java.lang.Object
- java.io.ObjectStreamClass

All Implemented Interfaces:

Serializable
```
public class ObjectStreamClass
extends Object
implements Serializable
```
Serialization's descriptor for classes. It contains the name and serialVersionUID of the class. The ObjectStreamClass for a specific class loaded in this Java VM can be found/created using the lookup method.
The algorithm to compute the SerialVersionUID is described in Object Serialization Specification, Section 4.6, Stream Unique Identifiers.

Since:

JDK1.1

See Also:
ObjectStreamField, Object Serialization Specification, Section 4, Class Descriptors, Serialized Form

Field Summary

Fields
Modifier and Type Field and Description

static ObjectStreamField[] NO_FIELDS
serialPersistentFields value indicating no serializable fields

Method Summary

Methods
Modifier and Type	Method and Description
`Class<?>`	`forClass()` Return the class in the local VM that this version is mapped to.
`ObjectStreamField`	`getField(String name)` Get the field of this class by name.
`ObjectStreamField[]`	`getFields()` Return an array of the fields of this serializable class.
`String`	`getName()` Returns the name of the class described by this descriptor.
`long`	`getSerialVersionUID()` Return the serialVersionUID for this class.
`static ObjectStreamClass`	`lookup(Class<?> cl)` Find the descriptor for a class that can be serialized.
`static ObjectStreamClass`	`lookupAny(Class<?> cl)` Returns the descriptor for any class, regardless of whether it implements `Serializable`.
`String`	`toString()` Return a string describing this ObjectStreamClass.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - NO_FIELDS
```
public static final ObjectStreamField[] NO_FIELDS
```
    serialPersistentFields value indicating no serializable fields
- Method Detail
  - lookup
```
public static ObjectStreamClass lookup(Class<?> cl)
```
    Find the descriptor for a class that can be serialized. Creates an ObjectStreamClass instance if one does not exist yet for class. Null is returned if the specified class does not implement java.io.Serializable or java.io.Externalizable.
    
    Parameters:
    cl - class for which to get the descriptor
    
    Returns:
    the class descriptor for the specified class
  - lookupAny
```
public static ObjectStreamClass lookupAny(Class<?> cl)
```
    Returns the descriptor for any class, regardless of whether it implements Serializable.
    
    Parameters:
    cl - class for which to get the descriptor
    
    Returns:
    the class descriptor for the specified class
    Since:
    
    1.6
  - getName
```
public String getName()
```
    Returns the name of the class described by this descriptor. This method returns the name of the class in the format that is used by the Class.getName() method.
    
    Returns:
    a string representing the name of the class
  - getSerialVersionUID
```
public long getSerialVersionUID()
```
    Return the serialVersionUID for this class. The serialVersionUID defines a set of classes all with the same name that have evolved from a common root class and agree to be serialized and deserialized using a common format. NonSerializable classes have a serialVersionUID of 0L.
    
    Returns:
    the SUID of the class described by this descriptor
  - forClass
```
public Class<?> forClass()
```
    Return the class in the local VM that this version is mapped to. Null is returned if there is no corresponding local class.
    
    Returns:
    the Class instance that this descriptor represents
  - getFields
```
public ObjectStreamField[] getFields()
```
    Return an array of the fields of this serializable class.
    
    Returns:
    an array containing an element for each persistent field of this class. Returns an array of length zero if there are no fields.
    Since:
    
    1.2
  - getField
```
public ObjectStreamField getField(String name)
```
    Get the field of this class by name.
    
    Parameters:
    name - the name of the data field to look for
    
    Returns:
    The ObjectStreamField object of the named field or null if there is no such named field.
  - toString
```
public String toString()
```
    Return a string describing this ObjectStreamClass.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    a string representation of the object.

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Document créé le 07/08/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-java/io/objectstreamclass.html

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Références

Manuel PHP : https://docs.oracle.com, ObjectStreamClass

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Table des matières Haut

Class ObjectStreamClass

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NO_FIELDS

Method Detail

lookup

lookupAny

getName

getSerialVersionUID

forClass

getFields

getField

toString

Références