java.lang.Object
java.io.ObjectInputStream.GetField
- Enclosing class:
ObjectInputStream
Provide access to the persistent fields read from the input stream.
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionabstract booleanReturn true if the named field is defaulted and has no value in this stream.abstract booleanGet the value of the named boolean field from the persistent field.abstract byteGet the value of the named byte field from the persistent field.abstract charGet the value of the named char field from the persistent field.abstract doubleGet the value of the named double field from the persistent field.abstract floatGet the value of the named float field from the persistent field.abstract intGet the value of the named int field from the persistent field.abstract longGet the value of the named long field from the persistent field.abstract shortGet the value of the named short field from the persistent field.abstract ObjectGet the value of the named Object field from the persistent field.abstract ObjectStreamClassGet the ObjectStreamClass that describes the fields in the stream.
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Constructor Details
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GetField
public GetField()Constructor for subclasses to call.
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Method Details
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getObjectStreamClass
Get the ObjectStreamClass that describes the fields in the stream.- Returns:
- the descriptor class that describes the serializable fields
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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 underlyingInputStreamIllegalArgumentException- ifnamedoes not correspond to a serializable field
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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 ifnamedoes not have a value- Returns:
- the value of the named
booleanfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
bytefield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
charfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
shortfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
intfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
longfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
floatfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
doublefield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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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 ifnamedoes not have a value- Returns:
- the value of the named
Objectfield - Throws:
ClassNotFoundException- Class of a serialized object cannot be found.IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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