```
public abstract class ObjectIdHelper
extends Object
```
Type of an object id. This provides the identity of a particular object that was created by an object adapter.

构造方法
Constructor	描述
`ObjectIdHelper()`

所有方法静态方法具体的方法
Modifier and Type	方法	描述
`static byte[]`	`extract(Any a)`
`static String`	`id()`
`static void`	`insert(Any a, byte[] that)`
`static byte[]`	`read(InputStream istream)`
`static TypeCode`	`type()`
`static void`	`write(OutputStream ostream, byte[] value)`

public static void insert(Any a,
                          byte[] that)

public static byte[] extract(Any a)

public static byte[] read(InputStream istream)

public static void write(OutputStream ostream,
                         byte[] value)

Class ObjectIdHelper