cn.t.util.common

Class ObjectUtil

java.lang.Object

cn.t.util.common.ObjectUtil

public class ObjectUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
ObjectUtil()

Method Summary

Modifier and Type	Method and Description
static int	hashCode(boolean bool) Return the same value as Boolean.hashCode()}.
static int	hashCode(double dbl) Return the same value as Double.hashCode()}.
static int	hashCode(float flt) Return the same value as Float.hashCode()}.
static int	hashCode(long lng) Return the same value as Long.hashCode()}.
static boolean	isEmpty(Object[] array)
static boolean	isNotNull(Object obj)
static boolean	isNull(Object obj)
static boolean	nullSafeEquals(Object o1, Object o2) Determine if the given objects are equal, returning true if both are null or false if only one is null.
static int	nullSafeHashCode(boolean[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(byte[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(char[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(double[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(float[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(int[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(long[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(Object obj) Return as hash code for the given object; typically the value of Object#hashCode()}.
static int	nullSafeHashCode(Object[] array) Return a hash code based on the contents of the specified array.
static int	nullSafeHashCode(short[] array) Return a hash code based on the contents of the specified array.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectUtil

public ObjectUtil()

Method Detail

isNull

public static boolean isNull(Object obj)

isEmpty

public static boolean isEmpty(Object[] array)

isNotNull

public static boolean isNotNull(Object obj)

nullSafeHashCode

public static int nullSafeHashCode(Object obj)

Return as hash code for the given object; typically the value of Object#hashCode()}. If the object is an array, this method will delegate to any of the nullSafeHashCode methods for arrays in this class. If the object is null, this method returns 0.

Parameters:

obj - xxx

Returns:

xxx

See Also:

Object.hashCode(), nullSafeHashCode(Object[]), nullSafeHashCode(boolean[]), nullSafeHashCode(byte[]), nullSafeHashCode(char[]), nullSafeHashCode(double[]), nullSafeHashCode(float[]), nullSafeHashCode(int[]), nullSafeHashCode(long[]), nullSafeHashCode(short[])

nullSafeHashCode

public static int nullSafeHashCode(Object[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(boolean[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(byte[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(char[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(double[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(float[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(int[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(long[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

nullSafeHashCode

public static int nullSafeHashCode(short[] array)

Return a hash code based on the contents of the specified array. If array is null, this method returns 0.

Parameters:

array - xxx

Returns:

xxx

hashCode

public static int hashCode(boolean bool)

Return the same value as Boolean.hashCode()}.

Parameters:

bool - xxx

Returns:

xxx

See Also:

Boolean.hashCode()

hashCode

public static int hashCode(double dbl)

Return the same value as Double.hashCode()}.

Parameters:

dbl - xxx

Returns:

xxx

See Also:

Double.hashCode()

hashCode

public static int hashCode(float flt)

Return the same value as Float.hashCode()}.

Parameters:

flt - xxx

Returns:

xxx

See Also:

Float.hashCode()

hashCode

public static int hashCode(long lng)

Return the same value as Long.hashCode()}.

Parameters:

lng - xxx

Returns:

xxx

See Also:

Long.hashCode()

nullSafeEquals

public static boolean nullSafeEquals(Object o1,
                                     Object o2)

Determine if the given objects are equal, returning true if both are null or false if only one is null.

Compares arrays with Arrays.equals, performing an equality check based on the array elements rather than the array reference.

Parameters:

o1 - first Object to compare

o2 - second Object to compare

Returns:

whether the given objects are equal

See Also:

Object.equals(Object), Arrays.equals(long[], long[])