cn.watsontech.core.utils

类 ObjectId

java.lang.Object

cn.watsontech.core.utils.ObjectId

所有已实现的接口:

Serializable, Comparable<ObjectId>

public class ObjectId
extends Object
implements Comparable<ObjectId>, Serializable

A globally unique identifier for objects.

Consists of 12 bytes, divided as follows:

ObjectID layout

0	1	2	3	4	5	6	7	8	9	10	11
time				machine			pid		inc

Instances of this class are immutable.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
ObjectId() Create a new object id.

方法概要

限定符和类型	方法和说明
int	compareTo(ObjectId id)
boolean	equals(Object o)
static ObjectId	get() Gets a new object id.
static int	getCurrentCounter() Gets the current value of the auto-incrementing counter.
Date	getDate() Gets the timestamp as a Date instance.
int	getTimestamp() Gets the timestamp (number of seconds since the Unix epoch).
int	hashCode()
static String	id() 生成新id
static boolean	isValid(String s) Checks if a string could be an ObjectId.
static void	main(String[] args)
byte[]	toByteArray() Convert to a byte array.
String	toHexString() Converts this instance into a 24-byte hexadecimal string representation.

从类继承的方法 java.lang.Object

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

构造器详细资料

ObjectId

public ObjectId()

Create a new object id.

方法详细资料

id

public static String id()

生成新id

get

public static ObjectId get()

Gets a new object id.

返回:

the new id

isValid

public static boolean isValid(String s)

Checks if a string could be an ObjectId.

参数:

s - a potential ObjectId as a String.

返回:

whether the string could be an object id

抛出:

IllegalArgumentException - if hexString is null

toHexString

public String toHexString()

Converts this instance into a 24-byte hexadecimal string representation.

返回:

a string representation of the ObjectId in hexadecimal format

toByteArray

public byte[] toByteArray()

Convert to a byte array. Note that the numbers are stored in big-endian order.

返回:

the byte array

compareTo

public int compareTo(ObjectId id)

指定者:

compareTo 在接口中 Comparable<ObjectId>

getTimestamp

public int getTimestamp()

Gets the timestamp (number of seconds since the Unix epoch).

返回:

the timestamp

getDate

public Date getDate()

Gets the timestamp as a Date instance.

返回:

the Date

getCurrentCounter

public static int getCurrentCounter()

Gets the current value of the auto-incrementing counter.

返回:

the current counter value.

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

main

public static void main(String[] args)