Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class ObjectStreamField - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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Java^TM 2 Platform
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java.io
Class ObjectStreamField

java.lang.Object
  |
  +--java.io.ObjectStreamField

public class ObjectStreamField
extends Object
implements Comparable

A description of a Serializable field from a Serializable class. An array of ObjectStreamFields is used to declare the Serializable fields of a class.

See Also:: ObjectStreamClass

Constructor Summary

ObjectStreamField(String n, Class clazz)
          Create a Serializable field with the specified type.

Method Summary

int compareTo(Object o)
          Compare this field with another ObjectStreamField.

String getName()
          Get the name of this field.

int getOffset()
          Offset of field within instance data.

Class getType()
          Get the type of the field.

char getTypeCode()
          Returns character encoding of field type.

String getTypeString()
          Return the JVM type signature.

boolean isPrimitive()
          Return true if this field has a primitive type.

protected void setOffset(int offset)
          Offset within instance data.

String toString()
          Return a string that describes this field.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectStreamField

public ObjectStreamField(String n,
                         Class clazz)

Create a Serializable field with the specified type. This field should be documented with a serialField tag.

Method Detail

getName

public String getName()

Get the name of this field.

getType

public Class getType()

Get the type of the field.

getTypeCode

public char getTypeCode()

Returns character encoding of field type. The encoding is as follows:

 B            byte
 C            char
 D            double
 F            float
 I            int
 J            long
 L            class or interface
 S            short
 Z            boolean
 [            array

getTypeString

public String getTypeString()

Return the JVM type signature.

getOffset

public int getOffset()

Offset of field within instance data.

setOffset

protected void setOffset(int offset)

Offset within instance data.

isPrimitive

public boolean isPrimitive()

Return true if this field has a primitive type.

compareTo

public int compareTo(Object o)

Compare this field with another ObjectStreamField. Return -1 if this is smaller, 0 if equal, 1 if greater. Types that are primitives are "smaller" than object types. If equal, the field names are compared.

Specified by:: compareTo in interface Comparable

Tags copied from interface: Comparable

Parameters:: o - the Object to be compared.
Returns:: a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.
Throws:: ClassCastException - if the specified object's type prevents it from being compared to this Object.

toString

public String toString()

Return a string that describes this field.

Overrides:: toString in class Object

Tags copied from class: Object

Returns:: a string representation of the object.