Demo of IllegalAccessException | java.lang package

Figure1

Class Hierarchy:

IllegalAccessException is a class present in java.lang.* package and has following class hierarchy.

Figure2

Description: 


Thrown when an application tries to reflectively (Java Reflection API) create an instance (other than an array), set or get a field, or invoke a method, but the currently executing method does not have access to the definition of the specified class, field, method or constructor.

Since:

JDK1.0

Example:

	package com.javamultiplex.java.lang.exceptions;
	/**
	* @author Rohit Agarwal
	* @version 1.0
	* @category java.lang/Exception
	* @since JDK 1.0
	*/
	class Test {
	private Test() {
	}
	}
	public class IllegalAccessExceptionDemo {
	public static void main(String[] args) {
	try {
	/*
	* IllegalAccessException will be thrown because we are trying to
	* create an instance of Test class that has private no argument
	* constructor.
	*
	*/
	Test test = Test.class.newInstance();
	System.out.println(test);
	} catch (InstantiationException | IllegalAccessException e) {
	e.printStackTrace();
	}
	}
	}

view raw IllegalAccessExceptionDemo.java hosted with ❤ by GitHub

Output:

Figure3

References:

https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalAccessException.html

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