ObjectInputStream.GetField (Java SE 9 & JDK 9 )

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

Constructors
Constructor Description

GetField ()

Constructors
Constructor	Description
`GetField ()`

Method Summary

All Methods
Modifier and Type	Method	Description
`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 val)`	Get the value of the named boolean field from the persistent field.
`abstract byte`	`get (String name, byte val)`	Get the value of the named byte field from the persistent field.
`abstract char`	`get (String name, char val)`	Get the value of the named char field from the persistent field.
`abstract double`	`get (String name, double val)`	Get the value of the named double field from the persistent field.
`abstract float`	`get (String name, float val)`	Get the value of the named float field from the persistent field.
`abstract int`	`get (String name, int val)`	Get the value of the named int field from the persistent field.
`abstract long`	`get (String name, long val)`	Get the value of the named long field from the persistent field.
`abstract short`	`get (String name, short val)`	Get the value of the named short field from the persistent field.
`abstract Object`	`get (String name, Object val)`	Get the value of the named Object field from the persistent field.
`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
  - GetField
```
public 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 
```
    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 val)
 throws IOException 
```
    Get the value of the named boolean field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 byte get(String name,
 byte val)
 throws IOException 
```
    Get the value of the named byte field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 char get(String name,
 char val)
 throws IOException 
```
    Get the value of the named char field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 short get(String name,
 short val)
 throws IOException 
```
    Get the value of the named short field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 val)
 throws IOException 
```
    Get the value of the named int field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 val)
 throws IOException 
```
    Get the value of the named long field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 val)
 throws IOException 
```
    Get the value of the named float field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 val)
 throws IOException 
```
    Get the value of the named double field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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 val)
 throws IOException 
```
    Get the value of the named Object field from the persistent field.
    
    Parameters:
    
    name - the name of the field
    
    val - 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

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Class ObjectInputStream.GetField

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

GetField

Method Detail

getObjectStreamClass

defaulted

get

get

get

get

get

get

get

get

get