Added in API level 1

Summary: Fields | Methods | Inherited Methods

ObjectStreamClass

public class ObjectStreamClass
extends Object implements Serializable

java.lang.Object
↳	java.io.ObjectStreamClass

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.

See also:

Summary

Fields
`public static final ObjectStreamField[]`	`NO_FIELDS` serialPersistentFields value indicating no serializable fields

Public methods
`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.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Fields

NO_FIELDS

Added in API level 1

public static final ObjectStreamField[] NO_FIELDS

serialPersistentFields value indicating no serializable fields

Public methods

forClass

Added in API level 1

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
`Class<?>`	the `Class` instance that this descriptor represents

getField

Added in API level 1

public ObjectStreamField getField (String name)

Get the field of this class by name.

Parameters
`name`	`String`: the name of the data field to look for

Returns
`ObjectStreamField`	The ObjectStreamField object of the named field or null if there is no such named field.

getFields

Added in API level 1

public ObjectStreamField[] getFields ()

Return an array of the fields of this serializable class.

Returns
`ObjectStreamField[]`	an array containing an element for each persistent field of this class. Returns an array of length zero if there are no fields.

getName

Added in API level 1

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
`String`	a string representing the name of the class

getSerialVersionUID

Added in API level 1

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
`long`	the SUID of the class described by this descriptor

lookup

Added in API level 1

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`: class for which to get the descriptor

Returns
`ObjectStreamClass`	the class descriptor for the specified class

lookupAny

Added in API level 9

public static ObjectStreamClass lookupAny (Class<?> cl)

Returns the descriptor for any class, regardless of whether it implements Serializable.

Parameters
`cl`	`Class`: class for which to get the descriptor

Returns
`ObjectStreamClass`	the class descriptor for the specified class

toString

Added in API level 1

public String toString ()

Return a string describing this ObjectStreamClass.

Returns
`String`	a string representation of the object.