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Java ObjectStreamField isPrimitive() Method with Example

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

ObjectStreamField Class isPrimitive() method

  • isPrimitive() method is available in package.
  • isPrimitive() method is used to check whether this field has a type “primitive” or not.
  • isPrimitive() 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.
  • isPrimitive() method does not throw an exception at the time of checking field type.


    public boolean isPrimitive();


  • It does not accept any parameter.

Return value:

The return type of the method is boolean, it returns true when this field holds primitive type otherwise it returns false.


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

import java.util.*;

public class IsPrimitveOfOSF {
 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 isPrimitive() method is to check
  // whether the field type has primitive or not

  boolean field1_primitive = field1.isPrimitive();
  System.out.println("field1.isPrimitive(): " + field1_primitive);

  boolean field2_primitive = field2.isPrimitive();
  System.out.println("field2.isPrimitive(): " + field2_primitive);


field1.isPrimitive(): true
field2.isPrimitive(): false


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