java.lang.reflect.AccessibleObject.setAccessible() Method Example



The java.lang.reflect.AccessibleObject.setAccessible(boolean flag) method sets the accessible flag for this object to the indicated boolean value. A value of true indicates that the reflected object should suppress Java language access checking when it is used. A value of false indicates that the reflected object should enforce Java language access checks.


Following is the declaration for java.lang.reflect.AccessibleObject.setAccessible(boolean flag) method.

public void setAccessible(boolean flag)
   throws SecurityException


flag − the new value for the accessible flag in each object.


SecurityException − if the request is denied.


The following example shows the usage of java.lang.reflect.AccessibleObject.setAccessible(boolean flag) method.

Live Demo
package com.tutorialspoint;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Annotation;
import java.lang.reflect.AccessibleObject;

public class AccessibleObjectDemo {
   public static void main(String[] args) throws NoSuchMethodException, 
      SecurityException, NoSuchFieldException {
      AccessibleObject sampleField = SampleClass.class.getDeclaredField("sampleField");
      System.out.println("sampleField.isAccessible: " + sampleField.isAccessible());
      System.out.println("sampleField.isAccessible: " + sampleField.isAccessible());

@CustomAnnotation(name = "SampleClass",  value = "Sample Class Annotation")
class SampleClass {
   private String sampleField;

   @CustomAnnotation(name = "sampleMethod",  value = "Sample Method Annotation")
   public String sampleMethod(){
      return "sample";

   public String getSampleField() {
      return sampleField;

   public void setSampleField(String sampleField) {
      this.sampleField = sampleField;

@interface CustomAnnotation {
   public String name();
   public String value();

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

sampleField.isAccessible: false
sampleField.isAccessible: true