com.marshalchen.common.commonUtils.basicUtils

类 ArrayUtils

java.lang.Object

com.marshalchen.common.commonUtils.basicUtils.ArrayUtils

public class ArrayUtils
extends java.lang.Object

Array Utils

• isEmpty(Object[]) is null or its length is 0
• getLast(Object[], Object, Object, boolean) get last element of the target element, before the first one that match the target element front to back
• getNext(Object[], Object, Object, boolean) get next element of the target element, after the first one that match the target element front to back
• getLast(Object[], Object, boolean)
• getLast(int[], int, int, boolean)
• getLast(long[], long, long, boolean)
• getNext(Object[], Object, boolean)
• getNext(int[], int, int, boolean)
• getNext(long[], long, long, boolean)

构造器概要

构造器

构造器和说明
ArrayUtils()

方法概要

方法

限定符和类型	方法和说明
static int	getLast(int[] sourceArray, int value, int defaultValue, boolean isCircle)
static long	getLast(long[] sourceArray, long value, long defaultValue, boolean isCircle)
static <V> V	getLast(V[] sourceArray, V value, boolean isCircle)
static <V> V	getLast(V[] sourceArray, V value, V defaultValue, boolean isCircle) get last element of the target element, before the first one that match the target element front to back if array is empty, return defaultValue if target element is not exist in array, return defaultValue if target element exist in array and its index is not 0, return the last element if target element exist in array and its index is 0, return the last one in array if isCircle is true, else return defaultValue
static int	getNext(int[] sourceArray, int value, int defaultValue, boolean isCircle)
static long	getNext(long[] sourceArray, long value, long defaultValue, boolean isCircle)
static <V> V	getNext(V[] sourceArray, V value, boolean isCircle)
static <V> V	getNext(V[] sourceArray, V value, V defaultValue, boolean isCircle) get next element of the target element, after the first one that match the target element front to back if array is empty, return defaultValue if target element is not exist in array, return defaultValue if target element exist in array and not the last one in array, return the next element if target element exist in array and the last one in array, return the first one in array if isCircle is true, else return defaultValue
static <V> boolean	isEmpty(V[] sourceArray) is null or its length is 0
static boolean	isEquals(java.lang.Object actual, java.lang.Object expected) compare two object
static void	iteratorArrayList(java.util.ArrayList arrayList)
static void	iteratorHashMap(java.util.HashMap<java.lang.String,java.lang.Object> hashMap)
static void	iteratorHashMapString(java.util.HashMap<java.lang.String,java.lang.String> map)
static void	iteratorList(java.util.List inputList)
static java.lang.Integer[]	transformIntArray(int[] source) convert int array to Integer array
static int[]	transformIntArray(java.lang.Integer[] source) convert Integer array to int array
static java.lang.Long[]	transformLongArray(long[] source) convert long array to Long array
static long[]	transformLongArray(java.lang.Long[] source) convert Long array to long array

从类继承的方法 java.lang.Object

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

构造器详细资料

ArrayUtils

public ArrayUtils()

方法详细资料

isEmpty

public static <V> boolean isEmpty(V[] sourceArray)

is null or its length is 0

类型参数:

V -

参数:

sourceArray -

返回:

getLast

public static <V> V getLast(V[] sourceArray,
            V value,
            V defaultValue,
            boolean isCircle)

get last element of the target element, before the first one that match the target element front to back

• if array is empty, return defaultValue
• if target element is not exist in array, return defaultValue
• if target element exist in array and its index is not 0, return the last element
• if target element exist in array and its index is 0, return the last one in array if isCircle is true, else return defaultValue

类型参数:

V -

参数:

sourceArray -

value - value of target element

defaultValue - default return value

isCircle - whether is circle

返回:

getNext

public static <V> V getNext(V[] sourceArray,
            V value,
            V defaultValue,
            boolean isCircle)

get next element of the target element, after the first one that match the target element front to back

• if array is empty, return defaultValue
• if target element is not exist in array, return defaultValue
• if target element exist in array and not the last one in array, return the next element
• if target element exist in array and the last one in array, return the first one in array if isCircle is true, else return defaultValue

类型参数:

V -

参数:

sourceArray -

value - value of target element

defaultValue - default return value

isCircle - whether is circle

返回:

getLast

public static <V> V getLast(V[] sourceArray,
            V value,
            boolean isCircle)

另请参阅:

ArrayUtils#getLast(Object[], Object, Object, boolean)} defaultValue is null

getNext

public static <V> V getNext(V[] sourceArray,
            V value,
            boolean isCircle)

另请参阅:

ArrayUtils#getNext(Object[], Object, Object, boolean)} defaultValue is null

getLast

public static long getLast(long[] sourceArray,
           long value,
           long defaultValue,
           boolean isCircle)

另请参阅:

ArrayUtils#getLast(Object[], Object, Object, boolean)} Object is Long

getNext

public static long getNext(long[] sourceArray,
           long value,
           long defaultValue,
           boolean isCircle)

另请参阅:

ArrayUtils#getNext(Object[], Object, Object, boolean)} Object is Long

getLast

public static int getLast(int[] sourceArray,
          int value,
          int defaultValue,
          boolean isCircle)

另请参阅:

ArrayUtils#getLast(Object[], Object, Object, boolean)} Object is Integer

getNext

public static int getNext(int[] sourceArray,
          int value,
          int defaultValue,
          boolean isCircle)

另请参阅:

ArrayUtils#getNext(Object[], Object, Object, boolean)} Object is Integer

iteratorArrayList

public static void iteratorArrayList(java.util.ArrayList arrayList)

iteratorList

public static void iteratorList(java.util.List inputList)

iteratorHashMap

public static void iteratorHashMap(java.util.HashMap<java.lang.String,java.lang.Object> hashMap)

iteratorHashMapString

public static void iteratorHashMapString(java.util.HashMap<java.lang.String,java.lang.String> map)

isEquals

public static boolean isEquals(java.lang.Object actual,
               java.lang.Object expected)

compare two object

参数:

actual -

expected -

返回:

• if both are null, return true
• return actual.Object.equals(Object)

transformLongArray

public static java.lang.Long[] transformLongArray(long[] source)

convert long array to Long array

参数:

source -

返回:

transformLongArray

public static long[] transformLongArray(java.lang.Long[] source)

convert Long array to long array

参数:

source -

返回:

transformIntArray

public static java.lang.Integer[] transformIntArray(int[] source)

convert int array to Integer array

参数:

source -

返回:

transformIntArray

public static int[] transformIntArray(java.lang.Integer[] source)

convert Integer array to int array

参数:

source -

返回: