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Java ObjectStreamField isUnshared() Method with Example

ObjectStreamField Class isUnshared() method: Here, we are going to learn about the isUnshared() method of ObjectStreamField Class with its syntax and example.
Submitted by Preeti Jain, on April 13, 2020

ObjectStreamField Class isUnshared() method

  • isUnshared() method is available in package.
  • isUnshared() method is used to check whether the serializable field denoted by the instance of this ObjectStreamField is "unshared" or not.
  • isUnshared() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • isUnshared() method does not throw an exception at the time of checking the un-shared field.


    public boolean isUnshared();


  • It does not accept any parameter.

Return value:

The return type of the method is boolean, it returns true when the serializable field denoted by this ObjectStreamField instance is unshared otherwise it returns false.


// Java program to demonstrate the example 
// of boolean isUnshared() method 
// of ObjectStreamField

import java.util.*;

public class IsUnsharedOfOSF {
 public static void main(String[] args) {
  // Instantiates ObjectStreamClass for Calendar
  ObjectStreamClass o_sc = ObjectStreamClass.lookup(Calendar.class);

  // By using getField() method is to get the field
  // value from Calendar 
  ObjectStreamField field1 = o_sc.getField("isTimeSet");
  ObjectStreamField field2 = o_sc.getField("fields");

  // By using isUnshared() method is to check
  // whether the field denoted by this object is
  // unshareable or not

  boolean field1_unshared = field1.isUnshared();
  System.out.println("field1.isUnshared(): " + field1_unshared);

  boolean field2_unshared = field2.isUnshared();
  System.out.println("field2.isUnshared(): " + field2_unshared);


field1.isUnshared(): false
field2.isUnshared(): false


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