com.jn.langx.util.id.vm

类 UID

java.lang.Object

com.jn.langx.util.id.vm.UID

所有已实现的接口:

Serializable, Cloneable

public class UID
extends Object
implements Serializable, Cloneable

A unique identifier (uniqueness only guarantied inside of the virtual machine in which it was created).

The identifier is composed of:

1. A long generated from the current system time (in milliseconds).
2. A long generated from a counter (which is the number of UID objects that have been created durring the life of the executing virtual machine).

    [ time ] - [ counter ]
 

Numbers are converted to radix(Character.MAX_RADIX) when converting to strings.

This should provide adequate uniqueness for most purposes.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected static AtomicLong	COUNTER A counter for generating identity values
protected long	id The identity portion of the UID
protected long	time The time portion of the UID

构造器概要

构造器

限定符	构造器和说明
	UID() Construct a new UID.
protected	UID(UID uid) Copy a UID.

方法概要

限定符和类型	方法和说明
static String	asString() Returns a UID as a string.
Object	clone() Returns a copy of this UID.
boolean	equals(Object obj) Checks if the given object is equal to this UID.
long	getID() Get the identity portion of this UID.
long	getTime() Get the time portion of this UID.
int	hashCode() Return the hash code of this UID.
String	toString() Return a string representation of this UID.

从类继承的方法 java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

字段详细资料

COUNTER

protected static final AtomicLong COUNTER

A counter for generating identity values

time

protected final long time

The time portion of the UID

id

protected final long id

The identity portion of the UID

构造器详细资料

UID

public UID()

Construct a new UID.

UID

protected UID(UID uid)

Copy a UID.

参数:

uid -

方法详细资料

getTime

public final long getTime()

Get the time portion of this UID.

返回:

The time portion of this UID.

getID

public final long getID()

Get the identity portion of this UID.

返回:

The identity portion of this UID.

toString

public String toString()

Return a string representation of this UID.

覆盖:

toString 在类中 Object

返回:

A string representation of this UID.

hashCode

public int hashCode()

Return the hash code of this UID.

覆盖:

hashCode 在类中 Object

返回:

The hash code of this UID.

equals

public boolean equals(Object obj)

Checks if the given object is equal to this UID.

覆盖:

equals 在类中 Object

参数:

obj - Object to test equality with.

返回:

True if object is equal to this UID.

clone

public Object clone()

Returns a copy of this UID.

覆盖:

clone 在类中 Object

返回:

A copy of this UID.

asString

public static String asString()

Returns a UID as a string.

返回:

UID as a string.