public class ArrayUtil
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
static boolean[] |
EMPTY_BOOLEAN_ARRAY |
static byte[] |
EMPTY_BYTE_ARRAY |
static double[] |
EMPTY_DOUBLE_ARRAY |
static float[] |
EMPTY_FLOAT_ARRAY |
static int[] |
EMPTY_INT_ARRAY |
static long[] |
EMPTY_LONG_ARRAY |
static short[] |
EMPTY_SHORT_ARRAY |
Modifier and Type | Method and Description |
---|---|
static <T> T[] |
add(T[] array,
T element)
Copies the given array and adds the given element at the end of the new array.
|
static int[] |
toIntArray(java.util.List<java.lang.Integer> ints) |
static java.util.List<java.lang.Integer> |
toIntList(int[] ints) |
static long[] |
toLongArray(java.util.List<java.lang.Long> longs) |
static java.util.List<java.lang.Long> |
toLongList(long[] longs) |
static boolean[] |
toPrimitive(java.lang.Boolean[] array)
Converts an array of object Booleans to primitives.
|
static byte[] |
toPrimitive(java.lang.Byte[] array)
Converts an array of object Bytes to primitives.
|
static double[] |
toPrimitive(java.lang.Double[] array)
Converts an array of object Doubles to primitives.
|
static float[] |
toPrimitive(java.lang.Float[] array)
Converts an array of object Floats to primitives.
|
static int[] |
toPrimitive(java.lang.Integer[] array)
Converts an array of object Integers to primitives.
|
static long[] |
toPrimitive(java.lang.Long[] array)
Converts an array of object Longs to primitives.
|
static short[] |
toPrimitive(java.lang.Short[] array)
Converts an array of object Shorts to primitives.
|
public static final boolean[] EMPTY_BOOLEAN_ARRAY
public static final byte[] EMPTY_BYTE_ARRAY
public static final short[] EMPTY_SHORT_ARRAY
public static final int[] EMPTY_INT_ARRAY
public static final long[] EMPTY_LONG_ARRAY
public static final float[] EMPTY_FLOAT_ARRAY
public static final double[] EMPTY_DOUBLE_ARRAY
public static java.util.List<java.lang.Integer> toIntList(int[] ints)
public static int[] toIntArray(java.util.List<java.lang.Integer> ints)
public static java.util.List<java.lang.Long> toLongList(long[] longs)
public static long[] toLongArray(java.util.List<java.lang.Long> longs)
public static boolean[] toPrimitive(java.lang.Boolean[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Boolean
array, may be null
boolean
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static byte[] toPrimitive(java.lang.Byte[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Byte
array, may be null
byte
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static short[] toPrimitive(java.lang.Short[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Short
array, may be null
byte
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static int[] toPrimitive(java.lang.Integer[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Integer
array, may be null
int
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static long[] toPrimitive(java.lang.Long[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Long
array, may be null
long
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static float[] toPrimitive(java.lang.Float[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Float
array, may be null
float
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static double[] toPrimitive(java.lang.Double[] array)
This method returns null
for a null
input array.
This code is borrowed from `org.apache.commons:commons-lang3`.
array
- a Double
array, may be null
double
array, null
if null array inputjava.lang.NullPointerException
- if array content is null
public static <T> T[] add(T[] array, T element)
The new array contains the same elements of the input array plus the given element in the last position. The component type of the new array is the same as that of the input array.
If the input array is null
, a new one element array is returned whose component type
is the same as the element, unless the element itself is null, in which case the return type is
Object[]
ArrayUtils.add(null, null) = IllegalArgumentException ArrayUtils.add(null, "a") = ["a"] ArrayUtils.add(["a"], null) = ["a", null] ArrayUtils.add(["a"], "b") = ["a", "b"] ArrayUtils.add(["a", "b"], "c") = ["a", "b", "c"]This code is borrowed from `org.apache.commons:commons-lang3`.
T
- the component type of the arrayarray
- the array to "add" the element to, may be null
element
- the object to add, may be null
java.lang.IllegalArgumentException
- if both arguments are null