	`static void sort(long[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
125	`static void sort(Object[] a)` Sorts the specified array of objects into ascending order, according to the natural ordering of its elements.
126	`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.
127	`static void sort(short[] a)` Sorts the specified array into ascending numerical order.
128	`static void sort(short[] a, int fromIndex, int toIndex)` Sorts the specified range of the array into ascending order.
129	`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.
130	`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.
131	`static Spliterator.OfDouble spliterator(double[] array)` Returns a Spliterator.OfDouble covering all of the specified array.
132	`static Spliterator.OfDouble spliterator(double[] array, int startInclusive, int endExclusive)` Returns a Spliterator.OfDouble covering the specified range of the specified array.
133	`static Spliterator.OfInt spliterator(int[] array)` Returns a Spliterator.OfInt covering all of the specified array.
134	`static Spliterator.OfInt spliterator(int[] array, int startInclusive, int endExclusive)` Returns a Spliterator.OfInt covering the specified range of the specified array.
135	`static Spliterator.OfLong spliterator(long[] array)` Returns a Spliterator.OfLong covering all of the specified array.
136	`static Spliterator.OfLong spliterator(long[] array, int startInclusive, int endExclusive)` Returns a Spliterator.OfLong covering the specified range of the specified array.
137	`static <T> Spliterator<T> spliterator(T[] array)` Returns a Spliterator covering all of the specified array.
138	`static <T> Spliterator<T> spliterator(T[] array, int startInclusive, int endExclusive)` Returns a Spliterator covering the specified range of the specified array.
139	`static DoubleStream stream(double[] array)` Returns a sequential DoubleStream with the specified array as its source.
140	`static DoubleStream stream(double[] array, int startInclusive, int endExclusive)` Returns a sequential DoubleStream with the specified range of the specified array as its source.
141	`static IntStream stream(int[] array)` Returns a sequential IntStream with the specified array as its source.
142	`static IntStream stream(int[] array, int startInclusive, int endExclusive)` Returns a sequential IntStream with the specified range of the specified array as its source.
143	`static LongStream stream(long[] array)` Returns a sequential LongStream with the specified array as its source.
144	`static LongStream stream(long[] array, int startInclusive, int endExclusive)` Returns a sequential LongStream with the specified range of the specified array as its source.
145	`static <T> Stream<T> stream(T[] array)` Returns a sequential Stream with the specified array as its source.
146	`static <T> Stream<T> stream(T[] array, int startInclusive, int endExclusive)` Returns a sequential Stream with the specified range of the specified array as its source.
147	`static String toString(boolean[] a)` Returns a string representation of the contents of the specified array.
148	`static String toString(byte[] a)` Returns a string representation of the contents of the specified array.
149	`static String toString(char[] a)` Returns a string representation of the contents of the specified array.
150	`static String toString(double[] a)` Returns a string representation of the contents of the specified array.
151	`static String toString(float[] a)` Returns a string representation of the contents of the specified array.
152	`static String toString(int[] a)` Returns a string representation of the contents of the specified array.
153	`static String toString(long[] a)` Returns a string representation of the contents of the specified array.
154	`static String toString(Object[] a)` Returns a string representation of the contents of the specified array.
155	`static String toString(short[] a)` Returns a string representation of the contents of the specified array.

Ask your questions in eHowToNow Forum

Post your technical, non-technical doubts, questions in our site. Get answer as soon as possible, meanwhile you can help others by answering, unanswered questions.
To Ask new Question : Ask Question
Check our existing discussions : Questions & Answers

Leave a Reply Cancel reply

You must be logged in to post a comment.

Copyright © 2021 | WordPress Theme by MH Themes