The Java Arrays class contains a static factory that allows arrays to be viewed as lists. Following are the important points about Arrays −
Sr.No.
Method & Description
1
static <T> List<T> asList(T... a)
This method returns a fixed-size list backed by the specified array.
2
static int binarySearch(byte[] a, byte key)
This method searches the specified array of bytes for the specified value using the binary search algorithm.
3
static int binarySearch(char[] a, char key)
This method searches the specified array of chars for the specified value using the binary search algorithm.
4
static int binarySearch(double[] a, double key)
This method searches the specified array of doubles for the specified value using the binary search algorithm.
5
static int binarySearch(float[] a, float key)
This method searches the specified array of floats for the specified value using the binary search algorithm.
6
static int binarySearch(int[] a, int key)
This method searches the specified array of ints for the specified value using the binary search algorithm.
7
static int binarySearch(long[] a, int fromIndex, int toIndex, long key)
This method searches a range of the specified array of longs for the specified value using the binary search algorithm.
8
static int binarySearch(Object[] a, Object key)
This method searches the specified array for the specified object using the binary search algorithm.
9
static int binarySearch(short[] a, short key)
This method searches the specified array of shorts for the specified value using the binary search algorithm.
10
static <T> int binarySearch(T[] a, T key, Comparator<? super T> c)
This method searches the specified array for the specified object using the binary search algorithm.
11
static int compare(boolean[] a, boolean[] b)
This method compares two boolean arrays lexicographically.
12
static int compare(byte[] a, byte[] b)
This method compares two byte arrays lexicographically.
13
static int compare(char[] a, char[] b)
This method compares two char arrays lexicographically.
14
static int compare(double[] a, double[] b)
This method compares two double arrays lexicographically.
15
static int compare(float[] a, float[] b)
This method compares two float arrays lexicographically.
16
static int compare(int[] a, int[] b)
This method compares two int arrays lexicographically.
17
static int compare(long[] a, long[] b)
This method compares two long arrays lexicographically.
18
static int compare(short[] a, short[] b)
This method compares two short arrays lexicographically.
19
compareUnsigned(byte[] a, byte[] b)
This method compares two byte arrays lexicographically, numerically treating elements as unsigned.
20
compareUnsigned(int[] a, int[] b)
This method compares two int arrays lexicographically, numerically treating elements as unsigned.
21
compareUnsigned(long[] a, long[] b)
This method compares two long arrays lexicographically, numerically treating elements as unsigned.
22
compareUnsigned(short[] a, short[] b)
This method compares two short arrays lexicographically, numerically treating elements as unsigned.
23
static boolean[] copyOf(boolean[] original, int newLength)
This method copies the specified array, truncating or padding with false (if necessary) so the copy has the specified length.
24
static byte[] copyOf(byte[] original, int newLength)
This method copies the specified array, truncating or padding with false (if necessary) so the copy has the specified length.
25
static char[] copyOf(char[] original, int newLength)
This method copies the specified array, truncating or padding with false (if necessary) so the copy has the specified length.
26
static double[] copyOf(double[] original, int newLength)
This method copies the specified array, truncating or padding with false (if necessary) so the copy has the specified length.
27
static float[] copyOf(float[] original, int newLength)
This method copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.
28
static int[] copyOf(int[] original, int newLength)
This method copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.
29
static long[] copyOf(long[] original, int newLength)
This method copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.
30
static short[] copyOf(short[] original, int newLength)
This method copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.
31
static <T> T[] copyOf(T[] original, int newLength)
This method copies the specified array, truncating or padding with nulls (if necessary) so the copy has the specified length.
32
static <T, U> T[] copyOf(U[] original, int newLength,Class<? extends T[]> newType)
This method copies the specified array, truncating or padding with nulls (if necessary) so the copy has the specified length.
33
static boolean[] copyOfRange(boolean[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
34
static byte[] copyOfRange(byte[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
35
static char[] copyOfRange(char[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
36
static double[] copyOfRange(double[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
37
static int[] copyOfRange(int[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
38
static long[] copyOfRange(long[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
39
static short[] copyOfRange(short[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
40
static <T> T[] copyOfRange(T[] original, int from, int to)
This method copies the specified range of the specified array into a new array.
41
static <T,U> T[] copyOfRange(U[] original, int from, int to, Class<? extends T[]> newType)
This method copies the specified range of the specified array into a new array.
42
static boolean deepEquals(Object[] a1, Object[] a2)
This method returns true if the two specified arrays are deeply equal to one another.
43
static int deepHashCode(Object[] a)
This method returns a hash code based on the "deep contents" of the specified array.
44
static String deepToString(Object[] a)
This method returns a string representation of the "deep contents" of the specified array.
45
static boolean equals(boolean[] a, boolean[] a2)
This method returns true if the two specified arrays of booleans are equal to one another.
46
static boolean equals(byte[] a, byte[] a2)
This method returns true if the two specified arrays of bytes are equal to one another.
47
static boolean equals(char[] a, char[] a2)
This method returns true if the two specified arrays of chars are equal to one another.
48
static boolean equals(double[] a, double[] a2)
This method returns true if the two specified arrays of double are equal to one another.
49
static boolean equals(float[] a, float[] a2)
This method returns true if the two specified arrays of floats are equal to one another.
50
static boolean equals(int[] a, int[] a2)
This method returns true if the two specified arrays of ints are equal to one another.
51
static boolean equals(long[] a, long[] a2)
This method returns true if the two specified arrays of longs are equal to one another.
52
static boolean equals(short[] a, short[] a2)
This method returns true if the two specified arrays of shorts are equal to one another.
53
static boolean equals(Object[] a, Object[] a2)
This method returns true if the two specified arrays of Objects are equal to one another.
54
static boolean equals(T[] a, T[] a2, Comparator<? super T> cmp)
This method returns true if the two specified arrays of Objects are equal to one another.
55
static void fill(boolean[] a, boolean val)
This method assigns the specified boolean value to each element of the specified array of booleans.
56
static void fill(byte[] a, byte val)
This method assigns the specified byte value to each element of the specified array of bytes.
57
static void fill(char[] a, char val)
This method assigns the specified char value to each element of the specified array of chars.
58
static void fill(double[] a, double val)
This method assigns the specified double value to each element of the specified array of doubles.
59
static void fill(float[] a, float val)
This method assigns the specified float value to each element of the specified array of floats.
60
static void fill(int[] a, int val)
This method assigns the specified int value to each element of the specified array of ints.
61
static void fill(long[] a, long val)
This method assigns the specified long value to each element of the specified array of longs.
62
static void fill(Object[] a, Object val)
This method assigns the specified Object reference to each element of the specified array of Objects.
63
static void fill(short[] a, short val)
This method assigns the specified short value to each element of the specified array of shorts.
64
static int hashCode(boolean[] a)
This method returns a hash code based on the contents of the specified array.
65
static int mismatch(boolean[] a, boolean[] b)
This method finds and returns the index of the first mismatch between two boolean arrays, otherwise return -1 if no mismatch is found.
66
static int mismatch(byte[] a, byte[] b)
This method finds and returns the index of the first mismatch between two byte arrays, otherwise return -1 if no mismatch is found.
67
static int mismatch(char[] a, char[] b)
This method finds and returns the index of the first mismatch between two char arrays, otherwise return -1 if no mismatch is found.
68
static int mismatch(double[] a, double[] b)
This method finds and returns the index of the first mismatch between two double arrays, otherwise return -1 if no mismatch is found.
69
static int mismatch(int[] a, int[] b)
This method finds and returns the index of the first mismatch between two int arrays, otherwise return -1 if no mismatch is found.
70
static int mismatch(long[] a, long[] b)
This method finds and returns the index of the first mismatch between two long arrays, otherwise return -1 if no mismatch is found.
71
static int mismatch(short[] a, short[] b)
This method finds and returns the index of the first mismatch between two short arrays, otherwise return -1 if no mismatch is found.
72
static int mismatch(Object[] a, Object[] b)
This method finds and returns the index of the first mismatch between two object arrays, otherwise return -1 if no mismatch is found.
73
static int mismatch(T[] a, T[] b, Comparator<? super T> cmp)
This method finds and returns the index of the first mismatch between two object arrays, otherwise return -1 if no mismatch is found.
74
static void parallelPrefix(double[] array, DoubleBinaryOperator op)
This method cumulates, in parallel, each element of the given array in place, using the supplied function.
75
static void parallelPrefix(int[] array, IntBinaryOperator op)
This method cumulates, in parallel, each element of the given array in place, using the supplied function.
76
static void parallelPrefix(long[] array, LongBinaryOperator op)
This method cumulates, in parallel, each element of the given array in place, using the supplied function.
77
static <T> void parallelPrefix(T[] array, BinaryOperator<T> op)
This method cumulates, in parallel, each element of the given array in place, using the supplied function.
78
static void parallelSetAll(double[] array, IntToDoubleFunction generator)
This method sets all elements of the specified array, in parallel, using the provided generator function to compute each element.
79
static void parallelSetAll(int[] array, IntUnaryOperator generator)
This method sets all elements of the specified array, in parallel, using the provided generator function to compute each element.
80
static void parallelSetAll(long[] array, IntToLongFunction generator)
This method sets all elements of the specified array, in parallel, using the provided generator function to compute each element.
81
static <T> void parallelSetAll(T[] array, IntFunction<? extends T> generator)
This method sets all elements of the specified array, in parallel, using the provided generator function to compute each element.
82
static void parallelSort(byte[] a)
This method sorts the specified array of bytes into ascending numerical order.
83
static void parallelSort(char[] a)
This method sorts the specified array of chars into ascending numerical order.
84
static void parallelSort(double[] a)
This method sorts the specified array of doubles into ascending numerical order.
85
static void parallelSort(float[] a)
This method sorts the specified array of floats into ascending numerical order.
86
static void parallelSort(int[] a)
This method sorts the specified array of ints into ascending numerical order.
87
static void parallelSort(long[] a)
This method sorts the specified array of longs into ascending numerical order.
88
static void parallelSort(short[] a)
This method sorts the specified array of shorts into ascending numerical order.
89
static <T extends Comparable<? super T>> void parallelSort(T[] a)
This method sorts the specified array of objects into ascending order, according to the natural ordering of its elements.
90
static <T>> void parallelSort(T[] a, Comparator<? super T> cmp)
This method sorts the specified array of objects into ascending order, according to the ordering provided by the Comparator instance.
91
static void setAll(double[] array, IntToDoubleFunction generator)
This method sets all elements of the specified array, using the provided generator function to compute each element.
92
static void setAll(int[] array, IntUnaryOperator generator)
This method sets all elements of the specified array, using the provided generator function to compute each element.
93
static void setAll(long[] array, IntToLongFunction generator)
This method sets all elements of the specified array, using the provided generator function to compute each element.
94
static <T> void setAll(T[] array, IntFunction<? extends T> generator)
This method sets all elements of the specified array, using the provided generator function to compute each element.
95
static Spliterator.OfDouble spliterator(double[] array)
This method returns a Spliterator.OfDouble covering all of the specified array.
96
static Spliterator.OfInt spliterator(int[] array)
This method returns a Spliterator.OfInt covering all of the specified array.
97
static Spliterator.OfLong spliterator(long[] array)
This method returns a Spliterator.OfLong covering all of the specified array.
98
static <T> Spliterator<T> spliterator(T[] array)
This method returns a Spliterator covering all of the specified array.
99
static DoubleStream stream(double[] array)
This method returns a sequential DoubleStream with the specified array as its source.
100
static IntStream stream(int[] array)
This method returns a sequential IntStream with the specified array as its source.
101
static LongStream stream(long[] array)
This method returns a sequential LongStream with the specified array as its source.
102
static <T> Stream<T> stream(T[] array)
This method returns a sequential Stream with the specified array as its source.
103
This method sorts the specified array of bytes into ascending numerical order.
104
This method sorts the specified array of chars into ascending numerical order.
105
This method sorts the specified array of doubles into ascending numerical order.
106
This method sorts the specified array of floats into ascending numerical order.
107
This method sorts the specified array of ints into ascending numerical order.
108
This method sorts the specified array of longs into ascending numerical order.
109
This method sorts the specified array of objects into ascending order, according to the natural ordering of its elements.
110
This method sorts the specified array of shorts into ascending numerical order.
111
static String toString(boolean[] a)
This method returns a string representation of the contents of the specified array of boolean.
Let us compile and run the above program, this will produce the following result −
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