cn.featherfly.common.lang

Class ArrayUtils

java.lang.Object

cn.featherfly.common.lang.ArrayUtils

public final class ArrayUtils
extends java.lang.Object

数组的工具类.

Since:

1.0

Field Summary

Fields

Modifier and Type	Field and Description
static boolean[]	EMPTY_BOOLEAN_ARRAY An empty immutable boolean array.
static java.lang.Boolean[]	EMPTY_BOOLEAN_OBJECT_ARRAY An empty immutable Boolean array.
static byte[]	EMPTY_BYTE_ARRAY An empty immutable byte array.
static java.lang.Byte[]	EMPTY_BYTE_OBJECT_ARRAY An empty immutable Byte array.
static char[]	EMPTY_CHAR_ARRAY An empty immutable char array.
static java.lang.Character[]	EMPTY_CHARACTER_OBJECT_ARRAY An empty immutable Character array.
static java.lang.Class<?>[]	EMPTY_CLASS_ARRAY An empty immutable Class array.
static double[]	EMPTY_DOUBLE_ARRAY An empty immutable double array.
static java.lang.Double[]	EMPTY_DOUBLE_OBJECT_ARRAY An empty immutable Double array.
static float[]	EMPTY_FLOAT_ARRAY An empty immutable float array.
static java.lang.Float[]	EMPTY_FLOAT_OBJECT_ARRAY An empty immutable Float array.
static int[]	EMPTY_INT_ARRAY An empty immutable int array.
static java.lang.Integer[]	EMPTY_INTEGER_OBJECT_ARRAY An empty immutable Integer array.
static long[]	EMPTY_LONG_ARRAY An empty immutable long array.
static java.lang.Long[]	EMPTY_LONG_OBJECT_ARRAY An empty immutable Long array.
static java.lang.Object[]	EMPTY_OBJECT_ARRAY An empty immutable Object array.
static short[]	EMPTY_SHORT_ARRAY An empty immutable short array.
static java.lang.Short[]	EMPTY_SHORT_OBJECT_ARRAY An empty immutable Short array.
static java.lang.String[]	EMPTY_STRING_ARRAY An empty immutable String array.

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	concat(java.lang.Object arr1, java.lang.Object arr2) 数组链接 .
static boolean	contain(java.lang.String[] strSet, java.lang.String strTarget, boolean ignoreCase) 判断第一个传入的字符串数组中是否存在第二个传入的字符串.
static <T> boolean	contain(T[] tSet, T target) 判断第一个传入的数组中是否存在第二个参数 .
static boolean	containString(java.lang.String[] strSet, java.lang.String strTarget, boolean ignoreCase) Deprecated. use contain(String[], String, boolean) instead
static <T> T[]	create(java.lang.Class<T> type, int length) 创建数组 .
static <T> T[]	create(java.lang.Class<T> type, int length, java.util.function.IntFunction<T> filler) create array and fill the array with given filler.
static <T> T[]	createFill(java.lang.Class<T> type, int length, T element) create array and fill the array with given argu.
static void	each(java.lang.Object array, java.util.function.ObjIntConsumer<java.lang.Object> consumer) Each.
static <T> void	each(java.util.function.ObjIntConsumer<T> consumer, T... array) Each.
static <T> void	fill(T[] target, T[] source) fill target array with source array .
static void	fillAll(byte[] target, byte[] source) fillAll.
static void	fillAll(byte[] target, int startIndex, byte[] source) 使用source从startIndex填充target.
static void	fillAll(char[] target, char[] source) fillAll.
static void	fillAll(char[] target, int startIndex, char[] source) 使用source从startIndex填充target.
static void	fillAll(double[] target, double[] source) fillAll.
static void	fillAll(double[] target, int startIndex, double[] source) 使用source从startIndex填充target.
static void	fillAll(int[] target, int[] source) fillAll.
static void	fillAll(int[] target, int startIndex, int[] source) 使用source从startIndex填充target.
static void	fillAll(long[] target, int startIndex, long[] source) 使用source从startIndex填充target.
static void	fillAll(long[] target, long[] source) fillAll.
static <T> void	fillAll(T[] target, int startIndex, T[] source) 使用source从startIndex填充target.
static <T> void	fillAll(T[] target, T[] source) fillAll.
static boolean	isArray(java.lang.Object array) 返回传入对象是否是数组.
static boolean	isEmpty(java.lang.Object array) 返回传入数组是否为空（是null或size=0）.
static boolean	isNotEmpty(java.lang.Object array) 返回传入数组是否不为空（是null或size=0）.
static <T> T	newInstance(java.lang.Class<?> type, int length) 创建数组 .
static void	set(java.lang.Object array, int index, boolean value) sets value for array at index.
static void	set(java.lang.Object array, int index, byte value) sets value for array at index.
static void	set(java.lang.Object array, int index, char value) sets value for array at index.
static void	set(java.lang.Object array, int index, double value) sets value for array at index.
static void	set(java.lang.Object array, int index, float value) sets value for array at index.
static void	set(java.lang.Object array, int index, int value) sets value for array at index.
static void	set(java.lang.Object array, int index, long value) sets value for array at index.
static void	set(java.lang.Object array, int index, java.lang.Object value) sets value for array at index.
static void	set(java.lang.Object array, int index, short value) sets value for array at index.
static <T> java.util.List<T>	toList(T... arrays) To list.
static <A> java.util.Map<java.lang.Integer,A>	toMap(A... arrays) 转换为以数组索引为key,数组值为value的map.
static <A> java.util.Map<java.lang.String,A>	toMap2(A... arrays) Deprecated. use toMapStringKey(Object...) instead
static <A> java.util.Map<java.lang.String,A>	toMapStringKey(A... arrays) 转换为以数组索引为key(string类型),数组值为value的map.
static <A extends java.lang.Number> A[]	toNumbers(java.lang.Class<A> type, java.lang.String... array) To number array.
static <T> java.util.Set<T>	toSet(T... arrays) To set.
static <A> java.lang.String	toString(A[] array, char linkSymbol) 将传入数组进行字符串转换,使用传入的符号作为数组之间的连接符号.
static <E> java.lang.String	toString(E... objects) 将传入数组进行字符串转换（与Collection的一样使用,分割）
static java.lang.String	toString(java.lang.Object array) 将传入数组进行字符串转换（与Collection的一样使用,分割）
static boolean[]	unpack(java.lang.Boolean... array) Unpack.
static byte[]	unpack(java.lang.Byte... array) Unpack.
static char[]	unpack(java.lang.Character... array) Unpack.
static double[]	unpack(java.lang.Double... array) Unpack.
static float[]	unpack(java.lang.Float... array) Unpack.
static int[]	unpack(java.lang.Integer... array) Unpack.
static long[]	unpack(java.lang.Long... array) Unpack.
static short[]	unpack(java.lang.Short... array) Unpack.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY_OBJECT_ARRAY

public static final java.lang.Object[] EMPTY_OBJECT_ARRAY

An empty immutable Object array.

EMPTY_CLASS_ARRAY

public static final java.lang.Class<?>[] EMPTY_CLASS_ARRAY

An empty immutable Class array.

EMPTY_STRING_ARRAY

public static final java.lang.String[] EMPTY_STRING_ARRAY

An empty immutable String array.

EMPTY_LONG_ARRAY

public static final long[] EMPTY_LONG_ARRAY

An empty immutable long array.

EMPTY_LONG_OBJECT_ARRAY

public static final java.lang.Long[] EMPTY_LONG_OBJECT_ARRAY

An empty immutable Long array.

EMPTY_INT_ARRAY

public static final int[] EMPTY_INT_ARRAY

An empty immutable int array.

EMPTY_INTEGER_OBJECT_ARRAY

public static final java.lang.Integer[] EMPTY_INTEGER_OBJECT_ARRAY

An empty immutable Integer array.

EMPTY_SHORT_ARRAY

public static final short[] EMPTY_SHORT_ARRAY

An empty immutable short array.

EMPTY_SHORT_OBJECT_ARRAY

public static final java.lang.Short[] EMPTY_SHORT_OBJECT_ARRAY

An empty immutable Short array.

EMPTY_BYTE_ARRAY

public static final byte[] EMPTY_BYTE_ARRAY

An empty immutable byte array.

EMPTY_BYTE_OBJECT_ARRAY

public static final java.lang.Byte[] EMPTY_BYTE_OBJECT_ARRAY

An empty immutable Byte array.

EMPTY_DOUBLE_ARRAY

public static final double[] EMPTY_DOUBLE_ARRAY

An empty immutable double array.

EMPTY_DOUBLE_OBJECT_ARRAY

public static final java.lang.Double[] EMPTY_DOUBLE_OBJECT_ARRAY

An empty immutable Double array.

EMPTY_FLOAT_ARRAY

public static final float[] EMPTY_FLOAT_ARRAY

An empty immutable float array.

EMPTY_FLOAT_OBJECT_ARRAY

public static final java.lang.Float[] EMPTY_FLOAT_OBJECT_ARRAY

An empty immutable Float array.

EMPTY_BOOLEAN_ARRAY

public static final boolean[] EMPTY_BOOLEAN_ARRAY

An empty immutable boolean array.

EMPTY_BOOLEAN_OBJECT_ARRAY

public static final java.lang.Boolean[] EMPTY_BOOLEAN_OBJECT_ARRAY

An empty immutable Boolean array.

EMPTY_CHAR_ARRAY

public static final char[] EMPTY_CHAR_ARRAY

An empty immutable char array.

EMPTY_CHARACTER_OBJECT_ARRAY

public static final java.lang.Character[] EMPTY_CHARACTER_OBJECT_ARRAY

An empty immutable Character array.

Method Detail

isEmpty

public static boolean isEmpty(java.lang.Object array)

返回传入数组是否为空（是null或size=0）. 当传入对象不是数组时，只会进行null的判断

Parameters:

array - 传入的数组

Returns:

传入数组是否为空

isNotEmpty

public static boolean isNotEmpty(java.lang.Object array)

返回传入数组是否不为空（是null或size=0）. 当传入对象不是数组时，只会进行null的判断.

Parameters:

array - 传入的数组

Returns:

传入数组是否不为空

isArray

public static boolean isArray(java.lang.Object array)

返回传入对象是否是数组.

Parameters:

array - the object

Returns:

boolean is array

each

public static <T> void each(java.util.function.ObjIntConsumer<T> consumer,
                            T... array)

Each.

Type Parameters:

T - the generic type

Parameters:

consumer - the consumer

array - the array

each

public static void each(java.lang.Object array,
                        java.util.function.ObjIntConsumer<java.lang.Object> consumer)

Each.

Parameters:

array - the array

consumer - the consumer

toString

public static <A> java.lang.String toString(A[] array,
                                            char linkSymbol)

将传入数组进行字符串转换,使用传入的符号作为数组之间的连接符号.

Type Parameters:

A - the generic type

Parameters:

array - 对象数组

linkSymbol - the link symbol

Returns:

字符串

toString

public static java.lang.String toString(java.lang.Object array)

将传入数组进行字符串转换（与Collection的一样使用,分割）

.

Parameters:

array - 对象数组

Returns:

字符串

toString

@SafeVarargs
public static <E> java.lang.String toString(E... objects)

将传入数组进行字符串转换（与Collection的一样使用,分割）

.

Type Parameters:

E - 对象类型

Parameters:

objects - 对象数组

Returns:

字符串

toList

public static <T> java.util.List<T> toList(T... arrays)

To list.

Type Parameters:

T - the generic type

Parameters:

arrays - the arrays

Returns:

the list

toSet

public static <T> java.util.Set<T> toSet(T... arrays)

To set.

Type Parameters:

T - the generic type

Parameters:

arrays - the arrays

Returns:

the sets

toMap

public static <A> java.util.Map<java.lang.Integer,A> toMap(A... arrays)

转换为以数组索引为key,数组值为value的map.

Type Parameters:

A - the generic type

Parameters:

arrays - 数组

Returns:

map

toMap2

@Deprecated
public static <A> java.util.Map<java.lang.String,A> toMap2(A... arrays)

Deprecated. use toMapStringKey(Object...) instead

转换为以数组索引为key(string类型),数组值为value的map.

Type Parameters:

A - the generic type

Parameters:

arrays - 数组

Returns:

列表

toMapStringKey

public static <A> java.util.Map<java.lang.String,A> toMapStringKey(A... arrays)

转换为以数组索引为key(string类型),数组值为value的map.

Type Parameters:

A - the generic type

Parameters:

arrays - 数组

Returns:

列表

toNumbers

public static <A extends java.lang.Number> A[] toNumbers(java.lang.Class<A> type,
                                                         java.lang.String... array)

To number array.

Type Parameters:

A - the generic type

Parameters:

type - the type

array - the array

Returns:

the a[]

fill

public static <T> void fill(T[] target,
                            T[] source)

fill target array with source array .

Type Parameters:

T - 泛型

Parameters:

target - fill target

source - fill source

contain

public static <T> boolean contain(T[] tSet,
                                  T target)

判断第一个传入的数组中是否存在第二个参数 .

Type Parameters:

T - 泛型

Parameters:

tSet - 源数组

target - 查找对象

Returns:

第一个数组中是否存在第二个对象

contain

public static boolean contain(java.lang.String[] strSet,
                              java.lang.String strTarget,
                              boolean ignoreCase)

判断第一个传入的字符串数组中是否存在第二个传入的字符串.

Parameters:

strSet - 源字符串数组

strTarget - 查找字符串

ignoreCase - 忽略大小写

Returns:

第一个数组中是否存在第二个字符串

containString

@Deprecated
public static boolean containString(java.lang.String[] strSet,
                                                 java.lang.String strTarget,
                                                 boolean ignoreCase)

Deprecated. use contain(String[], String, boolean) instead

判断第一个传入的字符串数组中是否存在第二个传入的字符串.

Parameters:

strSet - 源字符串数组

strTarget - 查找字符串

ignoreCase - 忽略大小写

Returns:

第一个数组中是否存在第二个字符串

concat

public static java.lang.Object concat(java.lang.Object arr1,
                                      java.lang.Object arr2)

数组链接 .

Parameters:

arr1 - arr1

arr2 - arr2

Returns:

链接后的数组

newInstance

public static <T> T newInstance(java.lang.Class<?> type,
                                int length)

创建数组 .

Type Parameters:

T - 泛型

Parameters:

type - 类型

length - 长度

Returns:

数组

create

public static <T> T[] create(java.lang.Class<T> type,
                             int length)

创建数组 .

Type Parameters:

T - 泛型

Parameters:

type - 类型

length - 长度

Returns:

数组

create

public static <T> T[] create(java.lang.Class<T> type,
                             int length,
                             java.util.function.IntFunction<T> filler)

create array and fill the array with given filler.

Type Parameters:

T - the array element type

Parameters:

type - the type

length - the length

filler - the filler

Returns:

the array

createFill

public static <T> T[] createFill(java.lang.Class<T> type,
                                 int length,
                                 T element)

create array and fill the array with given argu.

Type Parameters:

T - the array element type

Parameters:

type - the type

length - the length

element - the element

Returns:

the array

fillAll

public static void fillAll(char[] target,
                           char[] source)

fillAll.

Parameters:

target - the target

source - the source

fillAll

public static void fillAll(char[] target,
                           int startIndex,
                           char[] source)

使用source从startIndex填充target.

Parameters:

target - the target

startIndex - the start index

source - the source

fillAll

public static void fillAll(byte[] target,
                           byte[] source)

fillAll.

Parameters:

target - the target

source - the source

fillAll

public static void fillAll(byte[] target,
                           int startIndex,
                           byte[] source)

使用source从startIndex填充target.

Parameters:

target - the target

startIndex - the start index

source - the source

fillAll

public static void fillAll(int[] target,
                           int[] source)

fillAll.

Parameters:

target - the target

source - the source

fillAll

public static void fillAll(int[] target,
                           int startIndex,
                           int[] source)

使用source从startIndex填充target.

Parameters:

target - the target

startIndex - the start index

source - the source

fillAll

public static void fillAll(long[] target,
                           long[] source)

fillAll.

Parameters:

target - the target

source - the source

fillAll

public static void fillAll(long[] target,
                           int startIndex,
                           long[] source)

使用source从startIndex填充target.

Parameters:

target - the target

startIndex - the start index

source - the source

fillAll

public static void fillAll(double[] target,
                           double[] source)

fillAll.

Parameters:

target - the target

source - the source

fillAll

public static void fillAll(double[] target,
                           int startIndex,
                           double[] source)

使用source从startIndex填充target.

Parameters:

target - the target

startIndex - the start index

source - the source

fillAll

public static <T> void fillAll(T[] target,
                               T[] source)

fillAll.

Type Parameters:

T - the generic type

Parameters:

target - the target

source - the source

fillAll

public static <T> void fillAll(T[] target,
                               int startIndex,
                               T[] source)

使用source从startIndex填充target.

Type Parameters:

T - the generic type

Parameters:

target - the target

startIndex - the start index

source - the source

set

public static void set(java.lang.Object array,
                       int index,
                       java.lang.Object value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       int value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       long value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       boolean value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       byte value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       short value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       char value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       double value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

set

public static void set(java.lang.Object array,
                       int index,
                       float value)

sets value for array at index.

Parameters:

array - the array

index - the index

value - the value

unpack

public static int[] unpack(java.lang.Integer... array)

Unpack.

Parameters:

array - the array

Returns:

the int[]

unpack

public static long[] unpack(java.lang.Long... array)

Unpack.

Parameters:

array - the array

Returns:

the long[]

unpack

public static double[] unpack(java.lang.Double... array)

Unpack.

Parameters:

array - the array

Returns:

the double[]

unpack

public static float[] unpack(java.lang.Float... array)

Unpack.

Parameters:

array - the array

Returns:

the float[]

unpack

public static short[] unpack(java.lang.Short... array)

Unpack.

Parameters:

array - the array

Returns:

the short[]

unpack

public static byte[] unpack(java.lang.Byte... array)

Unpack.

Parameters:

array - the array

Returns:

the byte[]

unpack

public static char[] unpack(java.lang.Character... array)

Unpack.

Parameters:

array - the array

Returns:

the char[]

unpack

public static boolean[] unpack(java.lang.Boolean... array)

Unpack.

Parameters:

array - the array

Returns:

the boolean[]