Can private methods of a class be accessed from outside of a class in Java?

You can access the private methods of a class using java reflection package.

Step1 − Instantiate the Method class of the java.lang.reflect package by passing the method name of the method which is declared private.

Step2 − Set the method accessible by passing value true to the setAccessible() method.

Step3 − Finally, invoke the method using the invoke() method.

Example

import java.lang.reflect.Method;

public class DemoTest {
   private void sampleMethod() {
      System.out.println("hello");
   }
}

public class SampleTest {
   public static void main(String args[]) throws Exception {
      Class c = Class.forName("DemoTest");
      Object obj = c.newInstance();
      Method method = c.getDeclaredMethod("sampleMethod", null);
      method.setAccessible(true);
      method.invoke(obj, null);
   }
}

Samual Sam

Published on 02-Jan-2018 06:44:05

• Related Questions & Answers
• How to access the private methods of a class from outside of the class in Java?
• Are the private variables and private methods of a parent class inherited by the child class in Java?
• List methods of a class using Java Reflection
• Methods of StringBuffer class in Java.
• Methods of StringBuilder class in Java.
• Methods of StringTokenizer class in Java.
• Can a final class be subclassed in Java?
• Can a local variable's memory be accessed outside its scope in C/C++?
• How many ways can a property of a JavaScript object be accessed?
• Methods of the Thread Class
• Methods of the Matcher class in Java Regex
• Methods of the Pattern class in Java Regex
• Can we declare a top level class as protected or private in Java?
• How many ways can get the instance of a Class class in Java?
• Can a class in Java be both final and abstract?