- 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:
- 1.1
- See Also:
- ObjectStreamField, Object Serialization Specification, Section 4, Class Descriptors, Serialized Form
 
- 
- 
Field SummaryFields Modifier and Type Field Description static ObjectStreamField[]NO_FIELDSserialPersistentFields value indicating no serializable fields
 - 
Method SummaryAll Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Class<?>forClass()Return the class in the local VM that this version is mapped to.ObjectStreamFieldgetField(String name)Get the field of this class by name.ObjectStreamField[]getFields()Return an array of the fields of this serializable class.StringgetName()Returns the name of the class described by this descriptor.longgetSerialVersionUID()Return the serialVersionUID for this class.static ObjectStreamClasslookup(Class<?> cl)Find the descriptor for a class that can be serialized.static ObjectStreamClasslookupAny(Class<?> cl)Returns the descriptor for any class, regardless of whether it implementsSerializable.StringtoString()Return a string describing this ObjectStreamClass.
 
- 
- 
- 
Field Detail- 
NO_FIELDSpublic static final ObjectStreamField[] NO_FIELDS serialPersistentFields value indicating no serializable fields
 
- 
 - 
Method Detail- 
lookuppublic 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
 
 - 
lookupAnypublic static ObjectStreamClass lookupAny(Class<?> cl) Returns the descriptor for any class, regardless of whether it implementsSerializable.- Parameters:
- cl- class for which to get the descriptor
- Returns:
- the class descriptor for the specified class
- Since:
- 1.6
 
 - 
getNamepublic 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 theClass.getName()method.- Returns:
- a string representing the name of the class
 
 - 
getSerialVersionUIDpublic 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
 
 - 
forClasspublic 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 Classinstance that this descriptor represents
 
 - 
getFieldspublic 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
 
 - 
getFieldpublic 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.
 
 
- 
 
-