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

Description

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.

Declaration

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

public void setAccessible(boolean flag)
   throws SecurityException

Parameters

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

Exceptions

SecurityException − if the request is denied.

Example

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

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());
      sampleField.setAccessible(true);
      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;
   } 
}

@Retention(RetentionPolicy.RUNTIME)
@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