Java.io.ObjectStreamClass.getFields() Method

Description

The java.io.ObjectStreamClass.getFields() method returns an array of the fields of this serializable class.

Declaration

Following is the declaration for java.io.ObjectStreamClass.getFields() method

public ObjectStreamField[] getFields()

Parameters

• NA

Return Value

This method returns an array containing an element for each persistent field of this class. Returns an array of length zero if there are no fields.

Exception

• NA

Example

The following example shows the usage of java.io.ObjectStreamClass.getFields() method.

package com.tutorialspoint;

import java.io.*;
import java.util.Calendar;

public class ObjectStreamClassDemo {

   public static void main(String[] args) {

      // create a new object stream class for Integers
      ObjectStreamClass osc = ObjectStreamClass.lookup(Integer.class);

      // get the fields from ObjectStreamClass for integers
      ObjectStreamField[] list = osc.getFields();

      // print the fields
      for (int i = 0; i < list.length; i++) {
         System.out.println("" + list[i]);
      }

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

      // get the fields for Calendar class
      ObjectStreamField[] list2 = osc2.getFields();

      // print the fields
      for (int i = 0; i < list2.length; i++) {
         System.out.println("" + list2[i]);
      }

   }
}

Let us compile and run the above program, this will produce the following result:

I value
Z areFieldsSet
I firstDayOfWeek
Z isTimeSet
Z lenient
I minimalDaysInFirstWeek
I nextStamp
I serialVersionOnStream
J time
[I fields
[Z isSet
Ljava/util/TimeZone; zone