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How to access the private methods of a class from outside of the 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); } }
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