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 and Description

ObjectInputStream.GetField()

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Method Summary

Methods
Modifier and Type	Method and 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 Object`	`get(String name, Object val)` Get the value of the named Object 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 ObjectStreamClass`	`getObjectStreamClass()` Get the ObjectStreamClass that describes the fields in the stream.

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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
```
    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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Vielen Dank im Voraus.

Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-java/io/objectinputstream.getfield.html

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Referenzen

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Inhaltsverzeichnis Haut

Class ObjectInputStream.GetField

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ObjectInputStream.GetField

Method Detail

getObjectStreamClass

defaulted

get

get

get

get

get

get

get

get

get

Referenzen