Module java.base
Package java.io

# Class ObjectOutputStream.PutField

java.lang.Object
java.io.ObjectOutputStream.PutField

Enclosing class:
  `ObjectOutputStream`

public abstract static class ObjectOutputStream.PutField extends Object
Provide programmatic access to the persistent fields to be written to ObjectOutput.

Since:
  1.2

## Constructor Summary

Constructors
Constructor
Description
`PutField()`
Constructor for subclasses to call.

## Method Summary

Modifier and Type
Method
Description
`abstract void`
`put(String name, boolean val)`
Put the value of the named boolean field into the persistent field.
`abstract void`
`put(String name, byte val)`
Put the value of the named byte field into the persistent field.
`abstract void`
`put(String name, char val)`
Put the value of the named char field into the persistent field.
`abstract void`
`put(String name, double val)`
Put the value of the named double field into the persistent field.
`abstract void`
`put(String name, float val)`
Put the value of the named float field into the persistent field.
`abstract void`
`put(String name, int val)`
Put the value of the named int field into the persistent field.
`abstract void`
`put(String name, long val)`
Put the value of the named long field into the persistent field.
`abstract void`
`put(String name, short val)`
Put the value of the named short field into the persistent field.
`abstract void`
`put(String name, Object val)`
Put the value of the named Object field into the persistent field.
`abstract void`
`write(ObjectOutput out)`
Deprecated.
This method does not write the values contained by this `PutField` object in a proper format, and may result in corruption of the serialization stream.

### Methods declared in class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

## Constructor Details

### PutField

public PutField()
Constructor for subclasses to call.

## Method Details

### put

public abstract void put(String name, boolean val)
Put the value of the named boolean field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `boolean`

### put

public abstract void put(String name, byte val)
Put the value of the named byte field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `byte`

### put

public abstract void put(String name, char val)
Put the value of the named char field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `char`

### put

public abstract void put(String name, short val)
Put the value of the named short field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `short`

### put

public abstract void put(String name, int val)
Put the value of the named int field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `int`

### put

public abstract void put(String name, long val)
Put the value of the named long field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `long`

### put

public abstract void put(String name, float val)
Put the value of the named float field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `float`

### put

public abstract void put(String name, double val)
Put the value of the named double field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not `double`

### put

public abstract void put(String name, Object val)
Put the value of the named Object field into the persistent field.

Parameters:
  `name` - the name of the serializable field
  `val` - the value to assign to the field (which may be `null`)
Throws:
  `IllegalArgumentException` - if `name` does not match the name of a serializable field for the class whose fields are being written, or if the type of the named field is not a reference type

### write

@Deprecated public abstract void write(ObjectOutput out) throws IOException
Deprecated.
This method does not write the values contained by this `PutField` object in a proper format, and may result in corruption of the serialization stream. The correct way to write `PutField` data is by calling the `ObjectOutputStream.writeFields()` method.
Write the data and fields to the specified ObjectOutput stream, which must be the same stream that produced this `PutField` object.

Parameters:
  `out` - the stream to write the data and fields to
Throws:
  `IOException` - if I/O errors occur while writing to the underlying stream
  `IllegalArgumentException` - if the specified stream is not the same stream that produced this `PutField` object