Class ObjectInputStream.GetField
java.lang.Object
java.io.ObjectInputStream.GetField
- Enclosing class:
ObjectInputStream
Provide access to the persistent fields read from the input stream.
-
Constructor Summary
-
Method Summary
Modifier and TypeMethodDescriptionabstract boolean
Return true if the named field is defaulted and has no value in this stream.abstract boolean
Get the value of the named boolean field from the persistent field.abstract byte
Get the value of the named byte field from the persistent field.abstract char
Get the value of the named char field from the persistent field.abstract double
Get the value of the named double field from the persistent field.abstract float
Get the value of the named float field from the persistent field.abstract int
Get the value of the named int field from the persistent field.abstract long
Get the value of the named long field from the persistent field.abstract short
Get the value of the named short field from the persistent field.abstract Object
Get the value of the named Object field from the persistent field.abstract ObjectStreamClass
Get the ObjectStreamClass that describes the fields in the stream.
-
Constructor Details
-
GetField
public GetField()Constructor for subclasses to call.
-
-
Method Details
-
getObjectStreamClass
Get the ObjectStreamClass that describes the fields in the stream.- Returns:
- the descriptor class that describes the serializable fields
-
defaulted
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 underlyingInputStream
IllegalArgumentException
- ifname
does not correspond to a serializable field
-
get
Get the value of the named boolean field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named byte field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named char field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named short field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named int field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named long field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named float field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named double field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
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 underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-
get
Get the value of the named Object field from the persistent field.- Parameters:
name
- the name of the fieldval
- the default value to use ifname
does not have a value- Returns:
- the value of the named
Object
field - Throws:
ClassNotFoundException
- Class of a serialized object cannot be found.IOException
- if there are I/O errors while reading from the underlyingInputStream
IllegalArgumentException
- if type ofname
is not serializable or if the field type is incorrect
-