cn.trinea.android.common.util

Class ArrayUtils

java.lang.Object

cn.trinea.android.common.util.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)

Author:

Trinea 2011-10-24

Constructor Summary

Constructors

Constructor and Description
ArrayUtils()

Method Summary

Methods

Modifier and Type	Method and Description
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

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtils

public ArrayUtils()

Method Detail

isEmpty

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

is null or its length is 0

Type Parameters:

V -

Parameters:

sourceArray -

Returns:

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

Type Parameters:

V -

Parameters:

sourceArray -

value - value of target element

defaultValue - default return value

isCircle - whether is circle

Returns:

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

Type Parameters:

V -

Parameters:

sourceArray -

value - value of target element

defaultValue - default return value

isCircle - whether is circle

Returns:

getLast

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

See Also:

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

getNext

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

See Also:

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

getLast

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

See Also:

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

getNext

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

See Also:

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

getLast

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

See Also:

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

getNext

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

See Also:

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