Java ObjectStreamField class

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

The java.io.ObjectStreamClass.getField(String name) method gets the field of this class by name.

Constructor

Constructor	Description
ObjectStreamField(String name, Class<?> type)	It creates a Serializable field with the specified type.
ObjectStreamField(String name, Class<?> type, boolean unshared)	It creates an ObjectStreamField representing a serializable field with the given name and type.

Methods

Modifier and Type	Method	Description
int	compareTo(Object obj)	It compares this field with another ObjectStreamField.
String	getName()	It gets the name of this field.
int	GetOffset()	Offset of field within instance data.
Class<?>	getType()	It get the type of the field.
char	getTypeCode()	It returns character encoding of field type.
String	getTypeString()	It return the JVM type signature.
boolean	isPrimitive()	It return true if this field has a primitive type.
boolean	isUnshared()	It returns boolean value indicating whether or not the serializable field represented by this ObjectStreamField instance is unshared.
protected void	setOffset(int offset)	Offset within instance data.
String	toString()	It return a string that describes this field.

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

Returns:

the typecode of the serializable field

Example:

import java.io.ObjectStreamClass;
import java.util.Calendar;

public class ObjectStreamClassExample {
	 public static void main(String[] args) {
		   
	      // create a new object stream class for Integers
	      ObjectStreamClass osc = ObjectStreamClass.lookup(String.class);

	      // get the value field from ObjectStreamClass for integers
	      System.out.println("" + osc.getField("value"));

	      // create a new object stream class for Calendar
	      ObjectStreamClass osc2 = ObjectStreamClass.lookup(Calendar.class);

	      // get the Class instance for osc2
	      System.out.println("" + osc2.getField("isTimeSet"));

	   }
}

Output: