appcoo.util.data

类 ObjectUtil

java.lang.Object

appcoo.util.data.ObjectUtil

public abstract class ObjectUtil
extends java.lang.Object

方法概要

方法

限定符和类型	方法和说明
static <V> int	compare(V v1, V v2) compare two object About result if v1 > v2, return 1 if v1 = v2, return 0 if v1 < v2, return -1 About rule if v1 is null, v2 is null, then return 0 if v1 is null, v2 is not null, then return -1 if v1 is not null, v2 is null, then return 1 return v1.
static boolean	isEquals(java.lang.Object actual, java.lang.Object expected) compare two object
static java.lang.String	nullStrToEmpty(java.lang.Object str) null Object to empty string nullStrToEmpty(null) = ""; nullStrToEmpty("") = ""; nullStrToEmpty("aa") = "aa";
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

方法详细资料

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)

nullStrToEmpty

public static java.lang.String nullStrToEmpty(java.lang.Object str)

null Object to empty string

 nullStrToEmpty(null) = "";
 nullStrToEmpty("") = "";
 nullStrToEmpty("aa") = "aa";
 

参数:

str -

返回:

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:

compare

public static <V> int compare(V v1,
              V v2)

compare two object

About result
• if v1 > v2, return 1
• if v1 = v2, return 0
• if v1 < v2, return -1

About rule
• if v1 is null, v2 is null, then return 0
• if v1 is null, v2 is not null, then return -1
• if v1 is not null, v2 is null, then return 1
• return v1.Comparable.compareTo(Object)

参数:

v1 -

v2 -

返回: