JavaTM 2 Platform
Std. Ed. v1.3.1

java.io
Class ObjectInputStream.GetField

java.lang.Object
  |
  +--java.io.ObjectInputStream.GetField
Enclosing class:
ObjectInputStream

public abstract static class ObjectInputStream.GetField
extends Object

Provide access to the persistent fields read from the input stream.


Constructor Summary
ObjectInputStream.GetField()
           
 
Method Summary
abstract  boolean defaulted(String name)
          Return true if the named field is defaulted and has no value in this stream.
abstract  boolean get(String name, boolean defvalue)
          Get the value of the named boolean field from the persistent field.
abstract  byte get(String name, byte defvalue)
          Get the value of the named byte field from the persistent fields.
abstract  char get(String name, char defvalue)
          Get the value of the named char field from the persistent fields.
abstract  double get(String name, double defvalue)
          Get the value of the named double field from the persistent field.
abstract  float get(String name, float defvalue)
          Get the value of the named float field from the persistent fields.
abstract  int get(String name, int defvalue)
          Get the value of the named int field from the persistent fields.
abstract  long get(String name, long defvalue)
          Get the value of the named long field from the persistent fields.
abstract  Object get(String name, Object defvalue)
          Get the value of the named Object field from the persistent field.
abstract  short get(String name, short defvalue)
          Get the value of the named short field from the persistent fields.
abstract  ObjectStreamClass getObjectStreamClass()
          Get the ObjectStreamClass that describes the fields in the stream.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ObjectInputStream.GetField

public ObjectInputStream.GetField()
Method Detail

getObjectStreamClass

public abstract ObjectStreamClass getObjectStreamClass()
Get the ObjectStreamClass that describes the fields in the stream.
Returns:
the descriptor class that describes the serializable fields

defaulted

public abstract boolean defaulted(String name)
                           throws IOException,
                                  IllegalArgumentException
Return true if the named field is defaulted and has no value in this stream.
Parameters:
name - the name of the field
Returns:
true, if and only if the named field is defaulted
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if name does not correspond to a serializable field

get

public abstract boolean get(String name,
                            boolean defvalue)
                     throws IOException,
                            IllegalArgumentException
Get the value of the named boolean field from the persistent field.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named boolean field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract char get(String name,
                         char defvalue)
                  throws IOException,
                         IllegalArgumentException
Get the value of the named char field from the persistent fields.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named char field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract byte get(String name,
                         byte defvalue)
                  throws IOException,
                         IllegalArgumentException
Get the value of the named byte field from the persistent fields.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named byte field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract short get(String name,
                          short defvalue)
                   throws IOException,
                          IllegalArgumentException
Get the value of the named short field from the persistent fields.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named short field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract int get(String name,
                        int defvalue)
                 throws IOException,
                        IllegalArgumentException
Get the value of the named int field from the persistent fields.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named int field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract long get(String name,
                         long defvalue)
                  throws IOException,
                         IllegalArgumentException
Get the value of the named long field from the persistent fields.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named long field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract float get(String name,
                          float defvalue)
                   throws IOException,
                          IllegalArgumentException
Get the value of the named float field from the persistent fields.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named float field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract double get(String name,
                           double defvalue)
                    throws IOException,
                           IllegalArgumentException
Get the value of the named double field from the persistent field.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named double field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

get

public abstract Object get(String name,
                           Object defvalue)
                    throws IOException,
                           IllegalArgumentException
Get the value of the named Object field from the persistent field.
Parameters:
name - the name of the field
defvalue - the default value to use if name does not have a value
Returns:
the value of the named Object field
Throws:
IOException - if there are I/O errors while reading from the underlying InputStream
IllegalArgumentException - if type of name is not serializable or if the field type is incorrect

JavaTM 2 Platform
Std. Ed. v1.3.1

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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